Facile one-step strategy for the formation of BiOIO3/[Bi6O6(OH)3](NO3)3·1.5H2O heterojunction to enhancing photocatalytic activity

Li Kan; Liping Yang; Weina Mu; Qiong Wang; Xinyue Wang; Chun Chang

doi:10.1016/j.jcis.2021.12.153

Facile one-step strategy for the formation of BiOIO₃/[Bi₆O₆(OH)₃](NO₃)₃·1.5H₂O heterojunction to enhancing photocatalytic activity

J Colloid Interface Sci. 2022 Apr 15:612:401-412. doi: 10.1016/j.jcis.2021.12.153. Epub 2021 Dec 29.

Authors

Li Kan¹, Liping Yang², Weina Mu¹, Qiong Wang³, Xinyue Wang³, Chun Chang⁴

Affiliations

¹ College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China.
² College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
³ College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China; Institute of Ocean Research, Bohai University, Jinzhou 121013, China.
⁴ College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China; Institute of Ocean Research, Bohai University, Jinzhou 121013, China. Electronic address: cchang2019@bhu.edu.cn.

PMID: 34999545
DOI: 10.1016/j.jcis.2021.12.153

Abstract

The heterojunction photocatalyst, BiOIO₃/[Bi₆O₆(OH)₃](NO₃)₃·1.5H₂O (BiOIO₃/BBN), was successfully synthesized by a simple one-step hydrothermal method. The results showed that under UV light irradiation, the formation of a heterojunction could greatly enhance the photocatalytic efficiency of the prepared catalyst for bisphenol A (BPA). The BiOIO₃/BBN heterostructure had the best reaction rate constant, which was 81.82 times, 1.52 times, and 43.40 times improvement of TiO₂, BiOIO₃, and BBN respectively. Through the free radical capture experiments and electron spin resonance spectroscopy, it was conducted that ¹O₂, h⁺, e^-, •OH and •O₂^- were reactive species in the process of photocatalytic degradation of BPA. The photocatalytic mechanism was further investigated and confirmed that the BiOIO₃/BBN heterojunction could improve the separation and transfer of photo-generated carriers, thereby greatly enhancing the catalytic efficiency. The degradation products of BPA were detected by HPLC-MS, and the degradation reaction pathway was deduced.

Keywords: BiOIO(3)/[Bi(6)O(6)(OH)(3)] (NO(3))(3)·1.5H(2)O heterojunction; Bisphenol A; One-step synthesis; Photocatalysis; Reaction pathway.

MeSH terms

Catalysis
Light*
Ultraviolet Rays*