CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
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
2015
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume439Pages:98—104
Subtype期刊文献
AbstractIt 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.
KeywordC-60 Radical-cation Photocatalytic Activity Electron-transfer Pulse-radiolysis Single-wall Laser Photolysis Water Tio2 Generation Transformations
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24599
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
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.
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