Poly(vinyl alcohol) as a structuring agent for peroxotungstic acid
作者： Diego Soares de Moura , Julia Cristina Oliveira Pazinato , Marcelo Barbalho Pereira , Omar Mertins , Emerson Rodrigo Silva
DOI: 10.1016/J.MOLLIQ.2018.08.015
关键词:
摘要: Abstract Poly(vinyl alcohol) (PVAL) is an interesting architecture-directing material and useful for synthesizing transition metal oxides through the sol-gel method. In this work, interaction between PVAL peroxotungstic acid (PTA) in aqueous media was investigated by conductivity, zeta potential, small-angle X-ray scattering , isothermal titration calorimetry fluorescence measurements. The strong exothermic effect change organization media, from extended chains to compact forming fractal structures, confirm PTA PVAL. Powders were obtained these systems removal of water subsequent calcination. An increase crystal size changes morphology observed with increasing concentration. band gap values, diffuse reflectance spectroscopy, 2.50 2.60 eV showed that are able absorb light visible part electromagnetic spectra.
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