Novel scheme towards interfacial charge transfer between ZnIn2S4 and BiOBr for efficient photocatalytic removal of organics and chromium (VI) from water

Zuming He; Hanpei Yang; Jaka Sunarso; Ngie Hing Wong; Zhengyi Huang; Yongmei Xia; Yong Wang; Jiangbin Su; Lina Wang; Li Kang

doi:10.1016/j.chemosphere.2022.134973

Novel scheme towards interfacial charge transfer between ZnIn₂S₄ and BiOBr for efficient photocatalytic removal of organics and chromium (VI) from water

Chemosphere. 2022 Sep;303(Pt 1):134973. doi: 10.1016/j.chemosphere.2022.134973. Epub 2022 May 16.

Authors

Zuming He¹, Hanpei Yang², Jaka Sunarso³, Ngie Hing Wong⁴, Zhengyi Huang⁵, Yongmei Xia⁶, Yong Wang⁷, Jiangbin Su⁸, Lina Wang⁹, Li Kang⁹

Affiliations

¹ Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China; Huaide School, Changzhou University, Jingjiang, 214500, PR China; School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213164, PR China. Electronic address: hezuming432928@126.com.
² Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China. Electronic address: yanghanpei@hhu.edu.cn.
³ Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350, Kuching, Sarawak, Malaysia.
⁴ Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350, Kuching, Sarawak, Malaysia. Electronic address: nhwong@swinburne.edu.my.
⁵ Huaide School, Changzhou University, Jingjiang, 214500, PR China.
⁶ School of Materials and Engineering, Jiangsu University of Technology, Changzhou, 213001, PR China.
⁷ School of Pharmaceutical and Materials Engineering, Taizhou University, Jiaojiang, 318000, PR China.
⁸ School of Microelectronics and Control Engineering, Changzhou University, Changzhou, 213164, PR China.
⁹ Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, PR China.

PMID: 35588882
DOI: 10.1016/j.chemosphere.2022.134973

Abstract

Construction of Z-scheme heterostructure is an effective strategy to enhance the charge carriers' separation. However, successfully achieving this on the defect heterojunction to improve the photocatalytic activity remains challenging. This work successfully obtained sulfur vacancy in the ZnIn₂S₄/BiOBr (SZIS/BOB) heterojunction composites with S-O covalent bonding using a hydrothermal method. As a result, they exhibited superior photocatalytic and stability performance. The optimized SZIS/BOB-10 exhibited excellent rhodamine B degradation (95.2%) and chromium (VI) reduction (97.8%) within 100 min under visible light. The enhanced composites with S-vacancies, S-O bond, and internal electric field induced the Z-scheme charge transfer mechanism. We had verified this mechanism based on the surface photovoltage spectra, electron spin response spectra, and density functional theory calculations. This work not only provides valuable insights into designing photocatalysts with a direct Z scheme heterostructure but also delineates a promising strategy for developing efficient photocatalysts to degrade organic pollutants.

Keywords: BiOBr; DFT calculation; S–O bonds; Z-scheme heterojunction; ZnIn(2)S(4).

MeSH terms

Bismuth
Chromium*
Software
Water*

Substances

Water
Chromium
chromium hexavalent ion
bismuth oxybromide
Bismuth