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She graduated at the Faculty of Chemical Engineering and Technology, University of Zagreb in 1990. After graduating she worked at the Department of Analytical Chemistry of the Faculty of Chemical Engineering and Technology, University of Zagreb. In 1995 she acquired the Master’s degree and the Doctor’s degree in 1999 at the Faculty of Chemical Engineering and Technology in Zagreb. Since 2000 she has been working at the Department of Materials of the Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb. She is now Full Professor at Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb. The scientific work includes research in the field of applied chemistry, materials science, and environmental engineering having in focus advanced ceramics as well as synthesis, application, and development of TiO2 based nanostructured film as well as nanoparticles photocatalysts for degradation of trace organic contaminants, such as pharmaceuticals. She has published more than 100 papers in SCI journals, 5 book chapters, and more than 100 papers in journals and proceedings of international and national conferences. The complete bibliography is available under: http://bib.irb.hr/lista-radova?autor=189524&lang=EN
The three-component hybrid (rGO/TiO2/CN) nanocomposite was prepared in order to enhance the photocatalytic properties of anatase TiO2 nanoparticles (NPs) under solar-like irradiation. The rGO/TiO2/CN was prepared in a mixture of the reduced graphene oxide (rGO, 8 wt%), anatase TiO2 nanoparticles (NPs), and graphitic carbon nitride (g-C3N4, 16 wt%). It was self-assembled through the one-step hydrothermal method, followed by an annealing process. The photocatalyst was thoroughly characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), the Brunauer-Emmett-Teller (BET) nitrogen adsorption/desorption technique and UV-Vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the TiO2, TiO2/rGO, TiO2/CN and hybrid rGO/TiO2/CN nanocomposite was studied through the degradation of a rhodamine B (RhB) aqueous solution under solar-like irradiation. The results showed that the highest photocatalytic activity was achieved by the rGO/TiO2/CN mixture, which can be attributed to the synergistic effect of the incorporation of both rGO and g-C3N4 with TiO2. Further, the influence of the pH value of the RhB dye aqueous solution and different water matrix (Milli-Q, tap, and alkaline water) on the photocatalytic efficiency of the rGO/TiO2/CN nanocomposite was examined. In addition, a recycle test was performed for hybrid [email protected]2/CN to investigate the effectiveness of the photodegradation of RhB dye in three successive cycles. The conducted results indicate that the pH value of RhB dye aqueous solution and water matrices play an important role in the photocatalytic degradation rate.
Martina Kocijan; Lidija Ćurković; Tina Radošević; Matejka Podlogar. Enhanced Photocatalytic Activity of Hybrid [email protected]2/CN Nanocomposite for Organic Pollutant Degradation under Solar Light Irradiation. Catalysts 2021, 11, 1023 .
AMA StyleMartina Kocijan, Lidija Ćurković, Tina Radošević, Matejka Podlogar. Enhanced Photocatalytic Activity of Hybrid [email protected]2/CN Nanocomposite for Organic Pollutant Degradation under Solar Light Irradiation. Catalysts. 2021; 11 (9):1023.
Chicago/Turabian StyleMartina Kocijan; Lidija Ćurković; Tina Radošević; Matejka Podlogar. 2021. "Enhanced Photocatalytic Activity of Hybrid [email protected]2/CN Nanocomposite for Organic Pollutant Degradation under Solar Light Irradiation." Catalysts 11, no. 9: 1023.
In this work, a single-layer TiO2–ZrO2 thin film is deposited on the AISI 316L austenitic stainless steel by the sol–gel process and the dip coating method to improve its corrosion resistance properties. For the sol preparation, titanium isopropoxide and zirconium butoxide are used as the precursors, yttrium acetate hydrate is used for the ZrO2 stabilization, i-propanol as the solvent, nitric acid as the catalyst, acetylacetone as the chelating agent, and the distilled water for the hydrolysis. The deposited films are annealed at 400 °C or 600 °C. Morphology and phase composition of the sol–gel TiO2–ZrO2 films and powders are analyzed by scanning electron microscopy (SEM) equipped with EDX detector and X-ray diffraction (XRD), respectively. The thickness of the sol–gel TiO2–ZrO2 films deposited on the stainless steel is determined by glow discharge optical emission spectrometry (GD-OES). The corrosion behavior of the stainless steel, coated by amorphous films, is evaluated in 3 wt% NaCl and 0.5 mol dm−3 HCl by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. It is found that the sol–gel TiO2–ZrO2 films with the amorphous structure, deposited by the sol–gel process, and calcined at 400 °C significantly enhance the corrosion properties of AISI 316L in both chloride media.
Lidija Ćurković; Helena Otmačić Ćurković; Irena Žmak; Mihone Kerolli Mustafa; Ivana Gabelica. Corrosion Behavior of Amorphous Sol–Gel TiO2–ZrO2 Nano Thickness Film on Stainless Steel. Coatings 2021, 11, 988 .
AMA StyleLidija Ćurković, Helena Otmačić Ćurković, Irena Žmak, Mihone Kerolli Mustafa, Ivana Gabelica. Corrosion Behavior of Amorphous Sol–Gel TiO2–ZrO2 Nano Thickness Film on Stainless Steel. Coatings. 2021; 11 (8):988.
Chicago/Turabian StyleLidija Ćurković; Helena Otmačić Ćurković; Irena Žmak; Mihone Kerolli Mustafa; Ivana Gabelica. 2021. "Corrosion Behavior of Amorphous Sol–Gel TiO2–ZrO2 Nano Thickness Film on Stainless Steel." Coatings 11, no. 8: 988.
In this work, alumina (Al2O3) ceramics were prepared using an environmentally friendly slip casting method. To this end, highly concentrated (70 wt.%) aqueous suspensions of alumina (Al2O3) were prepared with different amounts of the ammonium salt of a polycarboxylic acid, Dolapix CE 64, as an electrosteric dispersant. The stability of highly concentrated Al2O3 aqueous suspensions was monitored by viscosity measurements. Green bodies (ceramics before sintering) were obtained by pouring the stable Al2O3 aqueous suspensions into dry porous plaster molds. The obtained Al2O3 ceramic green bodies were sintered in the electric furnace. Analysis of the effect of three sintering parameters (sintering temperature, heating rate and holding time) on the density of alumina ceramics was performed using the response surface methodology (RSM), based on experimental data obtained according to Box–Behnken experimental design, using the software Design-Expert. From the statistical analysis, linear and nonlinear models with added first-order interaction were developed for prediction and optimization of density-dependent variables: sintering temperature, heating rate and holding time.
Darko Landek; Lidija Ćurković; Ivana Gabelica; Mihone Kerolli Mustafa; Irena Žmak. Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology. Sustainability 2021, 13, 6739 .
AMA StyleDarko Landek, Lidija Ćurković, Ivana Gabelica, Mihone Kerolli Mustafa, Irena Žmak. Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology. Sustainability. 2021; 13 (12):6739.
Chicago/Turabian StyleDarko Landek; Lidija Ćurković; Ivana Gabelica; Mihone Kerolli Mustafa; Irena Žmak. 2021. "Optimization of Sintering Process of Alumina Ceramics Using Response Surface Methodology." Sustainability 13, no. 12: 6739.
This study presents a novel method for the development of TiO2/reduced graphene oxide (rGO) nanocomposites for photocatalytic degradation of dyes in an aqueous solution. The synergistic integration of rGO and TiO2, through the formation of Ti–O–C bonds, offers an interesting opportunity to design photocatalyst nanocomposite materials with the maximum absorption shift to the visible region of the spectra, where photodegradation can be activated not only with UV but also with the visible part of natural solar irradiation. [email protected] nanocomposites with different content of rGO have been self-assembled by the hydrothermal method followed by calcination treatment. The morphological and structural analysis of the synthesized photocatalysts was performed by FTIR, XRD, XPS, UV-Vis DRS, SEM/EDX, and Raman spectroscopy. The effectiveness of the synthesized nanocomposites as photocatalysts was examined through the photodegradation of methylene blue (MB) and rhodamine B (RhB) dye under artificial solar-like radiation. The influence of rGO concentration (5 and 15 wt.%) on TiO2 performance for photodegradation of the different dyes was monitored by UV-Vis spectroscopy. The obtained results showed that the synthesized [email protected] nanocomposites significantly increased the decomposition of RhB and MB compared to the synthesized TiO2 photocatalyst. Furthermore, [email protected] nanocomposite with high contents of rGO (15 wt.%) presented an improved performance in photodegradation of MB (98.1%) and RhB (99.8%) after 120 min of exposition to solar-like radiation. These results could be mainly attributed to the decrease of the bandgap of synthesized [email protected] nanocomposites with the increased contents of rGO. Energy gap (E g) values of nanocomposites are 2.71 eV and 3.03 eV, when pure TiO2 particles have 3.15 eV. These results show the potential of graphene-based TiO2 nanocomposite to be explored as a highly efficient solar light-driven photocatalyst for water purification.
Martina Kocijan; Lidija Ćurković; Davor Ljubas; Katarina Mužina; Ivana Bačić; Tina Radošević; Matejka Podlogar; Igor Bdikin; Gonzalo Otero-Irurueta; María Hortigüela; Gil Gonçalves. Graphene-Based TiO2 Nanocomposite for Photocatalytic Degradation of Dyes in Aqueous Solution under Solar-Like Radiation. Applied Sciences 2021, 11, 3966 .
AMA StyleMartina Kocijan, Lidija Ćurković, Davor Ljubas, Katarina Mužina, Ivana Bačić, Tina Radošević, Matejka Podlogar, Igor Bdikin, Gonzalo Otero-Irurueta, María Hortigüela, Gil Gonçalves. Graphene-Based TiO2 Nanocomposite for Photocatalytic Degradation of Dyes in Aqueous Solution under Solar-Like Radiation. Applied Sciences. 2021; 11 (9):3966.
Chicago/Turabian StyleMartina Kocijan; Lidija Ćurković; Davor Ljubas; Katarina Mužina; Ivana Bačić; Tina Radošević; Matejka Podlogar; Igor Bdikin; Gonzalo Otero-Irurueta; María Hortigüela; Gil Gonçalves. 2021. "Graphene-Based TiO2 Nanocomposite for Photocatalytic Degradation of Dyes in Aqueous Solution under Solar-Like Radiation." Applied Sciences 11, no. 9: 3966.
In the present work, alumina (Al2O3) foam was prepared by the replica method where a polyurethane (PU) foam (30 pores per inch (ppi)) template was impregnated with a 60 wt.% Al2O3 suspension. Sintered Al2O3 foam was used as substrate for the deposition of sol-gel derived titania (TiO2) film using dip coating. For the preparation of TiO2 sol, titanium(IV) isopropoxide (Ti-iPrOH) was used as the precursor. The common problem of qualification and quantification of a crystalline coating on a highly porous 3D substrate with an uneven surface was addressed using a combination of different structural characterization methods. Using Powder X-ray Diffraction (PXRD) and synchrotron Grazing Incidence X-ray Diffraction (GIXRD) on bulk and powdered Al2O3 foam and TiO2-coated Al2O3 foam samples, it was determined Al2O3 foam crystallizes to corundum and coating to anatase, which was also confirmed by Fourier Transformed Infrared Spectroscopy (FTIR). Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM/EDS) revealed the structural and microstructural properties of the substrate and coating. Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) were used to clarify the evolution of the porous microstructure. The Al2O3-TiO2 composite was evaluated as a photocatalyst candidate for the degradation of the micropollutant medication memantine. The degradation rate was monitored using a light-emitting diode (LED) lamp operating at electromagnetic (EM) wavelength of 365 nm. The photocatalytic activity of sol-gel-derived TiO2 film immobilized on the Al2O3 foam was compared with commercially available TiO2 nanoparticles, P25-Degussa, in the form of a suspension. The levels of memantine were monitored by High-Performance Liquid Chromatography–Tandem Mass Spectrometry (HPLC–MS/MS). The efficiency and rate of the memantine photodegradation by suspended TiO2 nanoparticles is higher than the TiO2-coated Al2O3 foam. But, from the practical point of view, TiO2-coated Al2O3 foam is more appropriate as a valuable photocatalytic composite material.
Zrinka Švagelj; Vilko Mandić; Lidija Ćurković; Martina Biošić; Irena Žmak; Mattia Gaborardi. Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction. Materials 2020, 13, 227 .
AMA StyleZrinka Švagelj, Vilko Mandić, Lidija Ćurković, Martina Biošić, Irena Žmak, Mattia Gaborardi. Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction. Materials. 2020; 13 (1):227.
Chicago/Turabian StyleZrinka Švagelj; Vilko Mandić; Lidija Ćurković; Martina Biošić; Irena Žmak; Mattia Gaborardi. 2020. "Titania-Coated Alumina Foam Photocatalyst for Memantine Degradation Derived by Replica Method and Sol-Gel Reaction." Materials 13, no. 1: 227.
Alumina (Al2O3) and zirconia (ZrO2) have good overall properties and thus are widely used oxide technical ceramics. The biggest drawback of Al2O3 is its low fracture toughness. In contrast, ZrO2 is relatively tough, but is also much more expensive. In order to improve the alumina toughness, composite ceramics are being developed. Slip casting technology has economic advantages over the conventional hot isostatic pressure technology, but problems may arise when preparing stable highly-concentrated suspensions (slip) for filling the mold. The purpose of this study is to prepare aqueous suspensions using 70 wt. % α-Al2O3, with 0, 1, 5 and 10 wt. % of added t-ZrO2. Suspensions were electrosterically stabilized using the ammonium salt of polymethylacrylic acid, an alkali-free anionic polyelectrolyte dispersant. Also, magnesium oxide in form of magnesium aluminate spinel (MgAl2O4) was used to inhibit the abnormal alumina grain growth during the sintering process. Minimum viscosities were used as stability estimators, where an increase in ZrO2 content required adding more dispersant. After sintering, the Vickers indentation test was used to determine the hardness and the indentation fracture toughness from the measurement of the crack length. Also, the brittleness index (Bi, μm−1/2) was calculated from values of Vickers hardness and the Vickers indentation fracture toughness. It was found that with increasing ZrO2 content the fracture toughness increased, while the hardness as well as the brittleness index decreased. Zirconia loading reduces the crystallite sizes of alumina, as confirmed by the X-ray diffraction analysis. SEM/EDS analysis showed that ZrO2 grains are distributed in the Al2O3 matrix, forming some agglomerates of ZrO2 and some pores, with ZrO2 having a smaller grain size than Al2O3.
Irena Žmak; Danko Ćorić; Vilko Mandić; Lidija Ćurković. Hardness and Indentation Fracture Toughness of Slip Cast Alumina and Alumina-Zirconia Ceramics. Materials 2019, 13, 122 .
AMA StyleIrena Žmak, Danko Ćorić, Vilko Mandić, Lidija Ćurković. Hardness and Indentation Fracture Toughness of Slip Cast Alumina and Alumina-Zirconia Ceramics. Materials. 2019; 13 (1):122.
Chicago/Turabian StyleIrena Žmak; Danko Ćorić; Vilko Mandić; Lidija Ćurković. 2019. "Hardness and Indentation Fracture Toughness of Slip Cast Alumina and Alumina-Zirconia Ceramics." Materials 13, no. 1: 122.
The green machining of alumina (Al2O3) green bodies generates a certain amount of waste alumina powder. Waste alumina ceramic powder should be disposed of as non-hazardous waste in a legally compliant manner. The influence of additives on the stability of 70 wt.% (≈40 vol.%) alumina-waste alumina water-based suspension was investigated in the presented research. A Box-Behnken three-factor response surface design was used for the preparation of stable highly-concentrated suspensions with the addition of three additives. The optimal amount of each additive was selected according to the obtained results of minimal apparent viscosity: 0.05 wt.% Tiron as dispersant, 0.1 wt.% poly (vinyl alcohol) as binder and 0.2 wt.% magnesium aluminate spinel as abnormal grain growth inhibitor. The analysis of variance was used to identify the contribution of each additive. The zeta potential and sedimentations tests were performed to confirm the suspension stability measurements at different pH values. Alumina particles were optimally dispersed at pH values between 8 and 11. According to the results, the investigated composition of 20 wt.% waste alumina powder (weight content, dry alumina powder), with the addition of optimal amounts of additives, shows a possible application in the production of ceramics by slip casting.
Milan Vukšić; Irena Žmak; Lidija Ćurković; Danko Ćorić. Effect of Additives on Stability of Alumina-Waste Alumina Suspension for Slip Casting: Optimization Using Box-Behnken Design. Materials 2019, 12, 1738 .
AMA StyleMilan Vukšić, Irena Žmak, Lidija Ćurković, Danko Ćorić. Effect of Additives on Stability of Alumina-Waste Alumina Suspension for Slip Casting: Optimization Using Box-Behnken Design. Materials. 2019; 12 (11):1738.
Chicago/Turabian StyleMilan Vukšić; Irena Žmak; Lidija Ćurković; Danko Ćorić. 2019. "Effect of Additives on Stability of Alumina-Waste Alumina Suspension for Slip Casting: Optimization Using Box-Behnken Design." Materials 12, no. 11: 1738.
In this paper, nanostructured TiO2 film was prepared by the by sol-gel process and dip-coating technique with titanium tetraisopropoxide as a precursor. After heat treatment at 550 °C, the deposited film was characterized by means of micro-Raman spectroscopy and atomic force microscopy (AFM). It was found that the TiO2 film consisted of only the TiO2 anatase phase and showed a granular microstructure. Photocatalytic degradation of azithromycin by using sol-gel nanostructured TiO2 film was studied to define the most effective degradation process for potential use in wastewater treatment. Different factors were evaluated during photocatalysis, such as pH (3, 7, and 10), water matrix (ultrapure water and synthetic municipal waste water effluent), influence of another pharmaceutically active compound (sulfamethoxazole, one of the most often detected pharmaceutic compounds in waste waters), and radiation sources (low pressure ultraviolet (UV) mercury lamps with a UV-A and UV-C range; a light-emitting diode (LED) lamp with a radiation peak at 365 nm). The most effective degradation process was achieved with the UV-C irradiation source in matrices at pH 10. The water matrix had little effect on the photocatalytic degradation rates of azithromycin. The presence of sulfamethoxazole in the water matrix decreased the degradation rate of azithromycin, however, only in matrices with a pH level adjusted to 10. During the experiments, five azithromycin degradation products were identified and none of them showed toxic properties, suggesting effective removal of azithromycin. LED 365 nm as the irradiation source was not as effective as the UV-C lamp. Nevertheless, considering the cost, energy efficiency, and environmental aspects of the irradiation source, the LED lamp could be a “real-life” alternative.
Mirta Čizmić; Davor Ljubas; Marko Rožman; Danijela Ašperger; Lidija Ćurković; Sandra Babić. Photocatalytic Degradation of Azithromycin by Nanostructured TiO2 Film: Kinetics, Degradation Products, and Toxicity. Materials 2019, 12, 873 .
AMA StyleMirta Čizmić, Davor Ljubas, Marko Rožman, Danijela Ašperger, Lidija Ćurković, Sandra Babić. Photocatalytic Degradation of Azithromycin by Nanostructured TiO2 Film: Kinetics, Degradation Products, and Toxicity. Materials. 2019; 12 (6):873.
Chicago/Turabian StyleMirta Čizmić; Davor Ljubas; Marko Rožman; Danijela Ašperger; Lidija Ćurković; Sandra Babić. 2019. "Photocatalytic Degradation of Azithromycin by Nanostructured TiO2 Film: Kinetics, Degradation Products, and Toxicity." Materials 12, no. 6: 873.
Pharmaceuticals are present in an aquatic environment usually in low (ng/L) concentrations. Their continuous release can lead to unwanted effects on the nontarget organisms. The main points of their collection and release into the environment are wastewater treatment plants. The wastewater treatment plants should be upgraded by new technologies, like advanced oxidation processes (AOPs), to be able to degrade these new pollutants. In this study, the degradation of albendazole (ALB), a drug against parasitic helminths, was investigated using four UV-based AOPs: UV photolysis, UV photocatalysis (over TiO2 film), UV + O3, and UV + H2O2. The ranking of the degradation process degree of the ALB and its degradation products for studied processes is as follows: UV photolysis < UV photocatalysis with TiO2 < UV + O3 < UV + H2O2. The fastest degradation of ALB and its degradation products was obtained by UV-C + H2O2 process with a degradation efficiency of 99.95%, achieved in 15 minutes.
Davor Ljubas; Mirta Čizmić; Katarina Vrbat; Draženka Stipaničev; Siniša Repec; Lidija Ćurković; Sandra Babić. Albendazole Degradation Possibilities by UV-Based Advanced Oxidation Processes. International Journal of Photoenergy 2018, 2018, 1 -6.
AMA StyleDavor Ljubas, Mirta Čizmić, Katarina Vrbat, Draženka Stipaničev, Siniša Repec, Lidija Ćurković, Sandra Babić. Albendazole Degradation Possibilities by UV-Based Advanced Oxidation Processes. International Journal of Photoenergy. 2018; 2018 ():1-6.
Chicago/Turabian StyleDavor Ljubas; Mirta Čizmić; Katarina Vrbat; Draženka Stipaničev; Siniša Repec; Lidija Ćurković; Sandra Babić. 2018. "Albendazole Degradation Possibilities by UV-Based Advanced Oxidation Processes." International Journal of Photoenergy 2018, no. : 1-6.
Mirta Čizmić; Davor Ljubas; Irena Škorić; Marko Rožman; Danijela Asperger; Lidija Curkovic; Mira Petrović; Sandra Babic. Photolytic and photocatalytic degradation of febantel in aqueous media. DESALINATION AND WATER TREATMENT 2018, 104, 294 -303.
AMA StyleMirta Čizmić, Davor Ljubas, Irena Škorić, Marko Rožman, Danijela Asperger, Lidija Curkovic, Mira Petrović, Sandra Babic. Photolytic and photocatalytic degradation of febantel in aqueous media. DESALINATION AND WATER TREATMENT. 2018; 104 ():294-303.
Chicago/Turabian StyleMirta Čizmić; Davor Ljubas; Irena Škorić; Marko Rožman; Danijela Asperger; Lidija Curkovic; Mira Petrović; Sandra Babic. 2018. "Photolytic and photocatalytic degradation of febantel in aqueous media." DESALINATION AND WATER TREATMENT 104, no. : 294-303.
The suitability of chicken eggshell as a novel sorbent for removal of pharmaceuticals (dexamethasone (DEX), febantel (FEB), praziquantel (PRAZ), procaine (PROC), and tylosin (TYL)) from water is investigated. Batch sorption experiments are performed to detect the effect of the initial concentration of pharmaceuticals, contact time, and temperature on the eggshell sorption capacity. The eggshell sample is characterized using Fourier transform IR spectroscopy, scanning electron microscopy combined with energy dispersive spectroscopy, and with particle and pore size distribution analyses. Equilibrium data are analyzed using Freundlich and Dubinin–Radushkevich isotherms. The thermodynamic parameters (ΔG°, ΔH°, and ΔS°) are calculated in order to predict the sorption nature. The results indicate that the sorption process is spontaneous and exothermic for PROC; spontaneous and endothermic for DEX, FEB, TYL; and non-spontaneous and exothermic for PRAZ. According to the experimental results, chicken eggshell as mesoporous sorbent can be successfully used as an alternative and low-cost biosorbent. The kinetic experimental data are fitted by Lagergren's and Ho's pseudo-second-order model. Kinetic parameters, rate constants, equilibrium sorption capacities, and correlation coefficients are estimated and discussed for both kinetic models. The pseudo-second-order model is suitable for prediction of sorption capacities. The mechanism of the sorption process is determined by the Weber–Morris intraparticle diffusion model and Boyd model. The sorption rate of investigated pharmaceuticals to chicken eggshells is influenced by both diffusion types: intraparticle and film diffusion.
Dragana Mutavdžić Pavlović; Lidija Ćurković; Jelena Macan; Krunoslav Žižek. Eggshell as a New Biosorbent for the Removal of Pharmaceuticals From Aqueous Solutions. CLEAN – Soil, Air, Water 2017, 45, 1700082 .
AMA StyleDragana Mutavdžić Pavlović, Lidija Ćurković, Jelena Macan, Krunoslav Žižek. Eggshell as a New Biosorbent for the Removal of Pharmaceuticals From Aqueous Solutions. CLEAN – Soil, Air, Water. 2017; 45 (12):1700082.
Chicago/Turabian StyleDragana Mutavdžić Pavlović; Lidija Ćurković; Jelena Macan; Krunoslav Žižek. 2017. "Eggshell as a New Biosorbent for the Removal of Pharmaceuticals From Aqueous Solutions." CLEAN – Soil, Air, Water 45, no. 12: 1700082.
Sandra Babic; Lidija Ćurković; Davor Ljubas; Mirta Čizmić. TiO 2 assisted photocatalytic degradation of macrolide antibiotics. Current Opinion in Green and Sustainable Chemistry 2017, 6, 34 -41.
AMA StyleSandra Babic, Lidija Ćurković, Davor Ljubas, Mirta Čizmić. TiO 2 assisted photocatalytic degradation of macrolide antibiotics. Current Opinion in Green and Sustainable Chemistry. 2017; 6 ():34-41.
Chicago/Turabian StyleSandra Babic; Lidija Ćurković; Davor Ljubas; Mirta Čizmić. 2017. "TiO 2 assisted photocatalytic degradation of macrolide antibiotics." Current Opinion in Green and Sustainable Chemistry 6, no. : 34-41.
In this study, an anthelmintic drug, praziquantel(PZQ), was degraded using the direct photolysis, photocatalysis, and oxidation processes including UV radiation, TiO2 film, and hydrogen peroxide. The photolytic degradation with predominant wavelengths of 185/254nm (UV-C) proved to be more efficient with a half-life of 3.13min compared to the radiation of 365nm (UV-A) where the degradation did not occur. In order to enhance the rate of PZQ photolytic degradation, H2O2 was added, which resulted in two to three times higher degradation rates. In the photocatalytic degradation, TiO2 film was used as catalyst. The degradation was ten times faster in the photocatalytic experiments where UV-C light (k=0.2390min(-1)) was used than in those with UV-A (k=0.0201min(-1)). Comparing the results from all performed experiments it can be concluded that the UV-C/TiO2/H2O2 process yielded the highest degradation rate and complete degradation of PZQ was obtained in less than 7min. The degradation of PZQ followed the first order kinetics in all the experiments. The photo degradation was inhibited in the presence of methanol. The degradation pathways and the structural formulae of five degradation products (m/z 273, 269, 189, 147, 132) were proposed based on the liquid chromatography tandem mass spectrometry analysis.
Mirta Čizmić; Davor Ljubas; Lidija Ćurković; Irena Škorić; Sandra Babic. Kinetics and degradation pathways of photolytic and photocatalytic oxidation of the anthelmintic drug praziquantel. Journal of Hazardous Materials 2017, 323, 500 -512.
AMA StyleMirta Čizmić, Davor Ljubas, Lidija Ćurković, Irena Škorić, Sandra Babic. Kinetics and degradation pathways of photolytic and photocatalytic oxidation of the anthelmintic drug praziquantel. Journal of Hazardous Materials. 2017; 323 ():500-512.
Chicago/Turabian StyleMirta Čizmić; Davor Ljubas; Lidija Ćurković; Irena Škorić; Sandra Babic. 2017. "Kinetics and degradation pathways of photolytic and photocatalytic oxidation of the anthelmintic drug praziquantel." Journal of Hazardous Materials 323, no. : 500-512.
Reverse indentation size effect of a duplex steel
M. Majic Renjo; V. Rede; L. Ćurković. Reverse indentation size effect of a duplex steel. Metallic Materials 2016, 52, 299 -304.
AMA StyleM. Majic Renjo, V. Rede, L. Ćurković. Reverse indentation size effect of a duplex steel. Metallic Materials. 2016; 52 (5):299-304.
Chicago/Turabian StyleM. Majic Renjo; V. Rede; L. Ćurković. 2016. "Reverse indentation size effect of a duplex steel." Metallic Materials 52, no. 5: 299-304.
Two nanostructured sol–gel TiO2 films were prepared on a glass substrate by means of the dip-coating technique with titanium (IV) isopropoxide as a precursor with and without the addition of polyethylene glycol (PEG) as a structure-directing agent. The synthesized films were characterized by using thermal gravimetry, differential scanning calorimetry, micro-Raman spectroscopy, and atomic force microscopy (AFM). Results of the AFM analysis revealed that both films are nanostructured and that the TiO2 film prepared with the addition of PEG has higher values of roughness. The photocatalytic activity of the films was evaluated by the photocatalytic degradation of the methyl orange monoazo dye and the congo red diazo dye with predominant radiation wavelengths of 365 nm (UV-A) and 254 nm (UV-C). The effects of temperature (17.5, 25 and 35 °C) on the film stability and on the degradation process were also followed. The TiO2 film created with the addition of PEG showed heightened photoactivity at all reaction temperatures and higher degradation rates of both dyes were observed with the UV-C than with the UV-A radiation. In some cases, the total decolorization process was complete in 90 or 120 min, but the total mineralization of the dye solutions was not achieved after 120 min. The TiO2 films were stable at all three temperatures after more than 50 working hours. The degradation processes of dyes were monitored by means of the UV/VIS spectrophotometry and the liquid chromatography mass spectrometry together with the total organic carbon.
Davor Ljubas; Lidija Ćurković; Veronika Marinović; Ivana Bačić; Branka Tavčar. Photocatalytic degradation of azo dyes by sol–gel TiO2 films: effects of polyethylene glycol addition, reaction temperatures and irradiation wavelengths. Reaction Kinetics, Mechanisms and Catalysis 2015, 116, 563 -576.
AMA StyleDavor Ljubas, Lidija Ćurković, Veronika Marinović, Ivana Bačić, Branka Tavčar. Photocatalytic degradation of azo dyes by sol–gel TiO2 films: effects of polyethylene glycol addition, reaction temperatures and irradiation wavelengths. Reaction Kinetics, Mechanisms and Catalysis. 2015; 116 (2):563-576.
Chicago/Turabian StyleDavor Ljubas; Lidija Ćurković; Veronika Marinović; Ivana Bačić; Branka Tavčar. 2015. "Photocatalytic degradation of azo dyes by sol–gel TiO2 films: effects of polyethylene glycol addition, reaction temperatures and irradiation wavelengths." Reaction Kinetics, Mechanisms and Catalysis 116, no. 2: 563-576.
This paper deals with the photolytic and the photocatalytic degradation of sulfonamide antibiotic sulfamethazine (SMT) dissolved in Milli-Q water and in synthetic wastewater. Besides the direct photolysis, oxidation processes including UV/H2O2, UV/TiO2, and UV/TiO2/H2O2 using UV-A and UV-C radiation were investigated. Pseudo-first-order kinetics was observed for the degradation of SMT in all investigated processes. Additions of an electron acceptor (H2O2) and a catalyst (TiO2 film) accelerated the photolytic degradation of SMT for both the UV-A- and the UV-C-based processes. The most efficient process was UV-C/TiO2/H2O2 with complete degradation of SMT obtained in 10 min. The UV-A-based processes have been less efficient in terms of irradiation time required to totally degrade SMT than the UV-C-based processes. It was also confirmed that different wastewater components can significantly reduce the degradation rate of SMT. An almost ninefold reduction in the rate constant of SMT was observed for the specific synthetic wastewater. Although UV-A radiation experiments need more time and energy (2.7 times more electrical energy was consumed per gram of demineralized SMT) than UV-C experiments, they have a potential for practical use since natural UV-A solar radiation could be used here, which lowers the overall cost of the treatment. Five degradation products were detected during the degradation processes, and their structural formulae are presented. The structural formulae were elucidated based on mass spectra fragmentation pattern obtained using the tandem mass spectrometry (MS/MS) and NMR analysis.
Sandra Babić; Mirta Zrnčić; Davor Ljubas; Lidija Ćurković; Irena Škorić. Photolytic and thin TiO2 film assisted photocatalytic degradation of sulfamethazine in aqueous solution. Environmental Science and Pollution Research 2015, 22, 11372 -11386.
AMA StyleSandra Babić, Mirta Zrnčić, Davor Ljubas, Lidija Ćurković, Irena Škorić. Photolytic and thin TiO2 film assisted photocatalytic degradation of sulfamethazine in aqueous solution. Environmental Science and Pollution Research. 2015; 22 (15):11372-11386.
Chicago/Turabian StyleSandra Babić; Mirta Zrnčić; Davor Ljubas; Lidija Ćurković; Irena Škorić. 2015. "Photolytic and thin TiO2 film assisted photocatalytic degradation of sulfamethazine in aqueous solution." Environmental Science and Pollution Research 22, no. 15: 11372-11386.
The purpose of this study was to investigate and analyze the indentation size effect (ISE) in Vickers hardness of monolithic yttria partially stabilized zirconia (Y-TZP) dental ceramics without and with the addition of dental dye A3. The ISE is analyzed using the Mayer law, a proportional specimen resistance (PSR) model and a modified proportional specimen resistance (MPSR) model. Two samples of Y-TZP dental ceramics, trade names BruxZir (provided by Glidewell Laboratories, CA, USA), were investigated. The first sample was polished Y-TZP and the second sample was polished Y-TZP with the addition of dental dye A3, by VITA Classical Shade Guide. The Vickers hardness was measured under the following loads: 0.49N, 0.98N, 1.96N, 4.90, 9.81N and 29.42N. Thirty indentations were made on each sample, under each load. Relationships between the applied load, F, and the resulting indentation size, d, have been analyzed by the Mayer law, the PSR model and the MPSR model. The Meyer index (n) for both Y-TZP dental ceramics is less than 2, which indicates that hardness is dependent on test loads. The PSR model and the MPSR model were used to calculate "true" Vickers hardness or load-independent hardness. All applied mathematical models are suitable for the data analysis, which is confirmed with high correlation coefficients, but the best correlation between measured values and mathematical models was achieved with the MPSR model with a correlation coefficient of 0.9999.
Marijana Majić Renjo; Lidija Ćurković; Sanja Štefančić; Danko Ćorić. Indentation size effect of Y-TZP dental ceramics. Dental Materials 2014, 30, e371 -e376.
AMA StyleMarijana Majić Renjo, Lidija Ćurković, Sanja Štefančić, Danko Ćorić. Indentation size effect of Y-TZP dental ceramics. Dental Materials. 2014; 30 (12):e371-e376.
Chicago/Turabian StyleMarijana Majić Renjo; Lidija Ćurković; Sanja Štefančić; Danko Ćorić. 2014. "Indentation size effect of Y-TZP dental ceramics." Dental Materials 30, no. 12: e371-e376.
Lidija Ćurković; Davor Ljubas; Suzana Šegota; Ivana Bačić. Photocatalytic degradation of Lissamine Green B dye by using nanostructured sol–gel TiO2 films. Journal of Alloys and Compounds 2014, 604, 309 -316.
AMA StyleLidija Ćurković, Davor Ljubas, Suzana Šegota, Ivana Bačić. Photocatalytic degradation of Lissamine Green B dye by using nanostructured sol–gel TiO2 films. Journal of Alloys and Compounds. 2014; 604 ():309-316.
Chicago/Turabian StyleLidija Ćurković; Davor Ljubas; Suzana Šegota; Ivana Bačić. 2014. "Photocatalytic degradation of Lissamine Green B dye by using nanostructured sol–gel TiO2 films." Journal of Alloys and Compounds 604, no. : 309-316.
M. Kerolli-Mustafa; I. Bačić; L. Ćurković. Investigation of jarosite process tailing waste by means of raman and infrared spectroscopy. Materialwissenschaft und Werkstofftechnik 2013, 44, 768 -773.
AMA StyleM. Kerolli-Mustafa, I. Bačić, L. Ćurković. Investigation of jarosite process tailing waste by means of raman and infrared spectroscopy. Materialwissenschaft und Werkstofftechnik. 2013; 44 (9):768-773.
Chicago/Turabian StyleM. Kerolli-Mustafa; I. Bačić; L. Ćurković. 2013. "Investigation of jarosite process tailing waste by means of raman and infrared spectroscopy." Materialwissenschaft und Werkstofftechnik 44, no. 9: 768-773.
M. Majić Renjo; M. Lalić; L. Ćurković; G. Matijašic. Rheological properties of aqueous alumina suspensions. Materialwissenschaft und Werkstofftechnik 2012, 43, 979 -983.
AMA StyleM. Majić Renjo, M. Lalić, L. Ćurković, G. Matijašic. Rheological properties of aqueous alumina suspensions. Materialwissenschaft und Werkstofftechnik. 2012; 43 (11):979-983.
Chicago/Turabian StyleM. Majić Renjo; M. Lalić; L. Ćurković; G. Matijašic. 2012. "Rheological properties of aqueous alumina suspensions." Materialwissenschaft und Werkstofftechnik 43, no. 11: 979-983.