Co3O4 modified polymeric carbon nitride for external light-free chlorine activating degradation of organic pollutants

Qi Guo; Hongjie Song; Mingxia Sun; Xiaohan Yuan; Yingying Su; Yi Lv

doi:10.1016/j.jhazmat.2021.128193

Co₃O₄ modified polymeric carbon nitride for external light-free chlorine activating degradation of organic pollutants

J Hazard Mater. 2022 May 5:429:128193. doi: 10.1016/j.jhazmat.2021.128193. Epub 2021 Dec 31.

Authors

Qi Guo¹, Hongjie Song², Mingxia Sun¹, Xiaohan Yuan¹, Yingying Su³, Yi Lv²

Affiliations

¹ Analytical & Testing Center, Sichuan University, Chengdu 610064, China.
² Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
³ Analytical & Testing Center, Sichuan University, Chengdu 610064, China. Electronic address: suyinging@scu.edu.cn.

PMID: 35086034
DOI: 10.1016/j.jhazmat.2021.128193

Abstract

Advanced oxidation processes (AOPs) activated by chlorine have emerged as a green and efficient strategy for water treatment and have attracted widespread attention. However, most of them require continuous UV radiation during the degradation reaction, which increases the cost and is not conducive to practical application, in some ways. Hererin we proposed an external light-free chlorine activation methodology for the removal of organic pollutants with the assistance of the intrinsic chemiluminescence (CL) in the system. A very interesting phenomenon, 20-fold enhanced CL of Co₃O₄ nanoparticles modified polymeric carbon nitride (PCN/Co₃O₄) was observed in the presence of hypochlorous acid (HClO), compared with the pristine PCN nanosheets. Without ultraviolet (UV), even any other light-emitting devices, the strong intrinsic CL in the PCN/Co₃O₄-HClO system was found to be conducive to chlorine activation degradation of organic pollutants. The inner connection between the CL of the PCN/Co₃O₄-HClO system and the chlorine-based AOPs was further explored.

Keywords: Chemiluminescence; Degradation; Light-free chlorine activation; PCN/Co(3)O(4).