Insight on the optimized electronic structure of carbon nitride on ultrafast water treatment via photocatalytic activation of ferrate

Ningxuan Xue; Zhaobing Guo; Xinyu Gai; Yiyang Chen; Siyue He; Guanjie Lin; Fengling Liu; Shuai Zhang; Pengxiang Qiu

doi:10.1016/j.jhazmat.2024.137029

Insight on the optimized electronic structure of carbon nitride on ultrafast water treatment via photocatalytic activation of ferrate

J Hazard Mater. 2024 Dec 31:486:137029. doi: 10.1016/j.jhazmat.2024.137029. Online ahead of print.

Authors

Ningxuan Xue¹, Zhaobing Guo², Xinyu Gai¹, Yiyang Chen¹, Siyue He¹, Guanjie Lin¹, Fengling Liu¹, Shuai Zhang¹, Pengxiang Qiu³

Affiliations

¹ Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology (CIC-AEET), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China.
² Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology (CIC-AEET), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Suqian University, Suqian 223800, China. Electronic address: [email protected].
³ Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology (CIC-AEET), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China. Electronic address: [email protected].

PMID: 39742859
DOI: 10.1016/j.jhazmat.2024.137029

Abstract

Ferrate (Fe(VI)) is a widely used water purifier and is easily affected by external factors. Given that the actual water environment conditions are complicated, this study designed an oxygen-doped carbon nitride (CNO) with rich electron sites to explore whether direct electron transfer promotes the degradation efficiency of Fe(VI) for pollutants under visible light. For comparison, we also prepared phosphorus-doped carbon nitride (CNP), which has electron-deficient sites and indirect electron transfer. In the CNO/Fe(VI)/light system, not only more high-valent iron and reactive oxygen species were generated, but also the pollutant degradation rate, reaction kinetics, and electron yield were significantly better than those of the CNP and CN systems, verifying the superiority of direct electron transfer. In addition, CNO showed excellent performance in both actual solar photocatalysis and continuous flow experiments. Therefore, the photocatalysis/direct electron transfer mechanism proposed provides an innovative strategy for improving the application potential of Fe(VI) in the field of pollution control and its industrialization application.

Keywords: Direct electron transfer; Ferrate (Fe(VI)); Oxygen-doped carbon nitride; Visible light photocatalysis.