DU Yinghe, LI Wentao, LI Jiake, LIU Xin, JIANG Hedong, GUO Pingchun, ZHU Hua, WANG Yanxiang
(School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China)
Abstract: Graphene oxide (GO) was prepared by using the modified Hummers method, with which rGO/BiVO4 composite photocatalyst was then synthesized by using hydrothermal method, together with bismuth nitrate and ammonium metavanadate as the main raw materials. Phase composition, microstructure, element distribution, light absorption properties and specific surface area of the samples were studied by using XRD, SEM, EDS, UV-VIS and BET techniques. Photodegradation performance of the samples was studied by using methylene blue solution (10 mg·L−1) as a simulated pollutant. Due to the incorporation of rGO, light absorption of rGO/BiVO4 was increased and its band gap was adjusted, thus leading to improvement in photocatalytic ability. When the content of rGO is 1 wt.%, after hydrothermal reaction at 160 ℃ for 10 h, the synthesized rGO/BiVO4 exhibited optimal photocatalytic performance, with degradation rate of methylene blue solution reaching 91.1% under illumination for 240 min. Photocatalytic efficiency is increased by 26.7% as compared with that of the pure BiVO4.
Key words: rGO/BiVO4; phase composition; micromorphology; photocatalytic performance