Boosting electron transport process over multiple channels induced by S-doped carbon and Fe7S8 NPs interface toward high-efficiency antibiotics removal

Xiao Zhang; Jiankang Wang; Yahui Wang; Zhongping Yao; Wanqian Guo; Hongbo Xu; Zhaohua Jiang

doi:10.1016/j.jhazmat.2022.130115

Boosting electron transport process over multiple channels induced by S-doped carbon and Fe₇S₈ NPs interface toward high-efficiency antibiotics removal

J Hazard Mater. 2023 Jan 15:442:130115. doi: 10.1016/j.jhazmat.2022.130115. Epub 2022 Oct 3.

Authors

Xiao Zhang¹, Jiankang Wang², Yahui Wang³, Zhongping Yao⁴, Wanqian Guo⁵, Hongbo Xu¹, Zhaohua Jiang¹

Affiliations

¹ School of Chemistry and Chemical Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, China.
² College of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China.
³ State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China.
⁴ School of Chemistry and Chemical Engineering, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, China. Electronic address: yaozhongping@hit.edu.cn.
⁵ School of Environmental Engineering, Harbin Institute of Technology, Harbin 150001, China.

PMID: 36303349
DOI: 10.1016/j.jhazmat.2022.130115

Abstract

The enhancement of electron transport process on multiple channels of C-Fe and C-S-Fe bonds between dual-reaction centres was investigated for stimulating the antibiotics degradation in Fenton-like processes. Herein, multiple channels structure of sulfur-doped carbon coupled Fe₇S₈ cluster through C-Fe bond and C-S-Fe bond was constructed through density functional theory (DFT), and S-doped carbon framework coated Fe₇S₈ nanoparticles (Fe₇S₈/SC) Fenton-like catalyst was prepared through hydrothermal and subsequent sulfuration process. The DFT calculations revealed that electrons are thermodynamically transferred from carbon to iron along both C-Fe and C-S-Fe bonds. The optimized Fe₇S₈/SC catalyst exhibited desirable catalytic property for Fenton-like degradation for various antibiotics, the removal of amoxicillin, norfloxacin, and tetracycline hydrochloride reach 98.9%, 97.8%, and 99.3% respectively within 40 min under neutral pH, and catalyst also demonstrated excellent cycle stability after five runs. The excellent degradation effect of antibiotics by Fenton-like catalyst was attributed to the intensified electron transport process by multiple electron transfer channels between dual reaction centres, making Fe^II easier to regenerate. This study spreads a new route for the enhancement of electron transport process in Fenton-like catalysts by constructing multiple channels.

Keywords: C−Fe bond; C−S−Fe bond; Dual-reaction centres; Fe(7)S(8)/SC catalyst; Fenton-like degradation.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anti-Bacterial Agents*
Carbon
Catalysis
Electron Transport
Electrons*
Hydrogen Peroxide / chemistry

Substances

Anti-Bacterial Agents
Carbon
Hydrogen Peroxide
S(8)