Novel B-doped BiOCl nanosheets with exposed (001) facets and photocatalytic mechanism of enhanced degradation efficiency for organic pollutants

Changlin Yu; Hongbo He; Qizhe Fan; Wenyu Xie; Zhen Liu; Hongbing Ji

doi:10.1016/j.scitotenv.2019.133727

Novel B-doped BiOCl nanosheets with exposed (001) facets and photocatalytic mechanism of enhanced degradation efficiency for organic pollutants

Sci Total Environ. 2019 Dec 1:694:133727. doi: 10.1016/j.scitotenv.2019.133727. Epub 2019 Aug 3.

Authors

Changlin Yu¹, Hongbo He², Qizhe Fan³, Wenyu Xie³, Zhen Liu³, Hongbing Ji⁴

Affiliations

¹ School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China. Electronic address: yuchanglinjx@163.com.
² School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510000, Guangdong, China; School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519000, Guangdong, China.
³ School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China.
⁴ School of Chemical Engineering, Guangdong Province Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China. Electronic address: jihb@mail.sysu.edu.cn.

PMID: 31400684
DOI: 10.1016/j.scitotenv.2019.133727

Abstract

Novel B doped BiOCl nanocrystals (B-BiOCl) with exposed (001) facets were fabricated via a facile solvothermal route. The characterization methods of XRD, BET, SEM, TEM, UV-vis DRS, PL, EIS, ESR and photocurrent measurement were performed to investigate the physicochemical properties of the B-BiOCl samples. The results indicated that doping B into BiOCl could regulate and control the growth of (001) crystal facet, increase the specific surface areas and enhance the efficiency of charge separation. Hence, the optimal B_1.0-BiOCl (atomic ratio of Bi:O:Cl: B is around 27.41: 28.27:25.43:3.55) exhibited significant promoting effect for the degradation of phenol, bisphenol A and rhodamine B than that of pure of BiOCl. The results of radical capturing and ESR analysis confirmed that the O₂^- radicals played a fatal role in the degradation of organic pollutants. This work could be expected to offer a new insight into design and synthesis of highly efficient photocatalyst with specific exposed facets by doping non-metallic elements.

Keywords: (001) crystal facets; B-doping; BiOCl; Organic pollutants; Photocatalysis.