A5081337608- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Corrosion Behavior and Inhibition
- Layered Double Hydroxides Synthesis and Applications
- Silicone and Siloxane Chemistry
- Luminescence Properties of Advanced Materials
- Aerogels and thermal insulation
- Polymer Nanocomposites and Properties
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Catalysis and Hydrodesulfurization Studies
- Transition Metal Oxide Nanomaterials
- biodegradable polymer synthesis and properties
- Concrete Corrosion and Durability
- Lanthanide and Transition Metal Complexes
- Catalysis and Oxidation Reactions
- Iron oxide chemistry and applications
- Advanced Photocatalysis Techniques
- Polymer composites and self-healing
- Surfactants and Colloidal Systems
- Copper-based nanomaterials and applications
- Glass properties and applications
- Quantum Dots Synthesis And Properties
Centro Universitário de Araraquara
2014-2024
Universidade Estadual Paulista (Unesp)
2015-2024
Universidade de São Paulo
2002-2019
Instituto de Botânica
1998-2018
Instituto de Tecnología Química
2012
Synchrotron soleil
2009-2010
University of Wuppertal
2010
Universidade Federal de Minas Gerais
2010
Centre National de la Recherche Scientifique
1989-2009
Université Paris-Sud
2004-2009
In this work, a set of experimental electrophoretic mobility (μe) data was used to show how inappropriate selection the electrokinetic model calculate zeta potential (ζ-potential) can compromise interpretation results for nanoparticles (NPs). The main consequences using ζ-potential values as criteria indicate colloidal stability NP dispersions are discussed based on DLVO interaction energy predictions. For this, magnetite (Fe3O4) NPs were synthesized and characterized system performing...
The chemical and structural nature of powders prepared from the zinc acetate-derived precursor using sol−gel route is discussed. influence synthesis temperature hydrolytic catalyst on features powder focused basis X-ray diffraction (XRPD) extended absorption fine structure (EXAFS) measurements complemented with density thermoanalysis (TG-DTA) results. EXAFS XRPD results show that no-washed nanoparticulate are composed a mixture ZnO (wurtzite), acetate, hydroxyacetate. latter has layered...
Polysiloxane hybrid films were deposited on 316 L stainless steel substrates by dip-coating in a sol prepared acid-catalyzed hydrolytic co-polycondensation of tetraethoxysilane (TEOS) and 3-methacryloxy propyltrimethoxysilane (MPTS), followed radical polymerization methacrylic moieties. Structural features the polysiloxane hybrids studied using 13C 29Si nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS) thermogravimetric analysis (TGA), as function TEOS/MPTS ratio,...
The LDH memory effect is driven by an aggregative nucleation and growth mechanism limited the adsorption of anionic dye in on external surface.
The processes of formation, aggregation, and growth ZnO quantum dots (Qdot) induced by the addition KOH solution ([OH]/[Zn] = 0.5) to zinc oxy-acetate ethanolic at 40 °C were examined in depth situ simultaneous time-resolved monitoring UV−vis absorption spectra combined with small-angle X-ray scattering (SAXS) fine structure (XAFS) measurements. XAFS results recorded Zn K-edge evidence presence both precursor nanocrystals. Each spectrum could be described a linear combination each reference...
Environmentally compliant organic–inorganic hybrid coatings for efficient corrosion protection of metallic surfaces are potential alternatives to the current method based on chromate passivation.
Carbon nanotubes (CNTs) and graphene oxide (GO) have been used to reinforce PMMA-siloxane-silica nanocomposites considered be promising candidates for environmentally compliant anticorrosive coatings. The organic-inorganic hybrids were prepared by benzoyl peroxide (BPO)-induced polymerization of methyl methacrylate (MMA) covalently bonded through 3-(trimethoxysilyl)propyl (MPTS) silica domains formed hydrolytic condensation tetraethoxysilane (TEOS). Single-walled carbon nanosheets dispersed...
Hybrid organic−inorganic two-phase nanocomposites of siloxane−poly(ethylene glycol) (SiO3/2−PEG) and siloxane−poly(propylene (SiO3/2−PPG) have been obtained by the sol−gel process. In these composites, nanometric siloxane heterogeneities are embedded in a polymeric matrix with covalent bonds interfaces. The structure materials was investigated samples different molecular weights polymer using small-angle X-ray scattering (SAXS) technique. SAXS spectra exhibit well-defined peak that...
Abstract Structural and surface features of highly dispersed copper catalysts supported on hierarchical porous alumina were evaluated for the ethanol dehydrogenation reaction. The prepared by incipient wetness impregnation obtained a dual template sol–gel procedure. characterizations provided evidence that was in form monomeric octahedral Cu 2+ species adsorbed into an incomplete layer. A two‐step reduction observed temperature range 50–250 °C under H 2 /He flow. onset percentage + formed...