title: An efficient photocatalyst for degradation of various organic dyes: Ag@Ag2MoO4-AgBr composite.
abstract: The Ag2MoO4-AgBr composite was prepared by a facile in-situ anion-exchange method, then the Ag nanoparticles were coated on this composite through photodeposition route to form a novel Ag@Ag2MoO4-AgBr composite. The in-situ Br(-) replacement in a crystal lattice node position of Ag2MoO4 crystal allows for overcoming the resistance of electron transition effectively. Meanwhile silver nano-particles on the surface of Ag@Ag2MoO4-AgBr composite could act as electron traps to intensify the photogeneration electron-hole separation and the subsequent transfer of the trapped electron to the adsorbed O2 as an electron acceptor. As an efficient visible light catalyst, the Ag@Ag2MoO4-AgBr composite exhibited superior photocatalytic activity for the degradation of various organic dyes. The experimental results demonstrated superior photocatalytic rate of Ag@Ag2MoO4-AgBr composite compared to pure AgBr and Ag2MoO4 crystals (37.6% and 348.4% enhancement respectively). The Ag@Ag2MoO4-AgBr composite cloud degraded Rhodamin B, bromophenol blue, and amino black 10b completed in 7min.
authors.affiliation: Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, PR China.
authors.forename: Yu-Yang
authors.initials: YY
authors.lastname: Bai
authors.affiliation: Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, PR China. Electronic address: jkliu@ecust.edu.cn.
authors.forename: Jin-Ku
authors.initials: JK
authors.lastname: Liu
keywords: Degradation; Environmental hazards; Organic pollutants; Photocatalyst