稀土元素掺杂TiO_2光催化性能的研究

Study on rare earth oxide doping on the phoyocatalytic activities of TiO_2

采用溶胶-凝胶法制备稀土元素(La3+、Ce3+)掺杂TiO2光催化剂,利用XRD、SEM、EDS、IR进行表征,并以亚甲基蓝为光降解反应对象,进行光催化降解实验,考察了掺杂稀土元素对TiO2光催化性能的影响。结果表明:La3+和Ce3+掺杂TiO2使得光催化剂的活性提高;煅烧温度为400℃时,掺杂La3+和Ce3+的TiO2光催化活性分别最佳,最佳掺杂量分别为1.0%和1.5%;0.5h光照后,二者降解率均达到90%以上。

Rare earth oxide （La3＋、Ce3＋） doping on the photocatalytic activities of TiO2 were compared by sol-gel method, and were characterized by XRD, SEM, EDS and IR. Photocatalytic degradation of methylene blue was studied by doping rare earth elements on the photocatalytic properties of TiO2. Result shows that photocatalytic activties of La3＋ and Ce3＋ - doping TiO2 is improved. Photocatalytic activties of La3＋ and Ce3＋-doping TiO2 are optimum at 400℃, and the best doped contents are 1.0% and 1.5%, respectively. After 0.5h light, both the degradation rate reached over 90%.