Graphene oxide enwrapped polyimide composites with efficient photocatalytic activity for 2,4-dichlorophenol degradation 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 > 环境化学与生态毒理学国家重点实验室

	Graphene oxide enwrapped polyimide composites with efficient photocatalytic activity for 2,4-dichlorophenol degradation under visible light irradiation
	Gong, Yan ; Yang, Bo ; Zhang, Hui ; Zhao, Xu ; Zhu, Caizhen
刊名	MATERIALS RESEARCH BULLETIN
	2019-04
卷号	112 页码:115-123
关键词	Photocatalysis Polyimide GO Heterojuction 2,4-dichlorophenol
ISSN号	0025-5408
英文摘要	In this study, graphene oxide (GO) enwrapped polyimide (PI) composite photocatalyst was prepared via a facile ultrasonic chemical method. The as-synthesized GO/PI hybrid composite can serve as a stable metal-free photocatalyst for 2,4-dichlorophenol (2,4-DCP) degradation under visible-light irradiation. After loading of GO, the GO/PI composites displayed enhanced photocatalytic performance. The apparent rate constant for 2,4-DCP degradation of the composites was approximately 4.5 times as high as that of bare PI. The results of radical trapping experiments and electron spin resonance indicated that the photogenerated hole (h(+)) and O-center dot(2)- were the main responsible for the 2,4-DCP degradation. The energy band diagram derived from Mott-Schottky and UV-vis diffuse absorption spectra revealed that the formed heterojunction between PI and GO is type-II. The formed heterojunction with well matched energy levels leads to an efficient injection of photoinduced electrons from PI to GO, and facilitates the separation of photoinduced charge carrier. The combined transient photo current and electrochemical impedance spectroscopy results further verified the enhancement was mainly ascribed to the improved charge carrier separation performance of composite.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42953]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Peoples R China 2.Chinese Acad Sci, Key Lab Drinking Water Sci & Technol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 3.Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 4.Shenzhen Univ, Shenzhen Key Lab Environm Chem & Ecol Remediat, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Gong, Yan,Yang, Bo,Zhang, Hui,et al. Graphene oxide enwrapped polyimide composites with efficient photocatalytic activity for 2,4-dichlorophenol degradation under visible light irradiation[J]. MATERIALS RESEARCH BULLETIN,2019,112:115-123.
APA	Gong, Yan,Yang, Bo,Zhang, Hui,Zhao, Xu,&Zhu, Caizhen.(2019).Graphene oxide enwrapped polyimide composites with efficient photocatalytic activity for 2,4-dichlorophenol degradation under visible light irradiation.MATERIALS RESEARCH BULLETIN,112,115-123.
MLA	Gong, Yan,et al."Graphene oxide enwrapped polyimide composites with efficient photocatalytic activity for 2,4-dichlorophenol degradation under visible light irradiation".MATERIALS RESEARCH BULLETIN 112(2019):115-123.