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Dr. Romualdo R. Menezes
UNIVERSIDADE FEDERAL DE CAMPINA GRANDE

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0 Biomaterials
0 Ceramic Materials
0 Nanofibers
0 Scaffolds
0 nano and functional materials

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Journal article
Published: 26 August 2021 in Nanomaterials
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The development of alternatives for wear protection in surface engineering can be responsible for a significant decrease in energy waste as a large amount of the energy produced in the world is lost due to tribological contact. Dynamic Glancing Angle Deposition has been recently evaluated as a route to produce coatings with improved wear performance. In this technique, the substrate oscillates along with a determined range in front of the sputtering target during the growth of the film. In this study, five oscillatory ranges (0, ±5°, ±10°, ±15°, ±20°) were probed to manufacture nanostructured Cr-Al-N coatings using direct current magnetron sputtering, and their impact was investigated on the grain morphology, phase formation, chemical composition, and performance of the coatings. FEG-SEM revealed the formation of multilayer-like architecture across the grains of the coatings. The deposition rate and hardness improved, and a more than 2-fold decrease in the material loss was observed in a comparison between the stationary-deposited conventional coating and the sample produced under ±10° oscillatory range. This indicated the potential use of this technique in future surface engineering applications.

ACS Style

Pedro Renato Tavares Avila; Raíra Chefer Apolinário; Alisson Mendes Rodrigues; Jucielle Veras Fernandes; Romualdo Rodrigues Menezes; Gelmires De Araújo Neves; Haroldo Cavalcanti Pinto. On Improving Wear Resistance of Cr-Al-N Coatings Using Dynamic Glancing Angle DC Magnetron Sputtering. Nanomaterials 2021, 11, 2187 .

AMA Style

Pedro Renato Tavares Avila, Raíra Chefer Apolinário, Alisson Mendes Rodrigues, Jucielle Veras Fernandes, Romualdo Rodrigues Menezes, Gelmires De Araújo Neves, Haroldo Cavalcanti Pinto. On Improving Wear Resistance of Cr-Al-N Coatings Using Dynamic Glancing Angle DC Magnetron Sputtering. Nanomaterials. 2021; 11 (9):2187.

Chicago/Turabian Style

Pedro Renato Tavares Avila; Raíra Chefer Apolinário; Alisson Mendes Rodrigues; Jucielle Veras Fernandes; Romualdo Rodrigues Menezes; Gelmires De Araújo Neves; Haroldo Cavalcanti Pinto. 2021. "On Improving Wear Resistance of Cr-Al-N Coatings Using Dynamic Glancing Angle DC Magnetron Sputtering." Nanomaterials 11, no. 9: 2187.

Journal article
Published: 18 August 2021 in Applied Sciences
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The combination of biocompatible polymers and ceramics shows great promise in the development of composites with suitable mechanical properties for dental applications. In an attempt to further expand this research line, Al2O3 commercial powders (Vitro-ceram, Alglass, In-ceram) were sintered at 1400 °C for 2 h and infiltrated with poly(methyl methacrylate) for potential use in dental prostheses. The infiltration was performed using a homemade apparatus under a pressure of 7 bar for 6 and 12 h. The microstructure (studied using a scanning electron microscope), Archimedes density, 3-point bending flexural strength and Vickers hardness of the prepared composites were assessed and quantitatively compared. In general, microstructural analyses showed ceramic- and polymer-based interpenetrating network in all materials. The preforms infiltrated for 12 h showed superior properties; among them, the Vitro-ceram-based composite also demonstrated a near-zero open porosity and optimum mechanical characteristics. Specifically, its density, strength and hardness were 2.6 ± 0.07 g/cm3, 119.3 ± 5.0 MPa and 1055.1 ± 111.0 HV, respectively, passing the acceptance criteria of ISO 6872 and making it suitable for consideration as a metal-free structure for dental crowns and fixed partial prostheses until three anterior units.

ACS Style

Olimpia Crispim da Silveira; Alisson Mendes Rodrigues; Maziar Montazerian; Hélio De Lucena Lira; Francesco Baino; Romualdo Rodrigues Menezes. Al2O3 Preforms Infiltrated with Poly(methyl methacrylate) for Dental Prosthesis Manufacturing. Applied Sciences 2021, 11, 7583 .

AMA Style

Olimpia Crispim da Silveira, Alisson Mendes Rodrigues, Maziar Montazerian, Hélio De Lucena Lira, Francesco Baino, Romualdo Rodrigues Menezes. Al2O3 Preforms Infiltrated with Poly(methyl methacrylate) for Dental Prosthesis Manufacturing. Applied Sciences. 2021; 11 (16):7583.

Chicago/Turabian Style

Olimpia Crispim da Silveira; Alisson Mendes Rodrigues; Maziar Montazerian; Hélio De Lucena Lira; Francesco Baino; Romualdo Rodrigues Menezes. 2021. "Al2O3 Preforms Infiltrated with Poly(methyl methacrylate) for Dental Prosthesis Manufacturing." Applied Sciences 11, no. 16: 7583.

Journal article
Published: 17 August 2021 in Sustainability
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Tailing incorporation into mortars has been the subject of much research in recent years. Despite this, most of these studies did not investigate the harmful effects resulting from the exposure of such mortars to an environment containing aggressive agents. This work investigated the effects of perlite tailing addition into mortars containing cement CP V-ARI MAX and hydrated lime. The raw materials were subjected to chemical characterization (X-ray fluorescence (XRF)) and mineralogical (X-ray diffraction (XRD)), while the samples immersed in 1 N NaOH solution were characterized by XRD, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and compression strength (CS). The results showed the harmful effects of incorporating perlite tailings into the mortar investigated. Such a degradation was proven by linear expansion and compressive strength experiments accomplished in the samples after the test of resistance to an alkali–silicate reaction.

ACS Style

Roberto Evaristo de Oliveira Neto; Juliana De Melo Cartaxo; Alisson Mendes Rodrigues; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes; Fabiana Pereira da Costa; Sâmea Valensca Alves Barros. Durability Behavior of Mortars Containing Perlite Tailings: Alkali–Silicate Reaction Viewpoint. Sustainability 2021, 13, 9203 .

AMA Style

Roberto Evaristo de Oliveira Neto, Juliana De Melo Cartaxo, Alisson Mendes Rodrigues, Gelmires De Araújo Neves, Romualdo Rodrigues Menezes, Fabiana Pereira da Costa, Sâmea Valensca Alves Barros. Durability Behavior of Mortars Containing Perlite Tailings: Alkali–Silicate Reaction Viewpoint. Sustainability. 2021; 13 (16):9203.

Chicago/Turabian Style

Roberto Evaristo de Oliveira Neto; Juliana De Melo Cartaxo; Alisson Mendes Rodrigues; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes; Fabiana Pereira da Costa; Sâmea Valensca Alves Barros. 2021. "Durability Behavior of Mortars Containing Perlite Tailings: Alkali–Silicate Reaction Viewpoint." Sustainability 13, no. 16: 9203.

Journal article
Published: 31 July 2021 in Journal of the European Ceramic Society
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A new route based on the combination of saponification/gelation/freeze-casting processes, in which the water was used as the solvent, was proposed to produce highly porous ceramics with isometric pores. The saponification reaction using gelatin promoted an inter-connected and equiaxial pore structure with the absence of lamellar pores, even using water as a solvent. The final porosity was up to ∼95%, and the average pore size ranged from ≈200 up to 500 μm. The amount of saponifying agent had a significant influence on the pore size, while the contents of solids had a more substantial effect on the open porosity. The results indicate that the in situ production of surfactant combined with freeze casting technique allows obtaining ceramics with high porosity and isometric pores even using water as a solvent.

ACS Style

Larrisea Nathiere Rangel De Morais Santos; Juliana De Melo Cartaxo; José Rodrigo Sousa Silva; Alisson Mendes Rodrigues; Eugênia Livia De Andrade Dantas; Frederico Barbosa de Sousa; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. High porous ceramics with isometric pores by a novel saponification/gelation/freeze-casting combined route. Journal of the European Ceramic Society 2021, 41, 7111 -7118.

AMA Style

Larrisea Nathiere Rangel De Morais Santos, Juliana De Melo Cartaxo, José Rodrigo Sousa Silva, Alisson Mendes Rodrigues, Eugênia Livia De Andrade Dantas, Frederico Barbosa de Sousa, Gelmires De Araújo Neves, Romualdo Rodrigues Menezes. High porous ceramics with isometric pores by a novel saponification/gelation/freeze-casting combined route. Journal of the European Ceramic Society. 2021; 41 (14):7111-7118.

Chicago/Turabian Style

Larrisea Nathiere Rangel De Morais Santos; Juliana De Melo Cartaxo; José Rodrigo Sousa Silva; Alisson Mendes Rodrigues; Eugênia Livia De Andrade Dantas; Frederico Barbosa de Sousa; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. 2021. "High porous ceramics with isometric pores by a novel saponification/gelation/freeze-casting combined route." Journal of the European Ceramic Society 41, no. 14: 7111-7118.

Journal article
Published: 21 April 2021 in Minerals
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Natural stones (limestones, granites, and marble) from mines located in northeastern Brazil were investigated to discover their potential for use in civil construction. The natural stones were characterized by chemical analysis, X-ray diffraction, differential thermal analysis, and optical microscopy. The physical-mechanical properties (apparent density, porosity, water absorption, compressive and flexural strength, impact, and abrasion) and chemical resistance properties were also evaluated. The results of the physical-mechanical analysis indicated that the natural stones investigated have the potential to be used in different environments (interior, exterior), taking into account factors such as people’s circulation and exposure to chemical agents.

ACS Style

Fabiana Costa; Jucielle Fernandes; Luiz Melo; Alisson Rodrigues; Romualdo Menezes; Gelmires Neves. The Potential for Natural Stones from Northeastern Brazil to Be Used in Civil Construction. Minerals 2021, 11, 440 .

AMA Style

Fabiana Costa, Jucielle Fernandes, Luiz Melo, Alisson Rodrigues, Romualdo Menezes, Gelmires Neves. The Potential for Natural Stones from Northeastern Brazil to Be Used in Civil Construction. Minerals. 2021; 11 (5):440.

Chicago/Turabian Style

Fabiana Costa; Jucielle Fernandes; Luiz Melo; Alisson Rodrigues; Romualdo Menezes; Gelmires Neves. 2021. "The Potential for Natural Stones from Northeastern Brazil to Be Used in Civil Construction." Minerals 11, no. 5: 440.

Journal article
Published: 02 April 2021 in Sustainability
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The effect of acid treatment on the adsorptive capacity of a Brazilian palygorskite to remove the crystal violet (CV) and congo red (CR) dyes was investigated. The raw palygorskite was acid-treated by different HCl solutions (2, 4, and 6 mol/L). The modifications on the palygorskite structure were investigated using X-ray diffraction, X-ray fluorescence, Fourier-transform infrared spectroscopy, N2 adsorption/desorption, and thermogravimetric and differential thermal analysis. The efficiency of CV and CR adsorption was investigated, and the effect of the initial concentration, contact time, pH, and adsorbent amount was analyzed. The results revealed that CV adsorption in the acid-treated palygorskite was higher than that of the raw material. A Langmuir isotherm model was observed for the adsorption behavior of CV, while a Freundlich isotherm model was verified for the CR adsorption. A pseudo-second-order model was observed for the adsorption kinetics of both dyes. The higher CV adsorption capacity was observed at basic pH, higher than 97%, and the higher CR removal was observed at acidic pH, higher than 50%. The adsorption parameters of enthalpy (ΔH), entropy (ΔS), and Gibbs energy (ΔG) were evaluated. The adsorption process of the CV and CR dyes on the raw and acid-treated Brazilian palygorskite was predominantly endothermic and occurred spontaneously. The studied raw palygorskite has a mild-adsorption capacity to remove anionic dyes, while acid-treated samples effectively remove cationic dyes.

ACS Style

Vanderlane Silva; Maria Araújo; Alisson Rodrigues; Juliana Cartaxo; Romualdo Menezes; Gelmires Neves. Adsorption Behavior of Acid-Treated Brazilian Palygorskite for Cationic and Anionic Dyes Removal from the Water. Sustainability 2021, 13, 3954 .

AMA Style

Vanderlane Silva, Maria Araújo, Alisson Rodrigues, Juliana Cartaxo, Romualdo Menezes, Gelmires Neves. Adsorption Behavior of Acid-Treated Brazilian Palygorskite for Cationic and Anionic Dyes Removal from the Water. Sustainability. 2021; 13 (7):3954.

Chicago/Turabian Style

Vanderlane Silva; Maria Araújo; Alisson Rodrigues; Juliana Cartaxo; Romualdo Menezes; Gelmires Neves. 2021. "Adsorption Behavior of Acid-Treated Brazilian Palygorskite for Cationic and Anionic Dyes Removal from the Water." Sustainability 13, no. 7: 3954.

Journal article
Published: 02 April 2021 in Minerals
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Osteoporosis is a public health problem, with bone loss being the main consequence. Hydroxyapatite (HA) has been largely used as a bioceramic to stimulate bone growth. In our work, a cerium-containing HA (Ce-HA) has been proposed and its effects on the antimicrobial and bone-inducing properties were investigated. The synthesis of the materials occurred by the suspension–precipitation method (SPM). The XRD (X-ray Diffraction) confirmed the crystalline phase, and the Rietveld refinement confirmed the crystallization of HA and Ce-HA in a hexagonal crystal structure in agreement with ICSD n° 26205. Characterizations by FT-IR (Fourier Transform Infrared Spectroscopy), XPS (X-ray Photoemission Spectroscopy), and FESEM-EDS (Field Emission Scanning Electron Microscope-Energy Dispersive X-ray Spectroscopy) confirmed the presence of cerium (Ce3+ and Ce4+). The antibacterial activity of Has was evaluated against Staphylococcus aureus 25,923 and Escherichia coli 25,922 strains, which revealed that the material has antimicrobial properties and the cytotoxicity assay indicated that Ce-containing HA was classified as non-toxic. The effects of Ce-HA on bone repair, after application in bone defects in the tibia of female rats with osteoporosis induced by ovariectomy (OVX), were evaluated. After 15 and 30 days of implantation, the samples were analyzed by Raman, histology and X-ray microtomography. The results showed that the animals that had the induced bone defects filled with the Ce-HA materials had more expressive bone neoformation than the control group.

ACS Style

Ewerton Vieira; Marcos Silva; Antonio Maia-Filho; Daniel Ferreira; José Figuerêdo-Silva; Karla Rovaris; Ana Fialho; Ana Leite-Oliveira; André Menezes de Oliveira; Maria da Fonseca; Josy Osajima; Edson da Silva-Filho. Effect of Cerium-Containing Hydroxyapatite in Bone Repair in Female Rats with Osteoporosis Induced by Ovariectomy. Minerals 2021, 11, 377 .

AMA Style

Ewerton Vieira, Marcos Silva, Antonio Maia-Filho, Daniel Ferreira, José Figuerêdo-Silva, Karla Rovaris, Ana Fialho, Ana Leite-Oliveira, André Menezes de Oliveira, Maria da Fonseca, Josy Osajima, Edson da Silva-Filho. Effect of Cerium-Containing Hydroxyapatite in Bone Repair in Female Rats with Osteoporosis Induced by Ovariectomy. Minerals. 2021; 11 (4):377.

Chicago/Turabian Style

Ewerton Vieira; Marcos Silva; Antonio Maia-Filho; Daniel Ferreira; José Figuerêdo-Silva; Karla Rovaris; Ana Fialho; Ana Leite-Oliveira; André Menezes de Oliveira; Maria da Fonseca; Josy Osajima; Edson da Silva-Filho. 2021. "Effect of Cerium-Containing Hydroxyapatite in Bone Repair in Female Rats with Osteoporosis Induced by Ovariectomy." Minerals 11, no. 4: 377.

Journal article
Published: 01 January 2021 in Matéria (Rio de Janeiro)
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RESUMO Mulita é um material que tem recebido atenção especial devido às suas propriedades químicas, físicas e mecânicas, que estão correlacionadas com o método de síntese utilizado. O método sol-gel destaca-se frente aos outros métodos químicos devido à possibilidade de obtenção de materiais com elevado grau de pureza e baixas temperaturas de síntese. Sendo assim, este trabalho teve por objetivo a análise dos solventes água, álcool etílico, álcool isopropílico e tetrahidrofurano, na obtenção de mulita por meio da rota sol-gel. As amostras foram caracterizadas por difração de raios X (DRX), análise termogravimétrica e diferencial (TG/ATD), adsorção de nitrogênio, microscopia eletrônica de varredura (MEV) e microscopia eletrônica de transmissão (MET). Os resultados mostraram que a mulita foi sintetizada com todos os solventes, porém, o uso dos álcoois como solvente proporcionou a obtenção das amostras mais cristalinas, com as menores perdas de massa, com uma morfologia formada por agregados e partículas individualizadas.

ACS Style

Aluska Do Nascimento Simões Braga; Geysivana Kessya Garcia Carvalho; Hélio De Lucena Lira; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. Influência de diferentes solventes na síntese de mulita por sol-gel. Matéria (Rio de Janeiro) 2021, 26, 1 .

AMA Style

Aluska Do Nascimento Simões Braga, Geysivana Kessya Garcia Carvalho, Hélio De Lucena Lira, Gelmires De Araújo Neves, Romualdo Rodrigues Menezes. Influência de diferentes solventes na síntese de mulita por sol-gel. Matéria (Rio de Janeiro). 2021; 26 (2):1.

Chicago/Turabian Style

Aluska Do Nascimento Simões Braga; Geysivana Kessya Garcia Carvalho; Hélio De Lucena Lira; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. 2021. "Influência de diferentes solventes na síntese de mulita por sol-gel." Matéria (Rio de Janeiro) 26, no. 2: 1.

Journal article
Published: 01 December 2020 in Engenharia Sanitaria e Ambiental
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RESUMO Este trabalho objetivou imobilizar metais pesados presentes nos resíduos de quartzito por meio da incorporação em argamassas em substituição total ao agregado natural. Dois tipos de resíduos foram utilizados: os resíduos de fragmentação das aparas (QS) e os do pó de serragem (QP). Os resíduos foram caracterizados por fluorescência de raios X, difração de raios X e ensaios de toxidade conforme metodologia da Norma Brasileira (NBR) 10005, da NBR 10006 e do Toxicity Characteristic Leaching Procedure (TCLP) 1311. Então, foram analisadas composições de argamassas contendo cimento, cal e os resíduos (QS, QP) utilizando-se a técnica de delineamento de mistura, determinando os melhores traços, o melhor tipo de cura (imersa ou úmida) e, posteriormente, avaliando a resistência dos corpos de prova após cura. A caracterização do resíduo de quartzito revelou a presença de vários metais pesados e extratos lixiviados em contato com a água, classificando-o como resíduo de Classe I — Perigoso. Os resultados indicam que as composições determinadas foram capazes de imobilizar os metais pesados presentes nos resíduos de quartzitos, bem como resultou em argamassas com resistências mecânicas superiores a 2 MPa. Por fim, mostrou-se que essa técnica de solubilização e estabilização dos contaminantes presentes nos resíduos de quartzito é uma alternativa tecnologicamente viável e ambientalmente adequada para a destinação final desses resíduos.

ACS Style

Sâmea Valensca Alves Barros; Gerbeson Carlos Batista Dantas; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. Imobilização de metais pesados presentes nos resíduos de quartzito por meio da incorporação em argamassas com substituição total do agregado natural. Engenharia Sanitaria e Ambiental 2020, 25, 833 -845.

AMA Style

Sâmea Valensca Alves Barros, Gerbeson Carlos Batista Dantas, Gelmires De Araújo Neves, Romualdo Rodrigues Menezes. Imobilização de metais pesados presentes nos resíduos de quartzito por meio da incorporação em argamassas com substituição total do agregado natural. Engenharia Sanitaria e Ambiental. 2020; 25 (6):833-845.

Chicago/Turabian Style

Sâmea Valensca Alves Barros; Gerbeson Carlos Batista Dantas; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes. 2020. "Imobilização de metais pesados presentes nos resíduos de quartzito por meio da incorporação em argamassas com substituição total do agregado natural." Engenharia Sanitaria e Ambiental 25, no. 6: 833-845.

Journal article
Published: 16 November 2020 in Colloids and Surfaces B: Biointerfaces
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Recently, zinc-based materials have gained immense attention as antimicrobial agents. In this study, zinc-doped mesoporous hydroxyapatites (HAps) with various Zn contents were prepared by co-precipitation using a phosphoprotein as the porous template. The use of the phosphoprotein as the porous template resulted in the formation of zinc-doped mesoporous HAps (mHAps) with large pores and specific surface area (182 m2 g-1), as indicated by the nitrogen adsorption/desorption measurements. The formation of the zinc-doped HAps was confirmed by various analytical techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The biomaterials prepared in this study were used as antimicrobial agents against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. The Zn2%-mHAp sample showed the maximum bacterial inhibitory concentrations of 50 ± 5% and 77 ± 5% for the gram-positive and gram-negative bacteria, respectively. The antibacterial activity of the mHAp samples depended strongly on their Zn2+ content. Thus, the use of a biotemplate and Zn2+ ions is an efficient approach for the formation of novel HAp-based biomaterials with promising antibacterial properties. This synthesis approach will pave a new pathway for the functionalization of other materials for different biomedical applications.

ACS Style

Cleibson Oliveira de Lima; André L. Menezes de Oliveira; Laís Chantelle; Edson C. Silva Filho; Maguy Jaber; Maria Gardênia Fonseca. Zn-doped mesoporous hydroxyapatites and their antimicrobial properties. Colloids and Surfaces B: Biointerfaces 2020, 198, 111471 .

AMA Style

Cleibson Oliveira de Lima, André L. Menezes de Oliveira, Laís Chantelle, Edson C. Silva Filho, Maguy Jaber, Maria Gardênia Fonseca. Zn-doped mesoporous hydroxyapatites and their antimicrobial properties. Colloids and Surfaces B: Biointerfaces. 2020; 198 ():111471.

Chicago/Turabian Style

Cleibson Oliveira de Lima; André L. Menezes de Oliveira; Laís Chantelle; Edson C. Silva Filho; Maguy Jaber; Maria Gardênia Fonseca. 2020. "Zn-doped mesoporous hydroxyapatites and their antimicrobial properties." Colloids and Surfaces B: Biointerfaces 198, no. : 111471.

Journal article
Published: 12 November 2020 in Sustainability
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In this study, we develop ceramic formulations based on quartzite and scheelite tailings collected from mining companies in the northeast of Brazil (Rio Grande do Norte State). New ceramic samples (27 wt% of kaolin, 29 wt% of plastic clay, 11 wt% of quartzite tailing, and 0–8 wt% scheelite tailing) were uniaxially pressed in two steps (20 MPa and 50 Mpa for 20 s); dried at 110 °C for 24 h; and sintered at 1150 °C, 1200 °C, and 1250 °C. The main mineralogical phases (mullite, quartz, calcite, and anorthite) of the sintered samples were identified using X-ray diffraction (XRD). After evaluation of the physical-mechanical properties (water absorption, linear shrinkage, apparent porosity, and flexural strength), it was observed that the incorporation of scheelite tailing by up to 8 wt% did not significantly alter the properties of samples sintered at all temperatures. Our results indicate that the new ceramics formulations developed have strong potentials in manufacturing sustainable materials such as ceramic tiles and porcelain stoneware.

ACS Style

Jucielle Fernandes; Danyelle Guedes; Fabiana Da Costa; Alisson Rodrigues; Gelmires Neves; Romualdo Menezes; Lisiane Santana. Sustainable Ceramic Materials Manufactured from Ceramic Formulations Containing Quartzite and Scheelite Tailings. Sustainability 2020, 12, 9417 .

AMA Style

Jucielle Fernandes, Danyelle Guedes, Fabiana Da Costa, Alisson Rodrigues, Gelmires Neves, Romualdo Menezes, Lisiane Santana. Sustainable Ceramic Materials Manufactured from Ceramic Formulations Containing Quartzite and Scheelite Tailings. Sustainability. 2020; 12 (22):9417.

Chicago/Turabian Style

Jucielle Fernandes; Danyelle Guedes; Fabiana Da Costa; Alisson Rodrigues; Gelmires Neves; Romualdo Menezes; Lisiane Santana. 2020. "Sustainable Ceramic Materials Manufactured from Ceramic Formulations Containing Quartzite and Scheelite Tailings." Sustainability 12, no. 22: 9417.

Review
Published: 06 November 2020 in Materials
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Chitosan, derived from chitin, is a biopolymer consisting of arbitrarily distributed β-(1-4)-linked D-glucosamine and N-acetyl-D-glucosamine that exhibits outstanding properties— biocompatibility, biodegradability, non-toxicity, antibacterial activity, the capacity to form films, and chelating of metal ions. Most of these peculiar properties are attributed to the presence of free protonable amino groups along the chitosan backbone, which also gives it solubility in acidic conditions. Moreover, this biopolymer can also be physically modified, thereby presenting a variety of forms to be developed. Consequently, this polysaccharide is used in various fields, such as tissue engineering, drug delivery systems, and cancer treatment. In this sense, this review aims to gather the state-of-the-art concerning this polysaccharide when used as a biomaterial, providing information about its characteristics, chemical modifications, and applications. We present the most relevant and new information about this polysaccharide-based biomaterial’s applications in distinct fields and also the ability of chitosan and its various derivatives to selectively permeate through the cancer cell membranes and exhibit anticancer activity, and the possibility of adding several therapeutic metal ions as a strategy to improve the therapeutic potential of this polymer.

ACS Style

Rayssa De Sousa Victor; Adillys Marcelo Da Cunha Santos; Bianca Viana De Sousa; Gelmires De Araújo Neves; Lisiane Navarro De Lima Santana; Romualdo Rodrigues Menezes. A Review on Chitosan’s Uses as Biomaterial: Tissue Engineering, Drug Delivery Systems and Cancer Treatment. Materials 2020, 13, 4995 .

AMA Style

Rayssa De Sousa Victor, Adillys Marcelo Da Cunha Santos, Bianca Viana De Sousa, Gelmires De Araújo Neves, Lisiane Navarro De Lima Santana, Romualdo Rodrigues Menezes. A Review on Chitosan’s Uses as Biomaterial: Tissue Engineering, Drug Delivery Systems and Cancer Treatment. Materials. 2020; 13 (21):4995.

Chicago/Turabian Style

Rayssa De Sousa Victor; Adillys Marcelo Da Cunha Santos; Bianca Viana De Sousa; Gelmires De Araújo Neves; Lisiane Navarro De Lima Santana; Romualdo Rodrigues Menezes. 2020. "A Review on Chitosan’s Uses as Biomaterial: Tissue Engineering, Drug Delivery Systems and Cancer Treatment." Materials 13, no. 21: 4995.

Original paper
Published: 23 October 2020 in Clean Technologies and Environmental Policy
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To increase the effectiveness of fertilizers, new controlled release nitrogen fertilizers have been developed from a mixture of urea and natural smectitic clays and organoclays with different surfactants (ionic and nonionic) encapsulated in an insoluble, biodegradable polymer film. Smectitic clays were classified according to their chemical, physical and mineralogical aspects. Mixtures of urea and natural/organoclays were pressed, and the specimens were dipped into a polymeric solution of poly-ε-caprolactone and acetone (solvent). The resulting controlled release fertilizers were analyzed by infrared spectroscopy and by scanning electron microscopy. The release of urea was evaluated by kinetic dissolution test in aqueous medium as determined by analysis on a UV–visible spectrophotometer. The results have shown that organoclays, especially those with nonionic surfactant coated with a PCL film, favored kinetic and gradual delay in the release of urea. This meets the standards established by the European Committee for Standardization, favoring, therefore, important agro-industrial advances at both national and international levels, securing sustainability in the technological sector.

ACS Style

I. A. Silva; D. S. Silva; M. U. Sousa; R. R. Menezes; H. S. Ferreira; G. A. Neves. Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release. Clean Technologies and Environmental Policy 2020, 22, 2163 -2176.

AMA Style

I. A. Silva, D. S. Silva, M. U. Sousa, R. R. Menezes, H. S. Ferreira, G. A. Neves. Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release. Clean Technologies and Environmental Policy. 2020; 22 (10):2163-2176.

Chicago/Turabian Style

I. A. Silva; D. S. Silva; M. U. Sousa; R. R. Menezes; H. S. Ferreira; G. A. Neves. 2020. "Encapsulation of nitrogen fertilizers in mixtures with organoclays for controlled release." Clean Technologies and Environmental Policy 22, no. 10: 2163-2176.

Journal article
Published: 09 September 2020 in Sustainability
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The inadequate discharge of effluents from different sources without prior treatment can impact the characteristics of soil and water, which reflect serious environmental problems. Advanced oxidative processes (AOP) appear as a viable alternative for environmental remediation, including wastewater treatment. Herein, α-MoO3 and α-Fe2O3 semiconductors were synthesized at low temperature by a Pechini-based method and then applied in photocatalysis. The catalytic efficiency was performed under visible light toward the degradation of an organic persistent pollutant (Rhodamine B dye, RhB), commonly present in industries wastewater. The results indicated that the synthesized α-MoO3 or α-Fe2O3 photocatalysts presented a pronounced activity and promoted an efficient RhB degradation after 15 min of reaction. α-MoO3 had a degradation efficiency of 93% and 98%, while α-Fe2O3 showed 67% and 100% RhB degradation without and with the addition of H2O2, respectively. These results suggest that the synthesized oxides have high oxi-reductive capacity, which can be used for a fast and effective photodegradation of RhB and other organic persistent pollutants to minimize environmental impacts.

ACS Style

Herbet Sales; André Menezes; Gelmires Neves; João Souza; Jailson Ferreira; Laís Chantelle; André Menezes De Oliveira; Hélio Lira. Development of Sustainable Heterogeneous Catalysts for the Photocatalytic Treatment of Effluents. Sustainability 2020, 12, 7393 .

AMA Style

Herbet Sales, André Menezes, Gelmires Neves, João Souza, Jailson Ferreira, Laís Chantelle, André Menezes De Oliveira, Hélio Lira. Development of Sustainable Heterogeneous Catalysts for the Photocatalytic Treatment of Effluents. Sustainability. 2020; 12 (18):7393.

Chicago/Turabian Style

Herbet Sales; André Menezes; Gelmires Neves; João Souza; Jailson Ferreira; Laís Chantelle; André Menezes De Oliveira; Hélio Lira. 2020. "Development of Sustainable Heterogeneous Catalysts for the Photocatalytic Treatment of Effluents." Sustainability 12, no. 18: 7393.

Original article
Published: 07 September 2020 in International Journal of Applied Ceramic Technology
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Ceramics containing cordierite and mullite as their principal phases are promising for many applications, due to properties such as a low coefficient of thermal expansion, high durability, low dielectric constant, resistance to thermal shock, and refractoriness. The objective of this study was to produce ceramic composites suitable for use as refractory materials. The raw materials were subjected to chemical characterization and the formulations to physical, chemical, and mineralogical characterization. The specimens were formed by pressing, dried at 110°C, and sintered from 1150°C to 1300°C for 2 hours. The following properties were then determined: linear shrinkage, water absorption, apparent porosity, and flexural modulus of rupture. The phases formed, crystal morphology, and coefficient of thermal expansion were evaluated. The cordierite and mullite phases were observed in all formulations at 1250°C and 1300°C. The results obtained from the formulations with a higher content of fine kaolin residue suggest that these formulations have the potential to be used for the manufacture of refractory materials such as furnace rollers and supports.

ACS Style

Igor Pinheiro De Brito; Ester Pires De Almeida; Gelmires De Araújo Neves; Hélio De Lucena Lira; Romualdo Rodrigues Menezes; Valmir José Da Silva; Lisiane Navarro De Lima Santana. Development of cordierite/mullite composites using industrial wastes. International Journal of Applied Ceramic Technology 2020, 18, 253 -261.

AMA Style

Igor Pinheiro De Brito, Ester Pires De Almeida, Gelmires De Araújo Neves, Hélio De Lucena Lira, Romualdo Rodrigues Menezes, Valmir José Da Silva, Lisiane Navarro De Lima Santana. Development of cordierite/mullite composites using industrial wastes. International Journal of Applied Ceramic Technology. 2020; 18 (1):253-261.

Chicago/Turabian Style

Igor Pinheiro De Brito; Ester Pires De Almeida; Gelmires De Araújo Neves; Hélio De Lucena Lira; Romualdo Rodrigues Menezes; Valmir José Da Silva; Lisiane Navarro De Lima Santana. 2020. "Development of cordierite/mullite composites using industrial wastes." International Journal of Applied Ceramic Technology 18, no. 1: 253-261.

Journal article
Published: 19 August 2020 in Ceramics International
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In this work nanofibrous 3D scaffolds of bioactive glasses (58S, 60%SiO2–36%CaO–4%P2O5 in mol and 63S, 65%SiO2–31%CaO–4%P2O5 in mol) were produced by a one-step solution blow spinning (SBS) process. A green synthesis route was used with water as solvent and PVA (polyvinyl alcohol), 8 wt%, as a spinning agent. The physical properties of the scaffolds were studied, and their bioactivity assessed using simulated body fluid (SBF) and cell viability evaluated with MC3T3-E1 cells. After immersion in SBF, hydroxyapatite formed on the surface of the fibers within 12 h in both compositions. Pre-osteoblastic cells MC3T3-E1 were seeded on nanofiber surfaces and the bioactive glass scaffolds displayed enhanced cell number, protein synthesis and differentiation levels of alkaline phosphatase activity consistent with cytocompatibility. Such novel biomaterials have high potential to be used as scaffolds in tissue engineering for bone regeneration.

ACS Style

Eudes L.G. Medeiros; Déborah S. Gomes; Adillys M.C. Santos; Rafaela Honorato Vieira; Isabela Lemos de Lima; Flaviana Soares Rocha; Leticia De Souza Castro-Filice; Eliton S. Medeiros; Gelmires A. Neves; Romualdo R. Menezes. 3D nanofibrous bioactive glass scaffolds produced by one-step spinning process. Ceramics International 2020, 47, 102 -110.

AMA Style

Eudes L.G. Medeiros, Déborah S. Gomes, Adillys M.C. Santos, Rafaela Honorato Vieira, Isabela Lemos de Lima, Flaviana Soares Rocha, Leticia De Souza Castro-Filice, Eliton S. Medeiros, Gelmires A. Neves, Romualdo R. Menezes. 3D nanofibrous bioactive glass scaffolds produced by one-step spinning process. Ceramics International. 2020; 47 (1):102-110.

Chicago/Turabian Style

Eudes L.G. Medeiros; Déborah S. Gomes; Adillys M.C. Santos; Rafaela Honorato Vieira; Isabela Lemos de Lima; Flaviana Soares Rocha; Leticia De Souza Castro-Filice; Eliton S. Medeiros; Gelmires A. Neves; Romualdo R. Menezes. 2020. "3D nanofibrous bioactive glass scaffolds produced by one-step spinning process." Ceramics International 47, no. 1: 102-110.

Journal article
Published: 14 August 2020 in Materials
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The efficiency of acid treatment on natural calcium bentonite (natural bentonite) for anionic dye adsorption was investigated using methyl orange (MO) as a probe. Additionally, adsorption experiments were accomplished between the natural bentonite, acidified bentonite, and a cationic dye (methylene blue, MB). Acid functionalization in natural bentonite (RF) was carried out with HCl and H2SO4 acids (RF1 and RF2, respectively). The samples were characterized by chemical analysis, mineralogy, particle size, and thermal behavior with the associated mass losses. The adsorption efficiency of MO and MB dyes was investigated by the effects of the initial concentration of adsorbate (Ci) and the contact time (tc). The acid treatment was efficient for increasing the adsorption capacity of the anionic dye, and the Qmaxexp values measured were 2.2 mg/g, 67.4 mg/g e 47.8 mg/g to RF, RF1 e RF2, respectively. On the other hand, the acid functionalization of bentonite did not significantly modify the MB dye adsorption. The Sips equation was the best fit for the adsorption isotherms. Thus, we found that the acid-functionalized bentonite increases the anionic dye adsorption by up to 8000%. The increased adsorptive capacity of acidified bentonite was explained in terms of electrostatic attraction between the clay surface and the dye molecule.

ACS Style

Jucielle Veras Fernandes; Alisson Mendes Rodrigues; Romualdo Rodrigues Menezes; Gelmires De Araújo Neves. Adsorption of Anionic Dye on the Acid-Functionalized Bentonite. Materials 2020, 13, 3600 .

AMA Style

Jucielle Veras Fernandes, Alisson Mendes Rodrigues, Romualdo Rodrigues Menezes, Gelmires De Araújo Neves. Adsorption of Anionic Dye on the Acid-Functionalized Bentonite. Materials. 2020; 13 (16):3600.

Chicago/Turabian Style

Jucielle Veras Fernandes; Alisson Mendes Rodrigues; Romualdo Rodrigues Menezes; Gelmires De Araújo Neves. 2020. "Adsorption of Anionic Dye on the Acid-Functionalized Bentonite." Materials 13, no. 16: 3600.

Paper
Published: 13 July 2020 in RSC Advances
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A stable moisturizing cosmetic emulsion was developed from babassu nut oil and high concentrations of sunscreens.

ACS Style

Michael Jackson Ferreira DA Silva; Alisson Mendes Rodrigues; Italo Rennan Sousa Vieira; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes; Eloisa Da Graça Do Rosário Gonçalves; Maria Célia Costa Pires. Development and characterization of a babassu nut oil-based moisturizing cosmetic emulsion with a high sun protection factor. RSC Advances 2020, 10, 26268 -26276.

AMA Style

Michael Jackson Ferreira DA Silva, Alisson Mendes Rodrigues, Italo Rennan Sousa Vieira, Gelmires De Araújo Neves, Romualdo Rodrigues Menezes, Eloisa Da Graça Do Rosário Gonçalves, Maria Célia Costa Pires. Development and characterization of a babassu nut oil-based moisturizing cosmetic emulsion with a high sun protection factor. RSC Advances. 2020; 10 (44):26268-26276.

Chicago/Turabian Style

Michael Jackson Ferreira DA Silva; Alisson Mendes Rodrigues; Italo Rennan Sousa Vieira; Gelmires De Araújo Neves; Romualdo Rodrigues Menezes; Eloisa Da Graça Do Rosário Gonçalves; Maria Célia Costa Pires. 2020. "Development and characterization of a babassu nut oil-based moisturizing cosmetic emulsion with a high sun protection factor." RSC Advances 10, no. 44: 26268-26276.

Journal article
Published: 18 June 2020 in Applied Surface Science
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Photocatalysts based on SrSnO3 and [email protected] were prepared by the modified-Pechini method and applied in the photocatalytic degradation of a textile azo-dye under UV radiation. The photohydroxylation of terephthalic acid and scavengers were employed in order to evaluate the participation of each active species, such as hydroxyl radical, and photogenerated electrons and holes on the photocatalytic process. The band gap structure was evaluated using the Mott Schottky method in combination with UV–visible spectrophotometry. Both samples had high photocatalytic activity, although [email protected] showed the best decolorization performance ranging from 32% to 98%. This behavior was assigned to the best dispersion of the active phase on the support and to the Sn(II) reduced states, observed by XPS. The participation of hydroxyl radicals in the reaction was confirmed when terephthalic acid was used as probe and by using isopropanol as hydroxyl radical scavenger, which resulted in the inhibition of the photocatalytic process.

ACS Style

Luzia Maria Castro Honorio; André Luiz Menezes de Oliveira; Edson Cavalcanti Da Silva Filho; Josy Anteveli Osajima; Amer Hakki; Donald E. Macphee; Iêda Maria Garcia dos Santos. Supporting the photocatalysts on ZrO2: An effective way to enhance the photocatalytic activity of SrSnO3. Applied Surface Science 2020, 528, 146991 .

AMA Style

Luzia Maria Castro Honorio, André Luiz Menezes de Oliveira, Edson Cavalcanti Da Silva Filho, Josy Anteveli Osajima, Amer Hakki, Donald E. Macphee, Iêda Maria Garcia dos Santos. Supporting the photocatalysts on ZrO2: An effective way to enhance the photocatalytic activity of SrSnO3. Applied Surface Science. 2020; 528 ():146991.

Chicago/Turabian Style

Luzia Maria Castro Honorio; André Luiz Menezes de Oliveira; Edson Cavalcanti Da Silva Filho; Josy Anteveli Osajima; Amer Hakki; Donald E. Macphee; Iêda Maria Garcia dos Santos. 2020. "Supporting the photocatalysts on ZrO2: An effective way to enhance the photocatalytic activity of SrSnO3." Applied Surface Science 528, no. : 146991.

Research article
Published: 27 April 2020 in Inorganic Chemistry
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The impact of Eu3+ doping at the Sr2+ and Sn4+ sites in SrSnO3 on its structural and electronic properties was studied and correlated with the photocatalytic efficiency. The compounds were synthesized using a modified Pechini method. Refinement of the synchrotron X-ray diffraction (S-XRD) data showed that the samples had an orthorhombic Pbnm symmetry. The incorporation of Eu into the lattice led to increased short- and long-range disorder, inducing additional distortion in the SnO6. XANES measurements revealed that mixed Eu valences (Eu3+ and Eu2+) were present in Eu-doped samples, and DFT calculations confirmed the presence of these ions at Sr2+/Sr4+ sites in the SrSnO3, resulting in changes in the electronic behavior. The catalytic performance toward Remazol yellow dye photodegradation and the catalysts' surface properties were also evaluated. The catalytic efficiency followed the order of Sr(Sn0.99Eu0.01)SnO3 > (Sr0.99Eu0.01)SnO3 > SrSnO3. The order was clearly related to selected-site doping that changed the degree of the inter- and intraoctahedral distortion and the introduction of different Eu midgap states, which apparently favor charge separation upon photoexcitation during photocatalysis. The results shown here are of great importance to the functionalization of SrSnO3 and other perovskite materials by lanthanoid ions, especially Eu3+, for effective applications as photocatalysts.

ACS Style

Laís Chantelle; André L. Menezes De Oliveira; Brendan J. Kennedy; Jefferson Maul; Márcia R. S. Da Silva; Thiago Marinho Duarte; Anderson R. Albuquerque; Julio R. Sambrano; Richard Landers; Máximo Siu-Li; Elson Longo; Iêda M. G. Dos Santos. Probing the Site-Selective Doping in SrSnO3:Eu Oxides and Its Impact on the Crystal and Electronic Structures Using Synchrotron Radiation and DFT Simulations. Inorganic Chemistry 2020, 59, 7666 -7680.

AMA Style

Laís Chantelle, André L. Menezes De Oliveira, Brendan J. Kennedy, Jefferson Maul, Márcia R. S. Da Silva, Thiago Marinho Duarte, Anderson R. Albuquerque, Julio R. Sambrano, Richard Landers, Máximo Siu-Li, Elson Longo, Iêda M. G. Dos Santos. Probing the Site-Selective Doping in SrSnO3:Eu Oxides and Its Impact on the Crystal and Electronic Structures Using Synchrotron Radiation and DFT Simulations. Inorganic Chemistry. 2020; 59 (11):7666-7680.

Chicago/Turabian Style

Laís Chantelle; André L. Menezes De Oliveira; Brendan J. Kennedy; Jefferson Maul; Márcia R. S. Da Silva; Thiago Marinho Duarte; Anderson R. Albuquerque; Julio R. Sambrano; Richard Landers; Máximo Siu-Li; Elson Longo; Iêda M. G. Dos Santos. 2020. "Probing the Site-Selective Doping in SrSnO3:Eu Oxides and Its Impact on the Crystal and Electronic Structures Using Synchrotron Radiation and DFT Simulations." Inorganic Chemistry 59, no. 11: 7666-7680.