A5058320747- Multiferroics and related materials
- Dielectric properties of ceramics
- Advanced Condensed Matter Physics
- Ferroelectric and Piezoelectric Materials
- Copper-based nanomaterials and applications
- Crystal Structures and Properties
- Magnetic and transport properties of perovskites and related materials
- Glass properties and applications
- X-ray Diffraction in Crystallography
- Catalysis for Biomass Conversion
- Chalcogenide Semiconductor Thin Films
- Polyoxometalates: Synthesis and Applications
- Pigment Synthesis and Properties
- Catalytic Processes in Materials Science
- Clay minerals and soil interactions
- Metallic Glasses and Amorphous Alloys
- Catalysis and Hydrodesulfurization Studies
- Electrocatalysts for Energy Conversion
- Luminescence Properties of Advanced Materials
- Mineralogy and Gemology Studies
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Chemical Synthesis and Characterization
- Radioactive element chemistry and processing
- Thermal Expansion and Ionic Conductivity
Universidade Estadual de Campinas (UNICAMP)
2025
Universidade Federal de Sergipe
2022-2024
Universidade Estadual do Ceará
2021-2023
Mesoporous Cu(Fe)/SBA-15 catalysts were prepared with distinct metal loadings of ca. 2–10 wt.%. A detailed set characterizations using X-ray diffraction (XRD), electron paramagnetic resonance (EPR), transmission microscopy (TEM), scanning coupled to energy dispersive spectroscopy (SEM-EDS), Mössbauer spectroscopy, photoelectron (XPS) and Raman was performed correlate the relationship among structure, electronic properties catalytic performances. All solids evaluated in selective reduction...
A La 2 MnFeO 6 double-perovskite with a defective structure was used as an efficient catalyst for the esterification of glycerol acetic acid to produce esters comparable metal-doped niobates.
Nanosized Fe-based solids exhibited favorable features for catalytic application in the solvent-free acetalization of glycerol with aldehydes biofuel additives production. The physicochemical properties by SEM–EDS, TEM, EPR, XRD, Raman, Mössbauer, and FTIR measurements XPS analysis were correlated properties. Among different approaches utilized synthesis FeCo-based solids, copolymer-assisted coprecipitation method showed conversions superior to 20%, being stable materials rather than sol–gel...
We report on the magnetism of amorphous SiO2–Al2O3–CaO–MgO–Fe2O3–K2O–MnO:CA (CA—activated carbon) aluminosilicate glasses prepared by a fusion-quenching method. Fourier transform infrared and Raman spectroscopy show that Fe2+ lattice modifier in glass structures induces depolymerization, strongly influencing magnetic transitions. Room temperature magnetization measurements CA-glasses different behavior, such as speromagnetism, asperomagnetism, weak ferromagnetism. Mössbauer analyses at room...
Iron niobates, pure and substituted with copper (Fe1-xCuxNbO4 x = 0-0.15), were prepared by the solid-state method characterized X-ray diffraction, Raman spectroscopy, magnetic measurements. The results of structural characterizations revealed high solubility Cu ions in structure better stability compared to sample. analysis properties showed that antiferromagnetic-ferromagnetic transition was caused insertion Cu2+ into FeNbO4 structure. presented an antiferromagnetic ordering state, a Néel...