writer：YileWang； DanYu；Wei Wang；Pin Gao；LishanZhang；ShanZhong；Baojiang Liu
keywords：NanoparticlesCoO/BiVO4PhotocatalysisReactive Blue 19 (RB-19)
source：期刊
specific source：Colloids and Surfaces A: Physicochemical and Engineering Aspects
Issue time：2019年
Novel heterojunction CoO/BiVO4 composite catalysts with enhanced visible-light photocatalytic activities were successfully prepared with a simple one-step hydrothermal-calcination method. The CoO nanoparticles were deposited on the surface of the semiconductor BiVO4 nanocrystals to form heterostructure. The morphology and optical properties of the as-synth catalysts were characterized using both qualitative and quantitative methods. Compared with as-made samples under different pH values, the CoO/BiVO4 composite catalysts (pH?=?3) showed superior photocatalytic degradation activities. The degradation rate of RB-19 solution could be up to 100% in 30?min under visible light irradiation because of enhancing visible-light absorption and separation efficiency of electron-hole pairs. In addition, trapping experiment demonstrated O2? and h+ played crucial roles in the photocatalytic process of degrading C.I. Reactive Blue 19 (RB-19) under visible-light irradiation.