3DOM BiVO4 supported silver bromide and noble metals: High-performance photocatalysts for the visible-light-driven degradation of 4-chlorophenol

• Published in: Applied catalysis. B, Environmental Vol. 168-169; pp. 274 - 282
• Main Authors: Ji, Kemeng, Dai, Hongxing, Deng, Jiguang, Zang, Hongjun, Arandiyan, Hamidreza, Xie, Shaohua, Yang, Huanggen
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2015
• Subjects: 4-Chlorophenol degradation; BiVO4 supported AgBr; Photocatalyst; Supported noble metals; Three-dimensionally ordered macropore; Supported noble metals; 4-Chlorophenol degradation; Three-dimensionally ordered macropore; BiVO4 supported AgBr; Photocatalyst
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2014.12.045

[Display omitted] •3DOM BiVO4 (3D-BiV) is fabricated via the polymethyl methacrylate-templating route.•AgBr/3D-BiV is fabricated using the low-temperature deposition method.•M/AgBr/3D-BiV (MAu, Pt, Pd) are prepared via the PVA-protected reduction route.•M and AgBr are highly dispersed on the surface of 3D-BiV.•Pd/AgBr/3D-BiV performs the best for visible-light-driven degradation of 4-chlorophenol. Three-dimensionally ordered macroporous (3DOM) photocatalysts BiVO4 (denoted as 3D-BiV), AgBr/3D-BiV, and 0.17wt% M/AgBr/3D-BiV (MAu, Pt, and Pd) were prepared using the polymethyl methacrylate-templating, low-temperature deposition, and polyvinyl alcohol-protected reduction methods, respectively. The as-prepared BiVO4 possessed a good-quality 3DOM structure and a high surface area. It is found that the AgBr and noble metals were uniformly distributed on the surface of 3D-BiV. Among the M/AgBr/3D-BiV samples, the 0.17wt% Pd/AgBr/3D-BiV sample showed the highest photocatalytic activity for the degradation of 4-chlorophenol (4-CP) under visible light illumination (i.e., complete 4-CP degradation could be achieved within 150min), which was associated with its good 3DOM structure, high surface oxygen adspecies concentration, easy transfer and separation of photogenerated carriers, and synergistic effect between AgBr or Pd nanoclusters and BiVO4.