Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons
A variety of dimensional-structured nanocarbons were applied for the first time as metal-free catalysts to activate persulfate (PS) for catalytic oxidation of phenolics and dyes as well as their degradation intermediates. Singlewalled carbon nanotubes (SWCNTs), reduced graphene oxide (rGO), and meso...
| 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/20.500.11937/30308 |
| _version_ | 1848753051670675456 |
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| author | Duan, X. Sun, Hongqi Kang, J. Wang, Yuxian Indrawirawan, S. Wang, Shaobin |
| author_facet | Duan, X. Sun, Hongqi Kang, J. Wang, Yuxian Indrawirawan, S. Wang, Shaobin |
| author_sort | Duan, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A variety of dimensional-structured nanocarbons were applied for the first time as metal-free catalysts to activate persulfate (PS) for catalytic oxidation of phenolics and dyes as well as their degradation intermediates. Singlewalled carbon nanotubes (SWCNTs), reduced graphene oxide (rGO), and mesoporous carbon (CMK-8) demonstrated superior catalytic activities for heterogeneous PS activation, whereas fullerene (C60), nanodiamonds, and graphitic carbon nitride (g-C3N4) presented low efficiencies. Moreover, the carbocatalysts presented even better catalytic performances than activated carbon and metal oxides, such as Fe3O4, CuO, Co3O4, and MnO2. The activity of prepared rGO-900 was further competing to the most efficient electron donor ofzerovalent iron (ZVI). Both characterization and oxidation results suggested that the catalytic performances of the nanocarbons are determined by the intrinsic atom arrangements of carbon hybridization, pore structure, defective sites, and functional groups (especially the carbonyl groups). Electron paramagnetic resonance (EPR) spectra revealed that carbocatalysts might act as an excellent electron bridge in activation of PS to oxidize adsorbed water directly to generate hydroxyl radicals, distinct from homogeneous and metal-based catalytic activation. This study discovers several efficient nanocarbons for heterogeneous PS activation, and it presents new insights into the catalytic activation processes, providing a fascinating strategy to develop metal-free catalysts for green remediation. |
| first_indexed | 2025-11-14T08:18:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-30308 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:18:22Z |
| publishDate | 2015 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-303082017-09-13T15:31:39Z Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons Duan, X. Sun, Hongqi Kang, J. Wang, Yuxian Indrawirawan, S. Wang, Shaobin A variety of dimensional-structured nanocarbons were applied for the first time as metal-free catalysts to activate persulfate (PS) for catalytic oxidation of phenolics and dyes as well as their degradation intermediates. Singlewalled carbon nanotubes (SWCNTs), reduced graphene oxide (rGO), and mesoporous carbon (CMK-8) demonstrated superior catalytic activities for heterogeneous PS activation, whereas fullerene (C60), nanodiamonds, and graphitic carbon nitride (g-C3N4) presented low efficiencies. Moreover, the carbocatalysts presented even better catalytic performances than activated carbon and metal oxides, such as Fe3O4, CuO, Co3O4, and MnO2. The activity of prepared rGO-900 was further competing to the most efficient electron donor ofzerovalent iron (ZVI). Both characterization and oxidation results suggested that the catalytic performances of the nanocarbons are determined by the intrinsic atom arrangements of carbon hybridization, pore structure, defective sites, and functional groups (especially the carbonyl groups). Electron paramagnetic resonance (EPR) spectra revealed that carbocatalysts might act as an excellent electron bridge in activation of PS to oxidize adsorbed water directly to generate hydroxyl radicals, distinct from homogeneous and metal-based catalytic activation. This study discovers several efficient nanocarbons for heterogeneous PS activation, and it presents new insights into the catalytic activation processes, providing a fascinating strategy to develop metal-free catalysts for green remediation. 2015 Journal Article http://hdl.handle.net/20.500.11937/30308 10.1021/acscatal.5b00774 http://purl.org/au-research/grants/arc/DP130101319 American Chemical Society restricted |
| spellingShingle | Duan, X. Sun, Hongqi Kang, J. Wang, Yuxian Indrawirawan, S. Wang, Shaobin Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title | Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title_full | Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title_fullStr | Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title_full_unstemmed | Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title_short | Insights into Heterogeneous Catalysis of Persulfate Activation on Dimensional-Structured Nanocarbons |
| title_sort | insights into heterogeneous catalysis of persulfate activation on dimensional-structured nanocarbons |
| url | http://purl.org/au-research/grants/arc/DP130101319 http://hdl.handle.net/20.500.11937/30308 |