title: Photocatalytic activity of novel AgBr/WO3 composite photocatalyst under visible light irradiation for methyl orange degradation.
abstract: A novel AgBr/WO(3) composite photocatalyst was synthesized by loading AgBr on WO(3) substrate via deposition-precipitation method and characterized by XRD, SEM and DRS. The as-prepared AgBr/WO(3) was composed of monoclinic WO(3) substrate and face-centered cubic AgBr nanoparticles with crystalline sizes less than 56.8 nm. AgBr/WO(3) had absorption edge at about 470 nm in the visible light region. The optical AgBr content in AgBr/WO(3) was 0.30:1 (Ag/W) at the corresponding apparent rate, k(app), of 0.0160 min(-1) for MO degradation. The highest k(app) was 0.0216 min(-1) for 4 g/L catalyst. The OH acted as active species. Addition of H(2)O(2) within 0.020 mmol/L can efficiently trap electrons to generate more OH and further improved photocatalytic activity of AgBr/WO(3).
authors.affiliation: School of Chemistry and Material Science, Huaibei Normal University, 100 Dongshan Road, Huaibei 235000, China. caojing@mail.ipc.ac.cn
authors.forename: Jing
authors.initials: J
authors.lastname: Cao
authors.forename: Bangde
authors.initials: B
authors.lastname: Luo
authors.forename: Haili
authors.initials: H
authors.lastname: Lin
authors.forename: Shifu
authors.initials: S
authors.lastname: Chen
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D001965:Bromides / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008027:Light; D010087:Oxides / Q000737:chemistry*; D010782:Photolysis / Q000187:drug effects / Q000528:radiation effects; D018030:Silver Compounds / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001965:Bromides; D004396:Coloring Agents; D010087:Oxides; D018030:Silver Compounds; C100258:methyl orange; C511604:tungsten oxide; C047751:silver bromide; D014414:Tungsten