title: Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A.
abstract: Novel Bi4O5Br2 photocatalysts were synthesized by a one-pot solvothermal method in the presence of reactable ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([C16mim]Br). X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS) and other characterizations were applied to investigate their structures, morphologies, optical and electronic properties. Bisphenol-A (BPA) was chosen to evaluate the photocatalytic activity of Bi4O5Br2 nanosheets. After the visible light irradiation, about 91.2% of BPA were removed by Bi4O5Br2 after 3.5h with the reaction rate constant of 0.01086, which is much higher than that of the pure BiOBr (24.4%). Liquid chromatography combined with mass spectrometry (LC-MS) technique was used to track the intermediates species, showing the photocatalytic mechanism is related to photogenerated holes instead of hydroxyl radicals. The as-prepared Bi4O5Br2 also exhibited excellent stability as well as reusability, implying a great promising practical application for the photodegradation of organic pollutants.
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China. Electronic address: xjx@ujs.edu.cn.
authors.forename: Jiexiang
authors.initials: J
authors.lastname: Xia
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Ge
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Di
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Yin
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Hainan Institute of Science and Technology, Hainan, Haikou 571126, PR China.
authors.forename: Pengjun
authors.initials: P
authors.lastname: Liu
authors.affiliation: School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China. Electronic address: lhm@ujs.edu.cn.
authors.forename: Huaming
authors.initials: H
authors.lastname: Li
keywords: Bi(4)O(5)Br(2); Bisphenol-A; Photocatalysis; Reactable ionic liquid