Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A

Jiexiang Xia; Yuping Ge; Jun Di; Li Xu; Sheng Yin; Zhigang Chen; Pengjun Liu; Huaming Li

doi:10.1016/j.jcis.2016.03.046

Ionic liquid-assisted strategy for bismuth-rich bismuth oxybromides nanosheets with superior visible light-driven photocatalytic removal of bisphenol-A

J Colloid Interface Sci. 2016 Jul 1:473:112-9. doi: 10.1016/j.jcis.2016.03.046. Epub 2016 Mar 19.

Authors

Jiexiang Xia¹, Yuping Ge², Jun Di², Li Xu², Sheng Yin², Zhigang Chen³, Pengjun Liu⁴, Huaming Li⁵

Affiliations

¹ 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.
² School of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
³ School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, PR China.
⁴ Hainan Institute of Science and Technology, Hainan, Haikou 571126, PR China.
⁵ 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.

PMID: 27061362
DOI: 10.1016/j.jcis.2016.03.046

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.

Keywords: Bi(4)O(5)Br(2); Bisphenol-A; Photocatalysis; Reactable ionic liquid.

Publication types

Research Support, Non-U.S. Gov't