Shaddock peel-derived N-doped carbon quantum dots coupled with ultrathin BiOBr square nanosheets with boosted visible light response for high-efficiency photodegradation of RhB

Yu Qi; Jinjiang Zhao; Hongtao Wang; Aiming Zhang; Jinping Li; Meifang Yan; Tianyu Guo

doi:10.1016/j.envpol.2023.121424

Shaddock peel-derived N-doped carbon quantum dots coupled with ultrathin BiOBr square nanosheets with boosted visible light response for high-efficiency photodegradation of RhB

Environ Pollut. 2023 May 15:325:121424. doi: 10.1016/j.envpol.2023.121424. Epub 2023 Mar 9.

Authors

Yu Qi¹, Jinjiang Zhao¹, Hongtao Wang¹, Aiming Zhang², Jinping Li³, Meifang Yan¹, Tianyu Guo⁴

Affiliations

¹ College of Environment Science and Engineering, Taiyuan University of Technology, No. 209 University Street, Jinzhong 030600, Shanxi, PR China.
² Department of Nuclear Environment Science, China Institute for Radiation Protection, No.102 Xuefu Street, Taiyuan 030006, Shanxi, PR China.
³ College of Chemistry and Chemical Engineering, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan 030024, Shanxi, PR China; Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, No.79 Yingze west street, Taiyuan 030024, Shanxi, PR China.
⁴ College of Environment Science and Engineering, Taiyuan University of Technology, No. 209 University Street, Jinzhong 030600, Shanxi, PR China; Department of Nuclear Environment Science, China Institute for Radiation Protection, No.102 Xuefu Street, Taiyuan 030006, Shanxi, PR China; Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, No.79 Yingze west street, Taiyuan 030024, Shanxi, PR China. Electronic address: tyguo1117x@163.com.

PMID: 36906054
DOI: 10.1016/j.envpol.2023.121424

Abstract

In the present work, we constructed a serials of novel shaddock peel-derived N-doped carbon quantum dots (NCQDs) coupled with BiOBr composites. The result showed that the as-synthesized BiOBr (BOB) was composed of ultrathin square nanosheets and flower-like structure, and NCQDs were uniformly dispersed on the surface of BiOBr. Furthermore, the BOB@NCQDs-5 with optimal NCQDs content displayed the top-flight photodegradation efficiency with ca. 99% of removal rate within 20 min under visible light and possessed excellent recyclability and photostability after 5 cycles. The reason was attributed to relatively large BET surface area, the narrow energy gap, inhibited recombination of charge carriers and excellent photoelectrochemical performances. Meanwhile, the improved photodegradation mechanism and possible reaction pathways were also elucidated in detail. On this basis, the study opens a novel perspective to obtain a highly efficient photocatalyst for practical environment remediation.

Keywords: BiOBr; Biomass; NCQDs; Photocatalytic degradation; Ultrathin nanosheets.

Publication types

Review

MeSH terms

Carbon
Catalysis
Light
Photolysis
Quantum Dots*

Substances

Carbon
bismuth oxybromide