Near-infrared light to heat conversion in peroxydisulfate activation with MoS2: A new photo-activation process for water treatment

Renli Yin; Binghua Jing; Shaoxiong He; Jiayue Hu; Gang Lu; Zhimin Ao; Chuanyi Wang; Mingshan Zhu

doi:10.1016/j.watres.2020.116720

Near-infrared light to heat conversion in peroxydisulfate activation with MoS₂: A new photo-activation process for water treatment

Water Res. 2021 Feb 15:190:116720. doi: 10.1016/j.watres.2020.116720. Epub 2020 Dec 2.

Authors

Renli Yin¹, Binghua Jing², Shaoxiong He¹, Jiayue Hu¹, Gang Lu¹, Zhimin Ao³, Chuanyi Wang⁴, Mingshan Zhu⁵

Affiliations

¹ Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China.
² Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
³ Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: zhimin.ao@gdut.edu.cn.
⁴ School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, China.
⁵ Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China. Electronic address: zhumingshan@jnu.edu.cn.

PMID: 33310437
DOI: 10.1016/j.watres.2020.116720

Abstract

The advantage of light-to-heat conversion can be employed as an optical alternative for environmental remediation. As a proof of concept, for the first time we introduce the light-to-heat conversion application in peroxydisulfate (PDS) activation by molybdenum disulphide (MoS₂) under near infrared (NIR) light irradiation. Theoretical kinetics analysis suggests that the reaction rates of PDS activation is increased up to 9.2 times when increasing from room temperature to 50 °C. MoS₂ has the capability to quickly convert NIR light to heat energy (~45°C), thereby being able to activate PDS to generate hydroxyl and sulfate radicals. The observed reaction rate of carbamazepine degradation by NIR/MoS₂/PDS process is 6.5 times of that in MoS₂/PDS and even 2.6 times higher than the sum of those in NIR/MoS₂, MoS₂/PDS and NIR/PDS processes. Combining with theoretical calculation and oxidation species analysis, a new photo-activation PDS mechanism is proposed, in which MoS₂ absorbs the energy of light to generate heat energy for overcoming the energy barrier of PDS activation. By loading MoS₂ on carbon cloths, a flexible photothermal membrane is designed for practical application of sunlight-to-heat conversion to activate PDS with high efficiency, stability, and recycling. The present results demonstrate the potential of applying light-to-heat conversion in Fenton-like processes in pollution control, which opens new avenues towards utilization of inexhaustible solar energy and novel approaches for environmental remediation.

Keywords: Light-to-heat conversion; Membrane; MoS(2); Near-infrared light; Peroxydisulfate.

MeSH terms

Environmental Restoration and Remediation*
Hot Temperature
Molybdenum
Oxidation-Reduction
Water Purification*

Substances

Molybdenum