Crystallizing Vanadium Pentoxide Nanostructures in the Solid-State Using Modified Block Copolymer and Chitosan ComplexesReport as inadecuate




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A systematic study of the synthesis of V2O5 nanostructured materials using macromolecular PS-co-4-PVP center dotVCl3y and chitosan center dotVCl3y complexes is presented. It is demonstrated that various coordination degrees of the metal into the polymeric chain specifically influence the product formation after pyrolysis. PS-co-4-PVP center dotVCl3y and chitosan center dotVCl3y complexes were prepared by simple coordination reaction of VCl3 with the respective polymer inmolar ratios 1 : 1, 1 : 5, and 1 : 10 metal-polymer and characterized by elemental analysis, IR spectroscopy, and TGA-DSC analysis. Solid-state thermolysis of these precursors at several temperatures under air results in nanostructured V2O5 using all precursors. The size and shape of the nanostructured V2O5 depend on the nature of the polymer. For the chitosan center dotVCl3y precursors sub-10nm nanocrystals are formed. The calcination process, involved in the preparation method, produces V2O5 with photoluminescence in the visible light region, suggesting the possible application in oxygen sensing devices.Nota general

Artículo de publicación ISI



Author: Díaz, C.; - Barrera, G.; - Segovia, M.; - Valenzuela, M.; - Osiak, M.; - Dwyer, C.; -

Source: http://repositorio.uchile.cl/



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