Buscar
Mostrando ítems 21-30 de 43
Investigação do mecanismo de formação de filmes porosos de TiO2 obtidos por anodização galvanostática
(Universidade Federal de São Carlos, 2011-10-20)
In this work the experimental and theoretical aspects of the growth of titanium dioxide obtained by galvanostatic anodization were studied. The _lms were prepared by galvanostatic anodization of titanium, where the curve ...
Estudo das propriedades eletroquímicas e magnéticas do polipirrol
(Universidade Federal de São Carlos, 2010-11-22)
In this work the electrochemical degradation of polypyrrole films was studied by means of an applied overpotential and the magnetic properties of polypyrrole pellets, when these were modified by the incorporation of metallic ...
Novas rotas para a síntese hidrotérmica de nanoestruturas de óxidos de titânio
(Universidade Federal de São Carlos, 2012-02-28)
The development of new materials has been a major focus of modern science. In order to obtain materials with desired features, studies about synthesis are necessary for a better understanding of their synthetic processes. ...
Estudo da corrosão de aço AISI 1020 em meio de petróleo
(Universidade Federal de São Carlos, 2011-08-11)
The chemical attack on crude oil, which contains corrosive compounds such as H2S, CO2, naphthenic acids and salts dissolved in the aqueous phase, combined with effects of varying pH, temperature, flow and pressure, has ...
Propriedades fotoluminescentes do CuMoO4
(Universidade Federal de São Carlos, 2011-12-19)
In this study, CuMoO4 were synthesized, characterized and crystallized into powders in two structures: monoclinic and triclinic. CuMoO4 powder were synthesized by precipitation, and the reaction s pH were controlled due ...
Estudo das propriedades ópticas e estruturais de nanocristais de ZnS, obtidos pelo método solvotérmico aquecido por microondas
(Universidade Federal de São Carlos, 2013-04-26)
This work deals with the synthesis, characterization and study of nanostructures of zinc sulfide (ZnS) synthesized by microwave heated solvothermal method The synthesis method employed was extremely efficient leading to ...
Desenvolvimento de compósitos poliméricos baseados em matriz biodegradável e nanozeólitas
(Universidade Federal de São Carlos, 2010-09-27)
The current market demands make with what Brazilian agribusiness search improvements in processes and new materials to reduce waste, pollution and biological contamination. Mainly materials that more are easily degraded ...
Avaliação da atividade catalítica de óxidos cerâmicos na conversão de óleos vegetais
(Universidade Federal de São Carlos, 2011-02-04)
Organic pollutants are one of the major problems related to water and environmental pollution. Nowadays, vegetable oils represent a considerable source for water contamination. The search for new strategies to provide an ...
Método solvotérmico assistido por micro-ondas aplicado à obtenção de nanocristais de ITO : deposição e caracterização de filmes de ITO
(Universidade Federal de São Carlos, 2012-02-17)
The formation of In1-xSnxO2 (ITO) nanocrystals through the conversion of radiant energy into heat has been studied by using an adapted domestic microwave oven. The formation of powder was obtained by heating the oven to ...
Uso da modelagem molecular na solução de problemas em química
(Universidade Federal de São Carlos, 2014-08-29)
The studies presented herein show the use of molecular modelling coupled to spectroscopic data to tackle four different problems in organic chemistry. In the first study, the sulfonylation of the primary hydroxyl group of ...