RGO/BiVO_4复合光催化剂的EDTA辅助水热合成及表征

EDTA-assisted Hydrothermal Synthesis and Photocatalytic Property of RGO/BiVO_4 Composites

以EDTA为络合剂,采用水热法制备了RGO/BiVO4复合光催化剂。利用X射线衍射(XRD)、Fourier变换红外光谱(FT-IR)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(DRS)对产物进行了表征;并以亚甲基蓝为目标降解物,分析了复合光催化剂在可见光下的光催化活性。结果表明,RGO的加入有效提高了BiVO4的可见光光催化性能。当RGO的质量分数为15%时,复合光催化剂的可见光催化活性最高,经100min的可见光照射,亚甲基蓝的降解率达到95%。

Reduced graphene oxide/BiVO4 （RGO/BiVO4） photocatalysts were prepared by a hydrothermal process using ethylene diamine tetraacetic acid （EDTA） as chelating agent. The as-prepared samples were characterized by X-ray diffraction, Fourier trans- form infrared spectroscopy, scanning electron microscopy and UV-Vis diffuse reflec- tance spectroscopy, respectively. The photocatalytic activity of RGO/BiVO4 photocata- lyst was investigated via degradation of methyl blue （MB） under visible-light irradia- tion. The results indicate that the visible-light photocatalytic activity of RGO/BiVO4 is enhanced in the presence of RGO. The RGO/BiVO4 with graphene oxide （GO） of 15% （in mass） exhibited a superior photocatalytic activity, which the degradation rate of MB reached 95% after visible light irradiation for 100 rain.