Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium
© 2018 Elsevier B.V. N-doped carbon nanotubes encapsulating Ni 0 nanoparticles (Ni@N-C) were fabricated via thermal reduction of dicyandiamide and NiCl 2 ·6H 2 O, and used to remove Cr VI in polluted water. The resultant products present an excellent catalytic activity for Cr VI reduction using form...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV North-Holland
2018
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| Online Access: | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/65503 |
| _version_ | 1848761144824561664 |
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| author | Yao, Y. Zhang, J. Chen, H. Yu, M. Gao, M. Hu, Y. Wang, Shaobin |
| author_facet | Yao, Y. Zhang, J. Chen, H. Yu, M. Gao, M. Hu, Y. Wang, Shaobin |
| author_sort | Yao, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018 Elsevier B.V. N-doped carbon nanotubes encapsulating Ni 0 nanoparticles (Ni@N-C) were fabricated via thermal reduction of dicyandiamide and NiCl 2 ·6H 2 O, and used to remove Cr VI in polluted water. The resultant products present an excellent catalytic activity for Cr VI reduction using formic acid under relatively mild conditions. The Cr VI reduction efficiency of Ni@N-C was significantly affected by the preparation conditions including the mass of nickel salt and synthesis temperatures. The impacts of several reaction parameters, such as initial concentrations of Cr VI and formic acid, solution pH and temperatures, as well as inorganic anions in solution on Cr VI reduction efficiency were also evaluated in view of scalable industrial applications. Owing to the synergistic effects amongst tubes-coated Ni 0 , doped nitrogen, oxygen containing groups, and the configuration of carbon nanotubes, Ni@N-C catalysts exhibit excellent catalytic activity and recyclable capability for Cr VI reduction. Carbon shell can efficiently protect inner Ni 0 core and N species from corrosion and subsequent leaching, while Ni 0 endows the Ni@N-C catalysts with ferromagnetism, so that the composites can be easily separated via a permanent magnet. This study opens up an avenue for design of N-doped carbon nanotubes encapsulating Ni 0 nanoparticles with high Cr VI removal efficiency and magnetic recyclability as low-cost catalysts for industrial applications. |
| first_indexed | 2025-11-14T10:27:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-65503 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:27:00Z |
| publishDate | 2018 |
| publisher | Elsevier BV North-Holland |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-655032023-08-02T06:39:11Z Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium Yao, Y. Zhang, J. Chen, H. Yu, M. Gao, M. Hu, Y. Wang, Shaobin © 2018 Elsevier B.V. N-doped carbon nanotubes encapsulating Ni 0 nanoparticles (Ni@N-C) were fabricated via thermal reduction of dicyandiamide and NiCl 2 ·6H 2 O, and used to remove Cr VI in polluted water. The resultant products present an excellent catalytic activity for Cr VI reduction using formic acid under relatively mild conditions. The Cr VI reduction efficiency of Ni@N-C was significantly affected by the preparation conditions including the mass of nickel salt and synthesis temperatures. The impacts of several reaction parameters, such as initial concentrations of Cr VI and formic acid, solution pH and temperatures, as well as inorganic anions in solution on Cr VI reduction efficiency were also evaluated in view of scalable industrial applications. Owing to the synergistic effects amongst tubes-coated Ni 0 , doped nitrogen, oxygen containing groups, and the configuration of carbon nanotubes, Ni@N-C catalysts exhibit excellent catalytic activity and recyclable capability for Cr VI reduction. Carbon shell can efficiently protect inner Ni 0 core and N species from corrosion and subsequent leaching, while Ni 0 endows the Ni@N-C catalysts with ferromagnetism, so that the composites can be easily separated via a permanent magnet. This study opens up an avenue for design of N-doped carbon nanotubes encapsulating Ni 0 nanoparticles with high Cr VI removal efficiency and magnetic recyclability as low-cost catalysts for industrial applications. 2018 Journal Article http://hdl.handle.net/20.500.11937/65503 10.1016/j.apsusc.2018.01.123 http://purl.org/au-research/grants/arc/DP150103026 Elsevier BV North-Holland restricted |
| spellingShingle | Yao, Y. Zhang, J. Chen, H. Yu, M. Gao, M. Hu, Y. Wang, Shaobin Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title | Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title_full | Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title_fullStr | Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title_full_unstemmed | Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title_short | Ni0encapsulated in N-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| title_sort | ni0encapsulated in n-doped carbon nanotubes for catalytic reduction of highly toxic hexavalent chromium |
| url | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/65503 |