Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration
The employment of electrochemical technology in membrane filtration promises high separation efficiency with minimal membrane fouling. Herein, we fabricated single cobalt atom and nitrogen atom codoped graphene (NG-Co) as a conductive membrane, and showed that it achieved 99.5% rejection at a small...
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sg-ntu-dr.10356-1555202022-03-07T06:51:11Z Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration Pan, Meilan Wang, Jiong Gao, Guandao Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Bioengineering Oxygen Reduction Reaction Waste-Water-Treatment The employment of electrochemical technology in membrane filtration promises high separation efficiency with minimal membrane fouling. Herein, we fabricated single cobalt atom and nitrogen atom codoped graphene (NG-Co) as a conductive membrane, and showed that it achieved 99.5% rejection at a small voltage of 2.5 V and exhibited excellent reusability. The turnover frequency of the single Co site was about 13.5 times larger than that of traditional Co-based nanocatalysts, because the single Co site served as the key electrochemical active site to degrade the organic pollutants, while the nitrogen-doped groups of graphene served as efficient binding sites for the immobilization of the single Co site to improve the intrinsic catalytic activity of the Co sites. This study has important implications for the design of graphene-based conductive membranes in the electrochemical remediation of wastewater. Economic Development Board (EDB) This work was supported by the Singapore GSK (GlaxoSmithKline) – EDB (Economic Development Board) Trust Fund. 2022-03-07T06:51:11Z 2022-03-07T06:51:11Z 2020 Journal Article Pan, M., Wang, J., Gao, G. & Chew, J. W. (2020). Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration. Journal of Membrane Science, 602, 117966-. https://dx.doi.org/10.1016/j.memsci.2020.117966 0376-7388 https://hdl.handle.net/10356/155520 10.1016/j.memsci.2020.117966 2-s2.0-85080051538 602 117966 en Journal of Membrane Science © 2020 Elsevier B.V. All rights reserved |
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Engineering::Bioengineering Oxygen Reduction Reaction Waste-Water-Treatment Pan, Meilan Wang, Jiong Gao, Guandao Chew, Jia Wei Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
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The employment of electrochemical technology in membrane filtration promises high separation efficiency with minimal membrane fouling. Herein, we fabricated single cobalt atom and nitrogen atom codoped graphene (NG-Co) as a conductive membrane, and showed that it achieved 99.5% rejection at a small voltage of 2.5 V and exhibited excellent reusability. The turnover frequency of the single Co site was about 13.5 times larger than that of traditional Co-based nanocatalysts, because the single Co site served as the key electrochemical active site to degrade the organic pollutants, while the nitrogen-doped groups of graphene served as efficient binding sites for the immobilization of the single Co site to improve the intrinsic catalytic activity of the Co sites. This study has important implications for the design of graphene-based conductive membranes in the electrochemical remediation of wastewater. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Pan, Meilan Wang, Jiong Gao, Guandao Chew, Jia Wei |
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Article |
author |
Pan, Meilan Wang, Jiong Gao, Guandao Chew, Jia Wei |
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Pan, Meilan |
title |
Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
title_short |
Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
title_full |
Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
title_fullStr |
Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
title_full_unstemmed |
Incorporation of single cobalt active sites onto N-doped graphene for superior conductive membranes in electrochemical filtration |
title_sort |
incorporation of single cobalt active sites onto n-doped graphene for superior conductive membranes in electrochemical filtration |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/155520 |
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1726885521207066624 |