An efficient photocatalyst for degradation of various organic dyes: Ag@Ag2MoO4-AgBr composite

作者：Bai, Yu-Yang; Lu, Yi; Liu, Jin-Ku^*

来源：Journal of Hazardous Materials, 2016, 307: 26-35.

DOI：10.1016/j.jhazmat.2015.12.052

• Environmental hazards
• organic pollutants
• Degradation
• Photocatalyst

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 O-2 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 7 min.

• 出版日期2016-4-15
• 单位华东理工大学