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Tytuł pozycji:

Effective defect generation and dual reaction pathways for phenol degradation on boron-doped carbon nanotubes.

Tytuł :
Effective defect generation and dual reaction pathways for phenol degradation on boron-doped carbon nanotubes.
Autorzy :
Li X; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.; Department of Environmental Engineering and Technology, China Institute for Radiation Protection, Taiyuan, People's Republic of China.
Liang D; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.
Wang C; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.
Li Y; Department of Environmental Engineering and Technology, China Institute for Radiation Protection, Taiyuan, People's Republic of China.
Duan R; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.
Yu L; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, People's Republic of China.
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Źródło :
Environmental technology [Environ Technol] 2021 Jul 18, pp. 1-8. Date of Electronic Publication: 2021 Jul 18.
Publication Model :
Ahead of Print
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Publication: 2008- : Oxford : Taylor & Francis
Original Publication: London : Publications Division, Selper Ltd., 1990-
Contributed Indexing :
Keywords: Carbon nanotubes; boron doping; dual reaction pathways; peroxymonosulfate; phenol
Entry Date(s) :
Date Created: 20210705 Latest Revision: 20210719
Update Code :
20210914
DOI :
10.1080/09593330.2021.1952311
PMID :
34223810
Czasopismo naukowe
A new type of metal-free catalyst was successfully prepared by doping boron (B) in the carbon nanotube. The catalyst had 99.4% removal of phenol in 60 min at pH 7 by activating peroxymonosulfate (PMS). In order to explore the origin of the high catalytic activity, the samples were characterized by Raman and electron paramagnetic resonance (EPR), and the reactive oxygen species (ROS) in the process of catalytic degradation were investigated. The Raman results showed that the defect sites increased after doping, which indicated that the B doping increases the active sites on the surface of the carbon nanotubes. Identification experiments of ROS found that not only hydroxyl radicals (·OH) and sulfate radical ( S O 4 - ∙ ) , but also singlet oxygen ( 1 O 2 ) exist in the system. The presence of multiple free radicals indicated the existence of free radical reaction pathway, and the presence of 1 O 2 confirmed the existence of non-radical reaction pathway. These results indicated that there were dual reaction pathways for the activation of persulfate by B-doped carbon nanotubes, which was the intrinsic nature for the high catalytic activity of the system.

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