锰掺杂二氧化钛的制备及其光催化性能研究.docVIP

锰掺杂二氧化钛的制备及其光催化性能研究 STUDY ON THE PREPATION AND PHOTO-CATALYTIC CAPABILITY OF MANGANESE DOPED TITANIUM DEOXIDE 专 业： 姓 名： 指导教师姓名： 申请学位级别： 论文提交日期： 学位授予单位： 摘(TiO2)是一种能带间隙较宽的新型半导体((n型)材料，其化学性能稳定，耐热、耐光、白度好、折射率高、着色力强、遮盖率大、无毒无害，并能散射及吸收紫外线，是一种比较理想的光催化剂。但是较宽的禁带使它的应用受到一定程度的限制，通过掺杂一些其他的物质可使TiO2的高Ti2的TiO2的TiO2对太阳光的利用率。金属掺杂可以减少光生电子-空穴对的复合，提高TiO2的紫外可见光谱关键词ABSTRACT Semiconductor photocatalytic technology has significant effect on degradation of organic matter, and has broad application prospects. In recent years, semiconductor photocatalysis has become one of the research hotspots of photochemistry and environmental protection in the field of. Titanium dioxide (TiO2) is a new type of semiconductor energy band gap wide (n) material, its chemical stability, heat resistance, light resistance, good whiteness, high refractive index, strong coloring, covering rate, non-toxic harmless, and scattering and absorption of ultraviolet light, is an ideal photocatalyst. But the wide band gap to the application subject to certain restrictions, by doping some other substances can change the band gap width increase the photocatalytic and photoelectric properties of TiO2. Doping generally includes the nonmetal doped and doped metal, nonmetal doping generally extends the range of absorption to light, improve the capability to visible light. Metal doped to composite inhibition of electron hole, improve the photocatalytic performance. This experiment adopts the sol-gel method to prepare TiO2, and on the basis of preparation of the doped TiO2 photocatalyst manganese sulfate monohydrate and four hydrated manganese chloride. The effects of catalyst performance factors of different dopants and the same substance in different concentration and different calcination temperature on catalyst. By using UV-vis spectroscopy, scanning electron microscope test method to characterize the different preparation conditions of the p