Abstract

In spite of the wide application of nanodisperse tungsten oxide (from photo- and electrochromic devices to biomedical materials), its physicochemical properties were studied insufficiently. In this work, we have performed a comparative analysis of photochromic and photocatalytic properties of polyvinylpyrrolidone-stabilized tungsten oxide nanoparticles prepared by ion exchange and precipitation from sodium tungstate solution. Reversible UV-induced reduction of Methylene Blue dye in the presence of photochromic tungsten oxide sol has been shown, the dependence of photochromic properties of tungsten oxide sols on sodium cation concentration in solution has been revealed.

中文翻译：

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在光致变色钨溶胶存在下紫外线诱导的亚甲基蓝染料的光催化还原

摘要

尽管纳米分散氧化钨得到了广泛的应用（从光致变色和电致变色器件到生物医学材料），但对其理化性质的研究还不够充分。在这项工作中，我们进行了比较分析，该研究通过离子交换和从钨酸钠溶液中沉淀制备的聚乙烯吡咯烷酮稳定的氧化钨纳米颗粒的光致变色和光催化性能。已经显示了在光致变色氧化钨溶胶存在下可逆的紫外线诱导的亚甲基蓝染料还原，已经揭示了氧化钨溶胶的光致变色特性对溶液中钠阳离子浓度的依赖性。