The photochemistry of carbon nanotubes and its impact on the photo-degradation of dye pollutants in aqueous solutions

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	The photochemistry of carbon nanotubes and its impact on the photo-degradation of dye pollutants in aqueous solutions
	Wu, BD; Zhu, DX; Zhang, SJ; Lin, WZ; Wu, GZ; Pan, BC
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2015
卷号	439 页码:98—104
关键词	C-60 RADICAL-CATION PHOTOCATALYTIC ACTIVITY ELECTRON-TRANSFER PULSE-RADIOLYSIS SINGLE-WALL LASER PHOTOLYSIS WATER TIO2 GENERATION TRANSFORMATIONS
英文摘要	It is reported that carbon nanotubes (CNTs) could either generate reactive oxygen species (ROS) under light irradiation or serve as high-efficient scavenger for ROS. However, it is unclear which role predominates as CNTs enter into aquatic environment. To answer this question, a systematic study of the photochemistry of a pristine and a surface-functionalized CNTs in aqueous suspensions was investigated with both time-resolved and steady state analytical approaches. The transient absorption spectra demonstrate that CNTs could be photo-ionized and trap hydrated electrons upon high energy irradiation. In steady state UV irradiation, CNTs could promote the generation of ROS, such as O-1(2) and (OH)-O-center dot. However, in the presence of H2O2, the (OH)-O-center dot scavenging effect predominated in the aqueous suspensions of CNTs. The presence of CNTs suppressed the photo-degradation of dye pollutants, as an integrated result of inner filter effect, adsorption effect, and ROS generation and scavenging effect. The results provide useful information for the understanding of the environmental implications of CNTs. (C) 2014 Elsevier Inc. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/24599]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Wu, BD,Zhu, DX,Zhang, SJ,et al. The photochemistry of carbon nanotubes and its impact on the photo-degradation of dye pollutants in aqueous solutions[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2015,439:98—104.
APA	Wu, BD,Zhu, DX,Zhang, SJ,Lin, WZ,Wu, GZ,&Pan, BC.(2015).The photochemistry of carbon nanotubes and its impact on the photo-degradation of dye pollutants in aqueous solutions.JOURNAL OF COLLOID AND INTERFACE SCIENCE,439,98—104.
MLA	Wu, BD,et al."The photochemistry of carbon nanotubes and its impact on the photo-degradation of dye pollutants in aqueous solutions".JOURNAL OF COLLOID AND INTERFACE SCIENCE 439(2015):98—104.