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In the last years of research on new anode materials for advanced Lithium-Ion Batteries (LIBs), niobium-based oxides are raising growing attention due to very high theoretical capacities and high working potential that can prevent the formation of lithium dendrites, ensuring the safety of the batteries. Most of them crystallizes in open Wadsley–Roth shear structures, which show large Li-ion diffusion coefficients and promising applications in energy storage systems. In this paper, the complex structural and electrochemical features of FeNb11O29 are unravelled with in situ Raman Spectroscopy, operando X-Ray Diffraction and electrochemical techniques. The intrinsic pseudocapacitance shown by the iron niobate is correlated to large channels in its structure that cause weak Li+-host interactions and very little charge-transfer resistances. The symmetrisation of the octahedral framework that occurs after the reduction of Nb5+ cations, detected for the first time, seems to be the key of the electrochemistry of FeNb11O29, which shows excellent features for advanced high-power density LIBs.
Daniele Spada; Benedetta Albini; Pietro Galinetto; Daniele Versaci; Carlotta Francia; Silvia Bodoardo; Giorgio Bais; Marcella Bini. FeNb11O29, anode material for high-power lithium-ion batteries: Pseudocapacitance and symmetrisation unravelled with advanced electrochemical and in situ/operando techniques. Electrochimica Acta 2021, 393, 139077 .
AMA StyleDaniele Spada, Benedetta Albini, Pietro Galinetto, Daniele Versaci, Carlotta Francia, Silvia Bodoardo, Giorgio Bais, Marcella Bini. FeNb11O29, anode material for high-power lithium-ion batteries: Pseudocapacitance and symmetrisation unravelled with advanced electrochemical and in situ/operando techniques. Electrochimica Acta. 2021; 393 ():139077.
Chicago/Turabian StyleDaniele Spada; Benedetta Albini; Pietro Galinetto; Daniele Versaci; Carlotta Francia; Silvia Bodoardo; Giorgio Bais; Marcella Bini. 2021. "FeNb11O29, anode material for high-power lithium-ion batteries: Pseudocapacitance and symmetrisation unravelled with advanced electrochemical and in situ/operando techniques." Electrochimica Acta 393, no. : 139077.
ZnFe2O4 nanoparticles are an amazing class of materials whose magnetic features are particularly appealing for the biomedical field. Their key property is the superparamagnetic behaviour at room temperature, strictly dependent on particle sizes values and cation distribution on the spinel sites, easily tuneable by substitution of dopants and by proper synthesis methods. In this paper, we focused on the undoped and Mg (on Zn site) and/or Ga (on Fe site) substituted ferrites synthesized by co-precipitation route. XRPD, SEM and Micro-Raman techniques allowed us to ensure the good quality of the samples, to determine the dopants location into spinel lattice and to estimate an average crystallite size of about 5 nm. A superparamagnetic behaviour with maxima magnetization values at room temperature between 4 and 7 emu/g at the highest applied magnetic field of 1T was disclosed, as well as a clear dependence of the blocking temperature on the cationic disorder within the two sublattices, which strengthens the magnetic interactions thus moving the transition to an ordered blocked state at higher temperatures. The electron paramagnetic resonance inspection confirmed the superparamagnetic behavior, excluding extrinsic contribution from iron oxides phases, so demonstrating that the magnetic properties depend on the inversion degree, related to the structural disorder, of the spinel phase.
Gianluca Gazzola; Marco Ambrosetti; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Marcella Bini. Tuning the superparamagnetic effect in ZnFe2O4 nanoparticles with Mg, Ga doping. Materials Chemistry and Physics 2021, 273, 125069 .
AMA StyleGianluca Gazzola, Marco Ambrosetti, Maria Cristina Mozzati, Benedetta Albini, Pietro Galinetto, Marcella Bini. Tuning the superparamagnetic effect in ZnFe2O4 nanoparticles with Mg, Ga doping. Materials Chemistry and Physics. 2021; 273 ():125069.
Chicago/Turabian StyleGianluca Gazzola; Marco Ambrosetti; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Marcella Bini. 2021. "Tuning the superparamagnetic effect in ZnFe2O4 nanoparticles with Mg, Ga doping." Materials Chemistry and Physics 273, no. : 125069.
Layered NaNi0.5Mn0.5O2, employed as cathode materials in sodium ion batteries, is attracting interest due to its high working potential and high-capacity values, thanks to the big sodium amount hosted in the lattice. Many issues are, however, related to their use, particularly, the complex phase transitions occurring during sodium intercalation/deintercalation, detrimental for the structure stability, and the possible Mn dissolution into the electrolyte. In this paper, the doping with Ti, V, and Cu ions (10% atoms with respect to Ni/Mn amount) was used to stabilize different polymorphs or mixtures of them with the aim to improve the capacity values and cells cyclability. The phases were identified and quantified by means of X-ray powder diffraction with Rietveld structural refinements. Complex voltammograms with broad peaks, due to multiple structural transitions, were disclosed for most of the samples. Ti-doped sample has, in general, the best performances with the highest capacity values (120 mAh/g at C/10), however, at higher currents (1C), Cu-substituted sample also has stable and comparable capacity values.
Francesco Leccardi; Davide Nodari; Daniele Spada; Marco Ambrosetti; Marcella Bini. Synergistic Effect of Polymorphs in Doped NaNi0.5Mn0.5O2 Cathode Material for Improving Electrochemical Performances in Na-Batteries. Electrochem 2021, 2, 335 -346.
AMA StyleFrancesco Leccardi, Davide Nodari, Daniele Spada, Marco Ambrosetti, Marcella Bini. Synergistic Effect of Polymorphs in Doped NaNi0.5Mn0.5O2 Cathode Material for Improving Electrochemical Performances in Na-Batteries. Electrochem. 2021; 2 (2):335-346.
Chicago/Turabian StyleFrancesco Leccardi; Davide Nodari; Daniele Spada; Marco Ambrosetti; Marcella Bini. 2021. "Synergistic Effect of Polymorphs in Doped NaNi0.5Mn0.5O2 Cathode Material for Improving Electrochemical Performances in Na-Batteries." Electrochem 2, no. 2: 335-346.
Spinel phases, with unique and outstanding physical properties, are attracting a great deal of interest in many fields. In particular, MgFe2O4, a partially inverted spinel phase, could find applications in medicine thanks to the remarkable antibacterial properties attributed to the generation of reactive oxygen species. In this paper, undoped and Ag-doped MgFe2-xAgxO4 (x = 0.1 and 0.3) nanoparticles were prepared using microwave-assisted combustion and sol–gel methods. X-ray powder diffraction, with Rietveld structural refinements combined with micro-Raman spectroscopy, allowed to determine sample purity and the inversion degree of the spinel, passing from about 0.4 to 0.7 when Ag was introduced as dopant. The results are discussed in view of the antibacterial activity towards Escherichia coli and Staphylococcus aureus, representative strains of Gram-negative and Gram-positive bacteria. The sol–gel particles were more efficient towards the chosen bacteria, possibly thanks to the nanometric sizes of metallic silver, which were well distributed in the powders and in the spinel phase, with respect to microwave ones, that, however, acquired antibacterial activity after thermal treatment, probably due to the nucleation of hematite, itself displaying well-known antibacterial properties and which could synergistically act with silver and spinel.
Erika Fantozzi; Erlinda Rama; Cinzia Calvio; Benedetta Albini; Pietro Galinetto; Marcella Bini. Silver Doped Magnesium Ferrite Nanoparticles: Physico-Chemical Characterization and Antibacterial Activity. Materials 2021, 14, 2859 .
AMA StyleErika Fantozzi, Erlinda Rama, Cinzia Calvio, Benedetta Albini, Pietro Galinetto, Marcella Bini. Silver Doped Magnesium Ferrite Nanoparticles: Physico-Chemical Characterization and Antibacterial Activity. Materials. 2021; 14 (11):2859.
Chicago/Turabian StyleErika Fantozzi; Erlinda Rama; Cinzia Calvio; Benedetta Albini; Pietro Galinetto; Marcella Bini. 2021. "Silver Doped Magnesium Ferrite Nanoparticles: Physico-Chemical Characterization and Antibacterial Activity." Materials 14, no. 11: 2859.
The conversion-alloying compounds have been identified as promising anode materials for sodium ion batteries (SIBs). One of them, SnO2, with an enormous theoretical capacity of 1558 mAh g−1 is an interesting candidate, also due to its low cost, environmental friendliness and wide availability of tin. However, many drawbacks limit its application in commercial batteries. In this paper, SnO2 has been synthesized from cheap reagents by using simple and easily scalable coprecipitation synthesis routes obtaining nanoparticles with sizes between 2 and 14 nm with almost spherical morphologies. The reasons of the failure of the alloying/de-alloying process were investigated by combining the results obtained from common electrochemical techniques, providing useful examples for the investigation of every material with analogous electrochemical features. Thanks to cyclic voltammetry, different reaction paths were detected for the two samples. The first cycle irreversibility was well characterized with electrochemical impedance spectroscopy, showing interesting trends in the values of the resistance. Galvanostatic cycling with potential limitations was employed to quantify the irreversibility, finding out that the most crystalline sample reached the terminal phase in the Sn-Na system (Na15Sn4), while the least crystalline sample could not achieve such a result (Na3Sn). The crystallinity of SnO2 was determined to be a key parameter, often neglected, for the realization of satisfactory anode compounds.
Daniele Spada; Stefania Davino; Alessandro Girella; Chiara Milanese; Marcella Bini. Inside the failure mechanism of tin oxide as anode for sodium ion batteries. Journal of Solid State Electrochemistry 2021, 25, 1401 -1410.
AMA StyleDaniele Spada, Stefania Davino, Alessandro Girella, Chiara Milanese, Marcella Bini. Inside the failure mechanism of tin oxide as anode for sodium ion batteries. Journal of Solid State Electrochemistry. 2021; 25 (4):1401-1410.
Chicago/Turabian StyleDaniele Spada; Stefania Davino; Alessandro Girella; Chiara Milanese; Marcella Bini. 2021. "Inside the failure mechanism of tin oxide as anode for sodium ion batteries." Journal of Solid State Electrochemistry 25, no. 4: 1401-1410.
The search for highly performing cathode materials for sodium batteries is a fascinating topic. Unfortunately, Na0.44MnO2 (NMO), the well-known cathode material with good electrochemical performances, suffers from structural degradation due to reduction of Mn4+ to the Jahn–Teller Mn3+ ion, limiting the long-term cyclability. The cation substitution can be a useful way to mitigate the problem, thanks to the possible stabilization of mixtures of different polymorphs. In this paper, NMO was first substituted with Fe ions, obtaining Na0.44Mn0.5Fe0.5O2, with layered structure, then Al, Si and Cu (10% atom) were substituted on both Mn and Fe ions. Mixtures of P3 type phases, in different amount depending on dopant, were obtained and quantified by Rietveld refinements, and relationships between chemical composition, polymorph type and morphology were proposed. Cyclic voltammetry showed broad peaks, due to the complex structural transitions consequent to the intercalation/deintercalation of sodium. Charge discharge cycles disclosed the superior performances of Cu doped sample, which also benefits from improved air stability, a well-known issue of layered compounds. Discharge capacity values of about 63 mAh/g were detected at 1C, and after 50 cycles at C/2, capacities of about 80 mAh/g are obtained, with a capacity retention of 86%.
Michele Nuti; Daniele Spada; Irene Quinzeni; Stefano Capelli; Benedetta Albini; Pietro Galinetto; Marcella Bini. From tunnel NMO to layered polymorphs oxides for sodium ion batteries. SN Applied Sciences 2020, 2, 1 -13.
AMA StyleMichele Nuti, Daniele Spada, Irene Quinzeni, Stefano Capelli, Benedetta Albini, Pietro Galinetto, Marcella Bini. From tunnel NMO to layered polymorphs oxides for sodium ion batteries. SN Applied Sciences. 2020; 2 (11):1-13.
Chicago/Turabian StyleMichele Nuti; Daniele Spada; Irene Quinzeni; Stefano Capelli; Benedetta Albini; Pietro Galinetto; Marcella Bini. 2020. "From tunnel NMO to layered polymorphs oxides for sodium ion batteries." SN Applied Sciences 2, no. 11: 1-13.
GdFeO3 perovskite attracted large interest in different fields thanks to peculiar magnetic and optical properties that are further tunable by means of doping processes and achievable on both Gd and Fe sites or by properly choosing the synthesis routes. In this paper, nanometric GdFeO3 compounds, undoped and doped with diamagnetic Ca2+ and Mg2+ ions, were synthesized by microwave assisted, sol–gel, and polyol syntheses and characterized by X-ray diffraction, showing solid solutions formation. Raman spectroscopy allowed us to confirm, from peak enlargements, the Ca and Mg substitution on Gd and Fe sites, respectively. The magnetic data showed the presence of magnetic domains as consequence of doping with diamagnetic ions, which seem to play a crucial role in the magnetic activity of the compounds. A superparamagnetic behaviour is evidenced; nevertheless, its intrinsic character is not definitely demonstrated. Indeed, the possible presence of traces of magnetic impurities, which are easily obtainable in these samples, such as iron oxides, must be taken into account.
Antonia Ruffo; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Marcella Bini. Role of non-magnetic dopants (Ca, Mg) in GdFeO3 perovskite nanoparticles obtained by different synthetic methods: structural, morphological and magnetic properties. Journal of Materials Science: Materials in Electronics 2020, 31, 18263 -18277.
AMA StyleAntonia Ruffo, Maria Cristina Mozzati, Benedetta Albini, Pietro Galinetto, Marcella Bini. Role of non-magnetic dopants (Ca, Mg) in GdFeO3 perovskite nanoparticles obtained by different synthetic methods: structural, morphological and magnetic properties. Journal of Materials Science: Materials in Electronics. 2020; 31 (20):18263-18277.
Chicago/Turabian StyleAntonia Ruffo; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Marcella Bini. 2020. "Role of non-magnetic dopants (Ca, Mg) in GdFeO3 perovskite nanoparticles obtained by different synthetic methods: structural, morphological and magnetic properties." Journal of Materials Science: Materials in Electronics 31, no. 20: 18263-18277.
Layered double hydroxides (LDHs) are widely used as inorganic hosts for different applications, in particular for drug delivery. Piretanide, a poorly soluble diuretic drug, could benefit of the association with LDH for improving the dissolution rate and also for limiting the gastric irritation after its repeated administration thanks to natural antacid properties of LDH. In this paper, the hybrids compounds Piretanide-Mg3Al-LDH and Zn3Al-LDH were synthesized by co-precipitation method. The first proofs to demonstrate the successful intercalation came from X-ray powder diffraction (from hydroxide layers expansion with respect to LDH-carbonate), thermal analysis (from the absence of drug melting point in the hybrid compound) and infrared spectroscopy (from the absence of the carboxylic acid vibration in the hybrid). In addition, SEM microscopy/EDS microanalysis supported the formation of new entities. Both compounds showed a significant improvement of the drug dissolution rate, compared to the active alone, in biorelevant conditions simulating the oral administration.
Marianna Guagliano; Francesco Monteforte; Giovanna Bruni; Valeria Friuli; Lauretta Maggi; Irene Quinzeni; Marcella Bini. The peculiar dissolution behaviour of Piretanide hosted in layered double hydroxides. Applied Clay Science 2020, 198, 105826 .
AMA StyleMarianna Guagliano, Francesco Monteforte, Giovanna Bruni, Valeria Friuli, Lauretta Maggi, Irene Quinzeni, Marcella Bini. The peculiar dissolution behaviour of Piretanide hosted in layered double hydroxides. Applied Clay Science. 2020; 198 ():105826.
Chicago/Turabian StyleMarianna Guagliano; Francesco Monteforte; Giovanna Bruni; Valeria Friuli; Lauretta Maggi; Irene Quinzeni; Marcella Bini. 2020. "The peculiar dissolution behaviour of Piretanide hosted in layered double hydroxides." Applied Clay Science 198, no. : 105826.
The use of nanohybrids containing cationic or anionic inorganic compounds, seems particularly promising as efficient strategy for drug delivery. In fact, the inorganic counterions usually present in the host can be easily exchanged with drug molecules, from antitumor to anti-inflammatory, antibiotics and vitamins, giving rise to composites with improved solubility. An interesting inorganic host emerging for different applications, from catalysis to water purification up to pharmaceutics, is the layered double hydroxide (LDH) possessing a sheets structure and formula [\({\text{M}}_{{1 - {\text{x}}}}^{2 + }\)\({\text{M}}_{\text{x}}^{3 + }\) (OH)2](An−)x/n yH2O (M2+ = Zn, Mg; M3+ = Al; An− = nitrates, carbonates, chlorides). In this paper, we synthesize by co-precipitation and reconstruction methods the hybrid compound Meloxicam-Zn3Al-LDH, particularly useful for a poorly soluble anti-inflammatory drug. The effective drug intercalation into LDH was verified through X-ray powder diffraction, thermal measurement and infrared spectroscopy. In addition, microscopy/microanalysis supported the formation of new entities. The dissolution tests clearly demonstrate an amazing improvement of the drug release rate with respect to marketed compounds when meloxicam is in the form of hybrid compound.
Francesco Monteforte; Giovanna Bruni; Irene Quinzeni; Valeria Friuli; Lauretta Maggi; Doretta Capsoni; Marcella Bini. Meloxicam-LDH Hybrid Compound: A Successful Strategy to Improve Solubility. Journal of Inorganic and Organometallic Polymers and Materials 2019, 30, 637 -648.
AMA StyleFrancesco Monteforte, Giovanna Bruni, Irene Quinzeni, Valeria Friuli, Lauretta Maggi, Doretta Capsoni, Marcella Bini. Meloxicam-LDH Hybrid Compound: A Successful Strategy to Improve Solubility. Journal of Inorganic and Organometallic Polymers and Materials. 2019; 30 (3):637-648.
Chicago/Turabian StyleFrancesco Monteforte; Giovanna Bruni; Irene Quinzeni; Valeria Friuli; Lauretta Maggi; Doretta Capsoni; Marcella Bini. 2019. "Meloxicam-LDH Hybrid Compound: A Successful Strategy to Improve Solubility." Journal of Inorganic and Organometallic Polymers and Materials 30, no. 3: 637-648.
Marcella Bini; Irene Quinzeni; Daniele Spada. The Doping of FeNb 11 O 29 as a Way to Improve Its Electrochemical Performances. ChemistrySelect 2019, 4, 5656 -5661.
AMA StyleMarcella Bini, Irene Quinzeni, Daniele Spada. The Doping of FeNb 11 O 29 as a Way to Improve Its Electrochemical Performances. ChemistrySelect. 2019; 4 (19):5656-5661.
Chicago/Turabian StyleMarcella Bini; Irene Quinzeni; Daniele Spada. 2019. "The Doping of FeNb 11 O 29 as a Way to Improve Its Electrochemical Performances." ChemistrySelect 4, no. 19: 5656-5661.
FeNb11O29, pure or doped with metal transition ions, is a very promising material with advanced multifunctionalities and interesting applicative perspectives. It is isostructural with Nb12O29, one of the rare compounds in which Nb displays a local magnetic moment and shows both antiferromagnetic ordering and metallic conductivity at low temperatures. In this work we have synthesized and studied Fe0.8V0.2Nb11O29 monoclinic powders. In particular we monitored the effects on structural, electronic and magnetic properties in samples produced in different atmospheres to stabilize cations with different oxidation states. We have demonstrated that the reaction atmosphere influences the phase homogeneity, the crystallite size and the amount of paramagnetic centres, with a transformation of Fe3+ in Fe2+ when an inert atmosphere is used, as proved by the absence, in this case, of any electron paramagnetic resonance signal. Also the Raman spectra result to be affected due to the change of coordination polyhedra. Subsequent re-oxidation of reduced powders brings to the monophasic iron niobate again containing Fe3+ demonstrating the reversibility of redox process. This reversibility is accompanied by a complete restoring of monoclinic structure evidenced by X-ray diffraction data and by Raman measurements, which allowed also to follow in situ the spectral changes induced by laser heating.
Pietro Galinetto; Daniele Spada; Maria Cristina Mozzati; Benedetta Albini; Marcella Bini. Effects of reaction atmosphere on physico-chemical properties of V-doped FeNb11O29. Optical Materials 2019, 92, 373 -378.
AMA StylePietro Galinetto, Daniele Spada, Maria Cristina Mozzati, Benedetta Albini, Marcella Bini. Effects of reaction atmosphere on physico-chemical properties of V-doped FeNb11O29. Optical Materials. 2019; 92 ():373-378.
Chicago/Turabian StylePietro Galinetto; Daniele Spada; Maria Cristina Mozzati; Benedetta Albini; Marcella Bini. 2019. "Effects of reaction atmosphere on physico-chemical properties of V-doped FeNb11O29." Optical Materials 92, no. : 373-378.
Marcella Bini; Francesco Monteforte; Irene Quinzeni; Valeria Friuli; Lauretta Maggi; Giovanna Bruni. Hybrid compounds for improving drugs solubility: Synthesis, physico-chemical and pharmaceutical characterization of Nimesulide-LDH. Journal of Solid State Chemistry 2019, 272, 131 -137.
AMA StyleMarcella Bini, Francesco Monteforte, Irene Quinzeni, Valeria Friuli, Lauretta Maggi, Giovanna Bruni. Hybrid compounds for improving drugs solubility: Synthesis, physico-chemical and pharmaceutical characterization of Nimesulide-LDH. Journal of Solid State Chemistry. 2019; 272 ():131-137.
Chicago/Turabian StyleMarcella Bini; Francesco Monteforte; Irene Quinzeni; Valeria Friuli; Lauretta Maggi; Giovanna Bruni. 2019. "Hybrid compounds for improving drugs solubility: Synthesis, physico-chemical and pharmaceutical characterization of Nimesulide-LDH." Journal of Solid State Chemistry 272, no. : 131-137.
An intriguing and promising anode material for Li ion batteries, FeNb11O29, is emerging in the last few years. Its main strength lies into the possibility to exchange up to 23 electrons per formula unit, thanks to the redox reactions involving Fe3+ and Nb5+ ions, reaching a theoretical capacity value of 400 mAh/g. In this paper, a systematic study to determine the effect of carbon type and polymorph (monoclinic or orthorhombic) used to prepare the anode ink on the electrochemical performances was carried out. The best high rate capacity values (250 mAh/g at 10C after 100 cycles) and structural cycling stability (about 96.4%) were obtained for the orthorhombic polymorph mixed with Super C65 carbon. For the intercalation/deintercalation process, a prevailing of pseudocapacitive behavior with respect to the diffusive one was evidenced, especially at higher C rate, that is related to the peculiar structural aspects of FeNb11O29 shear structure.
Daniele Spada; Irene Quinzeni; Marcella Bini. Orthorhombic and monoclinic modifications of FeNb11O29, as promising anode materials for lithium batteries: Relationships between pseudocapacitive behaviour and structure. Electrochimica Acta 2018, 296, 938 -944.
AMA StyleDaniele Spada, Irene Quinzeni, Marcella Bini. Orthorhombic and monoclinic modifications of FeNb11O29, as promising anode materials for lithium batteries: Relationships between pseudocapacitive behaviour and structure. Electrochimica Acta. 2018; 296 ():938-944.
Chicago/Turabian StyleDaniele Spada; Irene Quinzeni; Marcella Bini. 2018. "Orthorhombic and monoclinic modifications of FeNb11O29, as promising anode materials for lithium batteries: Relationships between pseudocapacitive behaviour and structure." Electrochimica Acta 296, no. : 938-944.
FeNb11O29, an intriguing and promising material is emerging in the last few years due to its peculiar structural features.
Daniele Spada; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Irene Quinzeni; Doretta Capsoni; Marcella Bini. Deepening the shear structure FeNb11O29: influence of polymorphism and doping on structural, spectroscopic and magnetic properties. Dalton Transactions 2018, 47, 15816 -15826.
AMA StyleDaniele Spada, Maria Cristina Mozzati, Benedetta Albini, Pietro Galinetto, Irene Quinzeni, Doretta Capsoni, Marcella Bini. Deepening the shear structure FeNb11O29: influence of polymorphism and doping on structural, spectroscopic and magnetic properties. Dalton Transactions. 2018; 47 (44):15816-15826.
Chicago/Turabian StyleDaniele Spada; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto; Irene Quinzeni; Doretta Capsoni; Marcella Bini. 2018. "Deepening the shear structure FeNb11O29: influence of polymorphism and doping on structural, spectroscopic and magnetic properties." Dalton Transactions 47, no. 44: 15816-15826.
A detailed characterization of the polymorphs constituting cathode materials, both before and after cell cycling, is mandatory to develop more stable and powerful lithium batteries. In many cases, e.g. for transition metal lithium silicates, standard diffraction techniques cannot give a clear-cut response. Here we show that broadband adiabatic fast MAS NMR can give unique information in the case of model Li2(Mn,Fe)SiO4 high-capacity cathode materials. By coupling 7Li and 29Si 1D and 2D spectra, we are able to address polymorphs speciation also in the mixed Mn/Fe compositions, which is a nearly impossible task for X-rays and neutrons diffraction. We finally discuss the conditions under which this approach is useful when applied to rare nuclei such as 29Si.
Chiara Ferrara; Stefania Ferrari; Marcella Bini; Doretta Capsoni; Guido Pintacuda; Piercarlo Mustarelli. To Which Extent Is Paramagnetic Solid-State NMR Able To Address Polymorphism in Complex Transition-Metal Oxides? The Journal of Physical Chemistry Letters 2018, 9, 6072 -6076.
AMA StyleChiara Ferrara, Stefania Ferrari, Marcella Bini, Doretta Capsoni, Guido Pintacuda, Piercarlo Mustarelli. To Which Extent Is Paramagnetic Solid-State NMR Able To Address Polymorphism in Complex Transition-Metal Oxides? The Journal of Physical Chemistry Letters. 2018; 9 (20):6072-6076.
Chicago/Turabian StyleChiara Ferrara; Stefania Ferrari; Marcella Bini; Doretta Capsoni; Guido Pintacuda; Piercarlo Mustarelli. 2018. "To Which Extent Is Paramagnetic Solid-State NMR Able To Address Polymorphism in Complex Transition-Metal Oxides?" The Journal of Physical Chemistry Letters 9, no. 20: 6072-6076.
Pietro Galinetto; Benedetta Albini; Marcella Bini; Maria Cristina Mozzati. Raman spectroscopy in Zinc Ferrites Nanoparticles. Raman Spectroscopy 2018, 1 .
AMA StylePietro Galinetto, Benedetta Albini, Marcella Bini, Maria Cristina Mozzati. Raman spectroscopy in Zinc Ferrites Nanoparticles. Raman Spectroscopy. 2018; ():1.
Chicago/Turabian StylePietro Galinetto; Benedetta Albini; Marcella Bini; Maria Cristina Mozzati. 2018. "Raman spectroscopy in Zinc Ferrites Nanoparticles." Raman Spectroscopy , no. : 1.
Marcella Bini; Francesco Monteforte. Layered Double Hydroxides (LDHs): Versatile and Powerful Hosts for Different Applications. Journal of Analytical & Pharmaceutical Research 2018, 7, 1 -3.
AMA StyleMarcella Bini, Francesco Monteforte. Layered Double Hydroxides (LDHs): Versatile and Powerful Hosts for Different Applications. Journal of Analytical & Pharmaceutical Research. 2018; 7 (1):1-3.
Chicago/Turabian StyleMarcella Bini; Francesco Monteforte. 2018. "Layered Double Hydroxides (LDHs): Versatile and Powerful Hosts for Different Applications." Journal of Analytical & Pharmaceutical Research 7, no. 1: 1-3.
Spinel ferrites are an amazing class of materials that can find application in different fields, from sensors and lithium-ion batteries to the intriguing biomedical field. For the use as anode in lithium-ion batteries, ZnFe2O4 is rather competitive due to low price, abundance, environmental benignity, working voltage of ~1.5 V, and, most importantly, a high theoretical specific capacity (~1072 mA h g−1). For its practical application, however, some issues must be overcome, in particular its fast capacity fading and poor rate capability resulting from an inherent low electronic conductivity. Possible strategies are represented by ferrite carbon coating/embedding, peculiar synthesis routes, and doping. In this frame, we synthesized Ca- and Al-doped ZnFe2O4 nanoparticles by using microwave-assisted combustion synthesis, followed by a classical carbon coating (determined as about 5 wt% by thermogravimetry). A good solubility of Ca and Al up to 25 atom% on both Zn and Fe sites was obtained. Cyclic voltammetries evidenced redox reactions involving Zn and Fe ions, but also the Al intervention could be supposed. Galvanostatic charge–discharge cycles proved that particularly Al ions were useful to improve the anode structural stability at high C rate (up to 3C), thanks to the stronger Al–O bonds with respect to Fe–O ones. A further improvement of capacities comes from the use of sodium alginate as binder to substitute polyvinylidene fluoride in the anode preparation.
Irene Quinzeni; Vittorio Berbenni; Doretta Capsoni; Marcella Bini. Ca- and Al-doped ZnFe2O4 nanoparticles as possible anode materials. Journal of Solid State Electrochemistry 2018, 22, 2013 -2024.
AMA StyleIrene Quinzeni, Vittorio Berbenni, Doretta Capsoni, Marcella Bini. Ca- and Al-doped ZnFe2O4 nanoparticles as possible anode materials. Journal of Solid State Electrochemistry. 2018; 22 (7):2013-2024.
Chicago/Turabian StyleIrene Quinzeni; Vittorio Berbenni; Doretta Capsoni; Marcella Bini. 2018. "Ca- and Al-doped ZnFe2O4 nanoparticles as possible anode materials." Journal of Solid State Electrochemistry 22, no. 7: 2013-2024.
The development of efficient strategies for drug delivery is considerably desired. Indeed, often several issues such as the drug solubility, the control of the drug release rate, the targeted delivery of drugs, the drug bioavailability, and the minimization of secondary effects still present great obstacles. Different methodologies have been proposed, but the use of nano-hybrids compounds that combine organic and inorganic substances seems particularly promising. An interesting inorganic host is the layered double hydroxide (LDH) with a sheets structure and formula [M M (OH)](A) yHO (M = Zn, Mg; M = Al; A = nitrates, carbonates, chlorides). The possibility to exchange these counterions with drug molecules makes these systems ideal candidates for the drug delivery. In this article, we synthesize by co-precipitation method the hybrid compound Carprofen-ZnAl-LDH. Carprofen, a poorly soluble anti-inflammatory drug, could also benefit of the association with a natural antacid such as LDH, to reduce the gastric irritation after its administration. Through X-ray diffraction and Fourier-transformed infrared spectroscopy (FT-IR), we could verify the effective drug intercalation into LDH. The dissolution tests clearly demonstrate a significant improvement of the drug release rate when carprofen is in the form of hybrid compound.
Doretta Capsoni; Irene Quinzeni; Giovanna Bruni; Valeria Friuli; Lauretta Maggi; Marcella Bini. Improving the Carprofen Solubility: Synthesis of the Zn2Al-LDH Hybrid Compound. Journal of Pharmaceutical Sciences 2018, 107, 267 -272.
AMA StyleDoretta Capsoni, Irene Quinzeni, Giovanna Bruni, Valeria Friuli, Lauretta Maggi, Marcella Bini. Improving the Carprofen Solubility: Synthesis of the Zn2Al-LDH Hybrid Compound. Journal of Pharmaceutical Sciences. 2018; 107 (1):267-272.
Chicago/Turabian StyleDoretta Capsoni; Irene Quinzeni; Giovanna Bruni; Valeria Friuli; Lauretta Maggi; Marcella Bini. 2018. "Improving the Carprofen Solubility: Synthesis of the Zn2Al-LDH Hybrid Compound." Journal of Pharmaceutical Sciences 107, no. 1: 267-272.
Marcella Bini; Christian Tondo; Doretta Capsoni; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto. Superparamagnetic ZnFe2O4 nanoparticles: The effect of Ca and Gd doping. Materials Chemistry and Physics 2018, 204, 72 -82.
AMA StyleMarcella Bini, Christian Tondo, Doretta Capsoni, Maria Cristina Mozzati, Benedetta Albini, Pietro Galinetto. Superparamagnetic ZnFe2O4 nanoparticles: The effect of Ca and Gd doping. Materials Chemistry and Physics. 2018; 204 ():72-82.
Chicago/Turabian StyleMarcella Bini; Christian Tondo; Doretta Capsoni; Maria Cristina Mozzati; Benedetta Albini; Pietro Galinetto. 2018. "Superparamagnetic ZnFe2O4 nanoparticles: The effect of Ca and Gd doping." Materials Chemistry and Physics 204, no. : 72-82.