掺杂铜和钒的纳米二氧化钛的光催化性能

来源期刊：中南大学学报(自然科学版)2006年第4期

论文作者：关鲁雄 李家元 王婷 李娟 钟文毅

文章页码：731 - 736

关键词：溶胶凝胶法;水热法;掺杂;纳米二氧化钛;光催化

Key words：sol-gel method; hydrothermal treatment; doping; nano-crystallite TiO₂; photocatalysi

摘    要：采用溶胶凝胶水热后处理法制备掺杂铜和钒的纳米二氧化钛,并对所得的纳米二氧化钛光催化剂的成分、结构与光催化性能的关系进行研究。用X射线衍射、荧光光谱、紫外可见漫反射光谱对其进行分析。研究结果表明:其晶粒直径约为6 nm;电子空穴分离效率提高;对可见光响应显著增强。通过光催化降解模拟实验,发现该二氧化钛粉末对甲基橙有机废水的降解率达到97.9%,所得到的掺杂纳米二氧化钛光催化剂扩大了对可见光响应范围,提高了光催化降解效率。

Abstract: Nanometer TiO₂doped with Cu²⁺ and V⁵⁺ was prepared by sol-gel method and hydrothermal treatment. Relationship between the ingredient and structure of photocatalyst of nanometer TiO₂ and photocatalysis was investigated. The structure and photocatalysis of nano-meter TiO₂ obtained were studied by X-ray diffraction, fluorescence spectrum and ultraviolet visible diffuse reflection spectrum. The results show that the nanometer-sized TiO₂ has a crystal-line diameter of 6 nm. The efficiency of electron-cavity separated is increased. The scope of visible light absorbed is increased. Through the photocatalysis decomposed simulation experiment,the degradation rate of TiO₂ for organic waste water containing methyl orange reaches 97.9%.The doped nanometer TiO₂ increases the scope in which the visible light is absorbed, and the efficiency is improved.