Fe_2O_3/BiVO_4复合光催化剂的制备及光催化性能

Synthesis and Photocatalytic Performance of the Photocalyst Fe_2O_3/BiVO_4

采用水热法合成Bi VO4前驱体,并用原位水热沉积法将Fe2O3纳米颗粒沉积在Bi VO4表面上,对其进行修饰。同时,利用X射线光电子能谱、紫外-可见漫反射光谱对所制备的复合催化剂进行表征,并在500 W氙灯照射下对其进行亚甲基蓝降解测试。结果表明,Bi VO4经Fe2O3修饰后的光催化活性明显优于纯Bi VO4,对亚甲基蓝的光降解率较纯相Bi VO4提高了约76%。

A composite photocatalyst consisting of Fe2O3 deposited on Bi VO4 was prepared by a hydrothermal deposition method with Bi VO4 prepared via a hydrothermal method as the precursor. X-ray photoelectron spectra and UV-Vis diffuse reflectance spectroscopy was used to characterized the as-prepared photocatalyst. Then the photocatalytic activity test for its degradation on methylene blue was carried on under the irradiation of a 500 W Xenon lamp. The results showed that Fe2O3/Bi VO4 composite photocatalyst exhibited a higher photocatalytic performance than the pured Bi VO4. The degradation rate of the Fe2O3/Bi VO4 on methylene blue has increased by 76 % compared with pure Bi VO4.