Efficient photocatalytic degradation of volatile organic compounds over carbon quantum dots decorated Bi2WO6 under visible light

Yangqing Liu; Changjun Zhu; Jingwen Sun; Yan Ge; Fujiao Song; Guanzhong Wang; Qi Xu

doi:10.1007/s11356-020-12273-y

Efficient photocatalytic degradation of volatile organic compounds over carbon quantum dots decorated Bi₂WO₆ under visible light

Environ Sci Pollut Res Int. 2021 May;28(20):25949-25958. doi: 10.1007/s11356-020-12273-y. Epub 2021 Jan 22.

Authors

Yangqing Liu^#^{1

2}, Changjun Zhu^#^{1

3

4}, Jingwen Sun^{1

3}, Yan Ge^{1

3}, Fujiao Song^{1

2}, Guanzhong Wang⁴, Qi Xu^{5

6}

Affiliations

¹ School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China.
² Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
³ Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
⁴ Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing, 210093, People's Republic of China.
⁵ School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224000, People's Republic of China. ycxqsteve@163.com.
⁶ Key Laboratory under Construction for Volatile Organic Compounds Controlling of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China. ycxqsteve@163.com.

^# Contributed equally.

PMID: 33479875
DOI: 10.1007/s11356-020-12273-y

Abstract

A series of CQDs/Bi₂WO₆ (CBW) hybrid materials with different loading amounts of carbon quantum dots (CQDs) were prepared via a facile in situ hydrothermal method. As determined by multiple techniques including XRD, TEM, UV-vis, PL, TPR, and XPS, the CBW possessed expanded visible light response interval, decreased recombination rate of the photogenerated electron hole, and enhanced oxidation ability as compared with the pristine Bi₂WO₆. In addition, with different loading amounts of CQDs, the optical and electronic properties of the corresponding CBW were different. These CBW materials performed superior activities to the pristine Bi₂WO₆ in the photodegradation of VOCs under visible light, among which the CBW-2 demonstrated the best activity of almost complete degradation within only 120 min. Moreover, the CBW-2 exhibited high stability and reusability after five cycles.

Keywords: Bi2WO6; CQDs; Photocatalysis; VOCs; Visible light.

MeSH terms

Carbon
Catalysis
Light
Quantum Dots*
Volatile Organic Compounds*

Substances

Volatile Organic Compounds
Carbon