摘要
以钛酸丁酯为原料,采用溶胶—凝胶法成功制备了一系列La3+-TiO2光催化剂。通过XRD对催化剂进行了表征,XRD光谱结果表明所制得的TiO2光催化剂晶型结构为锐钛矿型。考察了pH值对甲基橙在纯TiO2光催化剂表面的吸附以及掺杂量对吸附的影响,通过紫外-可见光吸收光谱分析得出碱性或中性条件下的吸附较好。镧(La3+)掺杂量的TiO2对甲基橙的吸附实验表明,La3+的掺杂显著提高了甲基橙在TiO2催化剂表面的吸附能力,随着La3+掺杂量的增加,吸附能力逐渐增强。
In this paper, a series of La^3＋ -TiO2 photocatalysts were prepared by sol - gel method using Ti（OC4H9）4 as precusor. The catalysts were characterized by XRD, the XRD spectrum results show that the crystal structure of the TiO2 photocatalyst is anatase. The adsorption experiment of methyl orange on the surface of pure TiO2 shows that adsorptive capacity is better under the alkalinity and the neutral condition than that under the acidic condition by UV- visible light absorption spectrum. The different quantity of lanthanum（ La^3＋） doping TiO2 carrying on the adsorption experiment to the methyl orange shows that La^3＋- doping significantly increases the adsorption capacity of the methyl orange on the surface of the TiO2 catalyst. Adsorption capacity strengthens gradually along with the quantity of La^3＋ - doping increasing.
出处
《环境保护科学》
CAS
2009年第4期57-59,共3页
Environmental Protection Science
基金
湖南省科技厅资助项目(2008FJ4064)
怀化学院优秀青年项目
关键词
二氧化钛
镧离子
掺杂
吸附
基橙
Titanium Dioxide Lanthanum Ions Doping Adsorption Methyl Orange
