Silver halide/silver iodide@silver composite with excellent visible light photocatalytic activity for methyl orange degradation

Cuiyun Zeng; Baozhu Tian; Jinlong Zhang

doi:10.1016/j.jcis.2013.05.009

Silver halide/silver iodide@silver composite with excellent visible light photocatalytic activity for methyl orange degradation

J Colloid Interface Sci. 2013 Sep 1:405:17-21. doi: 10.1016/j.jcis.2013.05.009. Epub 2013 May 14.

Authors

Cuiyun Zeng¹, Baozhu Tian, Jinlong Zhang

Affiliation

¹ Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China.

PMID: 23768630
DOI: 10.1016/j.jcis.2013.05.009

Abstract

AgBr/AgI@Ag composite photocatalyst was prepared by a handy multistep route, including controllable double-jet precipitation to synthesize cubic AgBr microcrystals, ion exchange to form AgI on AgBr surface, and visible light reduction to generate Ag nanoparticles. UV-Vis diffuse reflectance and electrochemical impedance spectra demonstrated that AgBr/AgI composite structure not only favors forming more silver nanoparticles to harvest visible light but also facilitates the transfer of charge carriers when compared with pure AgBr. Beneficial from the synergistic effect of highly effective visible light harvest and electron-hole separation, AgBr/AgI@Ag shows higher photocatalytic activity for the degradation of methyl orange (MO) than AgBr, AgBr@Ag, and AgBr/AgBr.