Vanadium Pentoxide Xerogel
Mostrando 1-4 de 4 artigos, teses e dissertações.
-
1. Preparação e caracterização de pentóxido de vanádio mesoporoso e reações de intercalação / Synthesis and characterization of mesoporous vanadium pentoxide and intercalation reaction
Synthesis, characterization of vanadium pentoxide mesoporous and studies of properties of hybrids compound based on vanadium oxide xerogel and vanadium pentoxide mesoporous, intercalated with guest species have been the main of this thesis. The interest in those materials, that present a considerable structural and chemical modification, is due to the possib
Publicado em: 2007
-
2. Preparation, structural and electrochemical properties of V2O5-WO3 xerogel composite / Obtenção, caracterização e estudos das propriedades de compósitos formados por xerogéis de pentóxido de vanádio e óxido de tungstênio
Vanadium pentoxide xerogel has a bi-dimensional structure which is suitable for intercalation of a variety of ions, organic compounds, and even polymeric species. In addition, when associated with other metal oxides such as WO3 and MoO3, it presents an important role in catalysis, since the resulting oxides act as promoters in catalytic reduction of the NOx
Publicado em: 2007
-
3. Caracterização estrutural e eletrointercalação de íons lítio em compósitos V2O5/gelatina / Structural characterization and electrointercalation of lithium ions in V2O5/gelatin composites
In this work it was prepared and characterized structurally a new composite of vanadium pentoxide xerogel (XRG-V2O5) and gelatin in rate of 1 and 10% in weight (gelatin/V2O5). The xerogel obtained was submitted to drying (80, 200 or 300°C) under vacuum for 4 hours. The structural characterization consisted of X-ray diffraction (XRD), FTIR and Raman spectros
Publicado em: 2004
-
4. Development of electrochemical interfaces based on poly(pyrrole) and lamellar vanadium pentoxide xerogel nanocomposites. / "Desenvolvimento de interfaces eletroquímicas à base de nanocompósitos de poli(Pirrol) e xerogel lamelar de pentóxido de vanádio"
Esta tese apresenta um estudo detalhado das propriedades eletroquímicas dos nanocompósitos de V2O5.nH2O e poli(pirrol) sobre a superfície de eletrodos. Demonstramos aqui que pelo controle de parâmetros de síntese é possível alterar a composição das interfaces eletroquímicas dos eletrodos modificados, fazendo com que o poli(pirrol) esteja por cima,
Publicado em: 2001