La<sup>3+</sup>掺杂TiO<sub>2</sub>的制备及光催化性能研究

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La³⁺掺杂TiO₂的制备及光催化性能研究

基金项目:

绿色催化四川省高校重点实验室资助项目(No.LYJ03、No LYJ1203)；四川理工学院学科建设项目

1. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China;
2. College of Materials and Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China

摘要: 采用溶胶-凝胶法制备了La³⁺掺杂的TiO₂光催化剂(La/Ti原子比分别为1/100,2/100,3/100,4/100和5/100)。用比表面(BET)、X射线粉末衍射(XRD)、紫外可见漫反射光谱(DRS)和表面光电压谱(SPS)对所制备的光催化剂进行了表征。结果表明,La³⁺掺杂量为4%(La/Ti原子比)时所制备的TiO₂具有最高电子-空穴分离效应。以甲基橙为模拟偶氮染料对所制备光催化剂的脱色性能进行考察,光催化脱色结果显示La³⁺掺杂量为4%时所制备的TiO₂具有最高的光催化活性。
- TiO₂ /
- 光催化 /
- 掺杂 /
- La³⁺
Abstract: La³⁺-doped TiO₂ with different molar ratios of La/Ti(1/100,2/100,3/100,4/100 and 5/100) were prepared by a facile Sol-Gel method.The photocatalysts prepared were characterized by Brunauer-Emmet-Teller(BET) method,X-ray diffraction(XRD),UV-Vis diffuse reflectance spectra and surface photovoltage spectra(SPS).The results showed that TiO₂ doped with 4%(the molar ratio of La/Ti) of La³⁺ had the highest photoinduced charge separation rate.The decolorizing performances of TiO₂ and La³⁺-doped TiO₂ was evaluated respectively by using aqueous methyl orange solution as simulative azo dye,and it could be concluded that the TiO₂ doped with 4% of La³⁺ has the best photocatalytic performance.
- TiO₂ /
- photocatalysis /
- doping /
- La³⁺