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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Chem. | doi: 10.3389/fchem.2019.00649

Synthesis of flower-like g-C3N4/BiOBr nanosheets and enhancement of the activity for the degradation of bisphenol A under visible light irradiation

 Zhao J. Sheng1*, wu jun2,  xie yu2*, dong y. yun1, ling yun2 and xu q. hua2
  • 1Liaocheng University, China
  • 2Nanchang Hangkong University, China

The high recombination rates of photogenerated electron-holes inhibit greatly the catalytic activity of semiconductor photocatalyst. Herein, the heterojunctions of flower-like g-C3N4/BiOBrcomposites were synthesized as photocatalysts by a simple hydrothermal process. The X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectrometer were utilized to characterize the sample's structure and light absorption properties. The results demonstrated that BiOBr-g-C3N4-4:1 showed excellent photocatalytic properties and 96.6% of bisphenol (BPA) was removed in 120 min with illumination of visible light due to its narrower band gap than that of pure BiOBr. BiOBr offer little electrons during the photocatalytic reaction. Moreover, the heterostructure between BiOBr and g-C3N4 facilitates the separationsof photogenerated carries. Excellent stability was exhibited after five cyclic degradation of methyl orange (MO) with the illumination of visible light. The active species trapping experiment indicated that superoxide radical anions (O2•-) and hole (h+) have a great effect on the reaction. A possible mechanism was proposed to explain the whole process of photocatalytic reaction.

Keywords: BiOBr/g-C3N4, photocatalysts, Heterojunctions, Bisphenol (BPA), photodegradation

Received: 29 May 2019; Accepted: 10 Sep 2019.

Copyright: © 2019 Sheng, jun, yu, yun, yun and hua. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Prof. Zhao J. Sheng, Liaocheng University, Liaocheng, China, j.s.zhao@163.com
Mx. xie yu, Nanchang Hangkong University, Nanchang, 130012, Jiangxi Province, China, xieyu_121@163.com