title: Graphene-analogue BN-modified microspherical BiOI photocatalysts driven by visible light.
abstract: Novel hierarchical microspherical BiOI photocatalysts modified by graphene-analogue BN were prepared by a facile one-pot solvo-thermal method. Rhodamine B, methylene blue and 4-chlorophenol were used as target pollutants to evaluate the photocatalytic performance of the BN/BiOI composites under visible light irradiation. The experimental results indicated that the BN/BiOI composites exhibited a significantly enhanced photocatalytic activity compared with pure BiOI and P25 TiO2. The optimum photocatalytic activity was achieved when the BN content was 0.5 wt%. The improved photodegradation efficiency was mainly attributed to the extended light absorption range, larger specific surface area and increased separation rate of the photogenerated electron-hole pairs. The radical trapping experiments demonstrated that h(+) and ˙O2(-) radicals were the dominant active species, whereas the ˙OH radicals could be neglected. A possible photocatalytic mechanism is proposed. The strategy presented here provides an ideal platform for the design of other graphene-analogue BN-modified microspherical composite photocatalysts for broad applications in the field of photocatalysis.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, P.R. China. xiejm391@sohu.com czliud369@sina.com.
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Jiang
authors.forename: Chengzhang
authors.initials: C
authors.lastname: Zhu
authors.forename: Kun
authors.initials: K
authors.lastname: Qian
authors.forename: Ziyang
authors.initials: Z
authors.lastname: Wu
authors.forename: Jimin
authors.initials: J
authors.lastname: Xie
mesh_terms: D001729:Bismuth / Q000737:chemistry; D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D008027:Light; D008751:Methylene Blue / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010782:Photolysis / Q000528:radiation effects; D012235:Rhodamines / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002733:Chlorophenols; D012235:Rhodamines; C029107:4-chlorophenol; D006108:Graphite; C029773:rhodamine B; D008751:Methylene Blue; D001729:Bismuth