Internal electric field construction on dual oxygen group-doped carbon nitride for enhanced photodegradation of pollutants under visible light irradiation

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Internal electric field construction on dual oxygen group-doped carbon nitride for enhanced photodegradation of pollutants under visible light irradiation
	Li, Fan ; Han, Muen ; Jin, Yang ; Zhang, Lili ; Li, Tong ; Gao, Yaowen ; Hu, Chun
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2019-11-05
卷号	256 页码:-
关键词	LED photocatalyst pollutant degradation carbon nitride dual oxygen group internal electric field
ISSN号	0926-3373
英文摘要	Graphitic carbon nitride (g-C3N4), as metal-free and visible-light-driven photocatalyst, has been a promising alternative to replace the traditional inorganic photocatalyst. Herein, a dual oxygen group (C-O-C and C = O) doped carbon nitride (ACN) was prepared by a two-step thermal treatment process. The photocatalyst showed high and stable photocatalytic activity for the degradation and mineralization of refractory organic pollutants under visible light irradiation, as demonstrated with bisphenol A, phenol, 2-chlorphenol and diphenhydramine. By electron paramagnetic resonance spectroscopy and density functional theory calculations, higher valence-electron densities were formed around the O atoms of C-O-C and C = O groups than around C and N atoms, constructing an internal electric field in ACN, which was enhanced by light irradiation and the adsorption of pollutants by hydrogen bond and n-n bond interactions. Correspondingly, transfer processes of photogenerated carriers were proposed based on all experimental information obtained for pollutant photodegradation, including transfer of photoexcited electrons to the region around O atoms in the two types of oxygen groups, reaction with O-2 to form center dot O- 2, and donation of electrons from adsorbed pollutants to electron-poor tri-s-triazine motifs in ACN*. The synergetic oxidation by the two processes contributed to higher photodegradation of pollutants. This correlation between the transfer of photogenerated carries and pollutant degradation shed a new light on the construction of internal electric field in carbon nitride photocatalysis.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43482]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Inst Environm Res Greater Bay, Guangzhou 510006, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Fan,Han, Muen,Jin, Yang,et al. Internal electric field construction on dual oxygen group-doped carbon nitride for enhanced photodegradation of pollutants under visible light irradiation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,256:-.
APA	Li, Fan.,Han, Muen.,Jin, Yang.,Zhang, Lili.,Li, Tong.,...&Hu, Chun.(2019).Internal electric field construction on dual oxygen group-doped carbon nitride for enhanced photodegradation of pollutants under visible light irradiation.APPLIED CATALYSIS B-ENVIRONMENTAL,256,-.
MLA	Li, Fan,et al."Internal electric field construction on dual oxygen group-doped carbon nitride for enhanced photodegradation of pollutants under visible light irradiation".APPLIED CATALYSIS B-ENVIRONMENTAL 256(2019):-.