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Double Br sources fabrication and photocatalytic property of p‐n junction BiOBr/ZnO composites for phenol removal
Author(s) -
Duo Fangfang,
Wang Yawen,
Mao Xiaoming,
Fan Caimei,
Zhang Hui
Publication year - 2014
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201400076
Subject(s) - photocatalysis , x ray photoelectron spectroscopy , phenol , materials science , high resolution transmission electron microscopy , fabrication , composite material , degradation (telecommunications) , irradiation , chemical engineering , catalysis , nanotechnology , transmission electron microscopy , chemistry , organic chemistry , alternative medicine , physics , pathology , computer science , nuclear physics , engineering , medicine , telecommunications
P‐n junction BiOBr/ZnO composites were prepared by a facile solvothermal process with double Br sources of CTAB and KBr. The samples were characterized by XRD, XPS, SEM, TEM, HRTEM, DRS, BET and PL. The BiOBr/ZnO composites exhibited much higher photocatalytic activity than single BiOBr and ZnO for the degradation of phenol under simulated sunlight irradiation. The enhanced photocatalytic activity of BiOBr/ZnO composites could be mainly ascribed to the high‐efficiency separation of photogenerated electron‐hole pairs through BiOBr/ZnO p‐n junction. The reaction mechanism for the removal of phenol was also discussed. Hole and ·OH were the main reactive species. Moreover, the influence of disparate ratios of double Br sources to BiOBr/ZnO composites was also investigated. The results indicated that the BiOBr/ZnO composites prepared by double Br sources showed better photocatalytic activities than the sample prepared by single Br source.