紫外光辐射对TiO_2溶胶的影响研究  

A Study of Influence on TiO_2 Sol with UV Irradiation

作　　者：管自生[1] 姚建年[1] 马颖[1] 宋延林[1] 江雷[1] 

机构地区：[1]中国科学院化学研究所分子科学中心,北京100080

出　　处：《高等学校化学学报》2002年第10期1956-1959,共4页Chemical Journal of Chinese Universities

基　　金：中国科学院资助 (批准号 :KJ95 2 J15 2 2 );973项目(批准号:G19990 64 5 0 4)资助

摘　　要：用紫外 -可见吸收光谱、动态光散射与透射电镜研究紫外光辐射对 Ti O2 溶胶的影响 ,结果表明 ,光辐射使 Ti O2 溶胶在可见光区的吸收减少 ,紫外区吸收增加 ,吸收带隙增大 .与非光辐射的 Ti O2 溶胶粒子相比 ,光辐射使 Ti O2 溶胶粒子分布均匀且平均粒径减小 ,提高了 Ti O2Influence on TiO 2 sol irradiated with UV was studied by UV-Vis absorption spectra, dynamic laser light scattering(DLS) and TEM. The results show that absorbance of TiO 2 sol decreased in the visible region and increased in the near ultraviolet region, and the bandgap of TiO 2 sol increased during the process of UV irradiation. Comparison of TiO 2 sol without UV irradiation, average size of TiO 2 sol particles irradiated with UV decreased and its size distribution was more homogenous, and its crystallite was improved and anatase TiO 2 was formed at room temperature.

关 键 词：紫外光辐射 TIO2溶胶 紫外-可见吸收光谱 动态光散射 透射电镜 二氧化钛 纳米粒子 

分 类 号：O614.411[理学—无机化学] O648.17[理学—化学]