In Situ Synthesis of 3D BiOCl-Graphene Aerogel and Synergistic Effect by Photo-Assisted Activation of Persulfate for Methyl Orange Degradation

Yukun Li; Dan Zhang; Yongshu Zhang; Cong Chao; Qishi Chen; Sen Yao; Cuixia Liu

doi:10.3390/molecules28134964

In Situ Synthesis of 3D BiOCl-Graphene Aerogel and Synergistic Effect by Photo-Assisted Activation of Persulfate for Methyl Orange Degradation

Molecules. 2023 Jun 24;28(13):4964. doi: 10.3390/molecules28134964.

Authors

Yukun Li¹, Dan Zhang², Yongshu Zhang¹, Cong Chao¹, Qishi Chen¹, Sen Yao¹, Cuixia Liu¹

Affiliations

¹ School of Energy and Environmental Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China.
² Science and Technology Innovation Coordination Service Center of Laiwu District, Jinan 271100, China.

Abstract

BiOCl/graphene aerogel graphene (BGA) was successfully obtained by in situ hydrothermal synthesis, and the chemical, structural, morphological, and photocatalytic properties were systematically characterized. BGA with the doping amount of BiOCl at 20% (BGA-4) exhibited the optimal activation efficiency for persulfate (PDS) on the degradation of methyl orange (MO) under simulated sunlight (SSL) illumination as compared to the pure graphene (GA) and aerogel composites with different BiOCl content. The influence of various reaction parameters on the MO removal efficiency, such as the reaction system, catalyst activator dose, PDS concentration, BiOCl doping amount, and the initial pH of the solution, was investigated. Under optimum conditions, the catalytic efficiency of BiOCl-doped GA with the mass ratio of 20% (BGA-4) was 5.61 times that of GA. The strengthening effect of BGA-4 benefited from the synergistic effect of ¹O₂, O₂·^- and the generation and rapid electron transfer of photo-induced electron (e^-) in the BGA-4/SSL/PDS system. Considering the superior stability and recyclability of BGA-4, the BGA-4/SSL/PDS system exhibits great potential in actual wastewater treatment.

Keywords: BiOCl; graphene aerogel; persulfate; photocatalytic activation; simulated sunlight.

MeSH terms

Azo Compounds
Electron Transport
Graphite* / chemistry
Sunlight

Substances

Graphite
methyl orange
Azo Compounds

Grants and funding

This research was funded by the NSFC (Grants No. 22076039, 51808199), the China Postdoctoral Science Foundation (Grant No. 2018M630825, 2019T120624), and the Excellent Science and Technology Innovation Team of Henan Normal University (2021TD03).