A novel synthetic carbon and oxygen doped stalactite-like g-C3N4 for broad-spectrum-driven indometacin degradation

Xiaoshan Zheng; Qianxin Zhang; Tiansheng Chen; Yuliang Wu; Jun Hao; Cuiwen Tan; Ping Chen; Fengliang Wang; Haijin Liu; Wenying Lv; Guoguang Liu

doi:10.1016/j.jhazmat.2019.121961

A novel synthetic carbon and oxygen doped stalactite-like g-C₃N₄ for broad-spectrum-driven indometacin degradation

J Hazard Mater. 2020 Mar 15:386:121961. doi: 10.1016/j.jhazmat.2019.121961. Epub 2019 Dec 26.

Authors

Affiliations

¹ School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
² School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China; School of Environment, Tsinghua University, Beijing, 100084, China.
³ Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, School of Environment, Henan Normal University, Xinxiang 453007, China.
⁴ School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address: lvwy612@163.com.
⁵ School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address: liugg615@163.com.

PMID: 31901544
DOI: 10.1016/j.jhazmat.2019.121961

Abstract

Achieving efficient solar utilization is a primary goal in the field of photocatalytic degradation of PPCPs. For this study, a broad-spectrum carbon and oxygen doped, porous g-C₃N₄ (COCN) was synthesized via a simple co-pyrolysis of dicyandiamide and methylamine hydroiodide (CH₅N·HI). The 0.3COCN demonstrated an excellent photocatalytic degradation of indometacin (IDM), which was 5.9 times higher than bulk g-C₃N₄. The enhanced photocatalytic activity could be ascribed to the broad-spectrum utilization of solar light and improved charge separation efficiency. Reactive species (RSs) scavenging experiments have shown that O₂^·- and ¹O₂ were the dominant active species. Further, the 0.3COCN exhibits excellent yield of hydroxyl radicals which was confirmed by electron spin resonance (ESR) spectra. Meanwhile, the degradation pathways of IDM were proposed according the HRAM LC-MS/MS and total organic carbon (TOC). This research provided a new strategy for a broad-spectrum photocatalyst, and a promising strategy for environmental remediation.

Keywords: Broad-spectrum; Graphitic carbon nitride; IDM; Mechanism.

Publication types

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

MeSH terms

Catalysis
Electron Transport / radiation effects
Hydrogen Peroxide / chemistry
Indomethacin / analysis*
Light*
Nitriles / chemistry*
Nitriles / radiation effects
Oxidation-Reduction
Oxygen / chemistry*
Photolysis*
Porosity
Surface Properties
Water Pollutants, Chemical / analysis*

Substances

Nitriles
Water Pollutants, Chemical
cyanogen
Hydrogen Peroxide
Oxygen
Indomethacin