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Defective, oxygen-functionalized multi-walled carbon nanotubes as an efficient peroxymonosulfate activator for degradation of organic pollutants

Title
Defective, oxygen-functionalized multi-walled carbon nanotubes as an efficient peroxymonosulfate activator for degradation of organic pollutants
Author
Adil, Sawaira
Keywords
Metal-free catalysis; Defect engineering; Multi-walled carbon nanotubes; Peroxymonosulfate; Carbonyl group
Issue Date
2020-04
Publisher
ELSEVIER
Citation
JOURNAL OF HAZARDOUS MATERIALS, v. 396, article no. 122757
Abstract
Herein, the defects and surface oxygen functionalities of multi-walled carbon nanotubes (MWCNTs) derived from a solid state reaction are demonstrated to be effective in the activation of peroxymonosulfate (PMS) for organic pollutant degradation. The catalytic activity of defective, oxygen-functionalized CNTs (dCNTs) is much better than bare CNTs, which stems from many active sites on the CNT surface, including structural defects and carbonyl functional groups, and excellent electrical conductivity. Furthermore, the effect of several operational factors and water conditions on the degradation rate of the targeted pollutant and material stability are comprehensively evaluated for the practical application of the dCNT/PMS-coupled process. The underlying catalytic mechanism in dCNTs is expected to take place via nonradical pathway and radical-induced oxidation where surface-bound radicals play a more dominant role than free radicals. The defect and oxygen functional group tuning strategy provides an effective methodology for the development of advanced carbon catalysts in Fenton-like reactions
URI
https://www.sciencedirect.com/science/article/pii/S0304389420307469?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/169674
ISSN
0304-3894; 1873-3336
DOI
10.1016/j.jhazmat.2020.122757
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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