N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation
Metal-free materials have been demonstrated to be promising alternatives to conventional metal-based catalysts. Catalysis on nanocarbons comparable to that of cobalt- or manganese-based catalysts in peroxymonosulfate (PMS) activation has been achieved, yet the catalyst stability has to be addressed...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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American Chemical Society
2015
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| Online Access: | http://purl.org/au-research/grants/arc/DP130101319 http://hdl.handle.net/20.500.11937/8346 |
| _version_ | 1848745631074484224 |
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| author | Duan, X. Sun, Hongqi Wang, Yuxian Kang, J. Wang, Shaobin |
| author_facet | Duan, X. Sun, Hongqi Wang, Yuxian Kang, J. Wang, Shaobin |
| author_sort | Duan, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Metal-free materials have been demonstrated to be promising alternatives to conventional metal-based catalysts. Catalysis on nanocarbons comparable to that of cobalt- or manganese-based catalysts in peroxymonosulfate (PMS) activation has been achieved, yet the catalyst stability has to be addressed and the mechanism also needs to be elucidated. In this study, N-doped carbon nanotubes (NoCNTs) were employed as metal-free catalysts for phenol catalytic oxidation with sulfate radicals and, more importantly, a detailed mechanism of PMS activation and the roles of nitrogen heteroatoms were comprehensively investigated. For the first time, a nonradical pathway accompanied by radical generation (•OH and SO4•–) in phenol oxidation with PMS was discovered upon nitrogen heteroatom doping. The NoCNTs presented excellent stability due to the emerging nonradical processes. The findings can be used for the design of efficient and robust metal-free catalysts with both superior catalytic performance and high stability for various heterogeneous catalytic processes. |
| first_indexed | 2025-11-14T06:20:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-8346 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:20:25Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-83462022-10-06T06:32:24Z N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation Duan, X. Sun, Hongqi Wang, Yuxian Kang, J. Wang, Shaobin Metal-free materials have been demonstrated to be promising alternatives to conventional metal-based catalysts. Catalysis on nanocarbons comparable to that of cobalt- or manganese-based catalysts in peroxymonosulfate (PMS) activation has been achieved, yet the catalyst stability has to be addressed and the mechanism also needs to be elucidated. In this study, N-doped carbon nanotubes (NoCNTs) were employed as metal-free catalysts for phenol catalytic oxidation with sulfate radicals and, more importantly, a detailed mechanism of PMS activation and the roles of nitrogen heteroatoms were comprehensively investigated. For the first time, a nonradical pathway accompanied by radical generation (•OH and SO4•–) in phenol oxidation with PMS was discovered upon nitrogen heteroatom doping. The NoCNTs presented excellent stability due to the emerging nonradical processes. The findings can be used for the design of efficient and robust metal-free catalysts with both superior catalytic performance and high stability for various heterogeneous catalytic processes. 2015 Journal Article http://hdl.handle.net/20.500.11937/8346 10.1021/cs5017613 http://purl.org/au-research/grants/arc/DP130101319 American Chemical Society restricted |
| spellingShingle | Duan, X. Sun, Hongqi Wang, Yuxian Kang, J. Wang, Shaobin N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title | N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title_full | N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title_fullStr | N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title_full_unstemmed | N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title_short | N-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| title_sort | n-doping-induced nonradical reaction on single-walled carbon nanotubes for catalytic phenol oxidation |
| url | http://purl.org/au-research/grants/arc/DP130101319 http://hdl.handle.net/20.500.11937/8346 |