二氧化钛系列光催化剂的拉曼光谱  

Raman Spectroscopy of Titanium Dioxide Photocatalyst

作　　者：王建强[1] 辛柏福[1] 于海涛[1] 谢玉涛[2] 赵冰[2] 付宏刚[1] 

机构地区：[1]黑龙江大学化学化工学院,哈尔滨150080 [2]吉林大学超分子结构与材料教育部重点实验室,长春130023

出　　处：《高等学校化学学报》2003年第7期1237-1240,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 1710 16 ;2 0 2 710 19);黑龙江省杰出青年科学基金 (2 0 0 2 );教育部科学技术研究重点项目(2 0 0 2 );黑龙江省普通高等学校骨干教师创新能力资助计划 (2 0 0 1);黑龙江省自然科学基金 (批准号 :B0 0 -0 6 )资助

摘　　要：采用溶胶 -凝胶法制备了 Ti O2 粉体和薄膜光催化剂 .使用 FT-Raman光谱和激光共聚焦拉曼光谱研究了粉体和薄膜的拉曼光谱 ,探讨了热处理条件、Fe3 +掺杂和以硅胶为载体的薄膜化所引起的 Ti O2 结构变化 .结果表明 ,Ti O2 在 35 0℃存在由无定形向锐钛矿相的转变 ,6 0 0℃下存在锐钛矿相向金红石相的转变 ,75 0℃下完全转变为金红石相 ;掺杂会引起 Ti O2 的晶格畸变 ,导致拉曼谱峰宽化 ;以硅胶为载体的 Ti O2 负载薄膜的部分拉曼谱峰与粉体相比 ,有一定的位移和宽化 .Nano-size TiO 2, Fe 3+-TiO 2, TiO 2/SiO 2, and Fe 3+-TiO 2/SiO 2 were prepared by sol-gel method. The structural change of TiO 2 caused by different calcining conditions, Fe 3+-doped contents, and formation of film on silica were studied by FT-Raman and confocal Raman technologies. The experimental results show that the different crystalline phases were observed at different calcinating temperatures. The titanium dioxide powder heated at 350-550 ℃ for two hours forms an anatase phase. The anatase phase materials transforms to rutile phase at 600 ℃ and transits completely to rutile phase calcining for two hours at 750 ℃. After doping Fe 3+, the FWHM at 144 cm -1 of Fe 3+-TiO 2 and Fe 3+-TiO 2/SiO 2 is broadened apparently compared with that of TiO 2 and TiO 2/SiO 2, respectively. Some peaks of TiO 2/SiO 2 coating film has some shift and broadening compared with those of TiO 2.

关 键 词：二氧化钛 光催化剂 拉曼光谱 溶胶-凝胶 制备 TIO2 掺杂 负载薄膜 

分 类 号：O614.411[理学—无机化学] O643.36[理学—化学]