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DFT and Experimental Studies on the Mechanism of Mercury Adsorption on O(2)-/NO-Codoped Porous Carbon
[Image: see text] The utilization of O(2) and NO in flue gas to activate the raw porous carbon with auxiliary plasma contributes to an effective mercury (Hg)-removal strategy. The lack of in-depth knowledge on the Hg adsorption mechanism over the O(2)-/NO-codoped porous carbon severely limits the de...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8154138/ https://www.ncbi.nlm.nih.gov/pubmed/34056386 http://dx.doi.org/10.1021/acsomega.1c01391 |
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author | Liu, Hui Li, Junyuan Xiang, Kaisong He, Shudan Shen, Fenghua |
author_facet | Liu, Hui Li, Junyuan Xiang, Kaisong He, Shudan Shen, Fenghua |
author_sort | Liu, Hui |
collection | PubMed |
description | [Image: see text] The utilization of O(2) and NO in flue gas to activate the raw porous carbon with auxiliary plasma contributes to an effective mercury (Hg)-removal strategy. The lack of in-depth knowledge on the Hg adsorption mechanism over the O(2)-/NO-codoped porous carbon severely limits the development of a more effective Hg removal method and the potential application. Therefore, the generation processes of functional groups on the surface during plasma treatment were investigated and the detailed roles of different groups in Hg adsorption were clarified. The theoretical results suggest that the formation of functional groups is highly exothermic and they preferentially form on a carbon surface, and then affect Hg adsorption. The active groups affect Hg adsorption in a different manner, which depends on their nature. All of these active groups can improve Hg adsorption by enhancing the interaction of Hg with a surface carbon atom. Particularly, the preadsorbed NO(2) and O(3) groups can react directly with Hg by forming HgO. The experimental results confirm that the active groups cocontribute to the high Hg removal efficiency of O(2)-/NO-codoped porous carbon. In addition, the mercury temperature-programmed desorption results suggest that there are two forms of mercury present on O(2)-/NO-codoped porous carbon, including a carbon-bonded Hg atom and HgO. |
format | Online Article Text |
id | pubmed-8154138 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-81541382021-05-27 DFT and Experimental Studies on the Mechanism of Mercury Adsorption on O(2)-/NO-Codoped Porous Carbon Liu, Hui Li, Junyuan Xiang, Kaisong He, Shudan Shen, Fenghua ACS Omega [Image: see text] The utilization of O(2) and NO in flue gas to activate the raw porous carbon with auxiliary plasma contributes to an effective mercury (Hg)-removal strategy. The lack of in-depth knowledge on the Hg adsorption mechanism over the O(2)-/NO-codoped porous carbon severely limits the development of a more effective Hg removal method and the potential application. Therefore, the generation processes of functional groups on the surface during plasma treatment were investigated and the detailed roles of different groups in Hg adsorption were clarified. The theoretical results suggest that the formation of functional groups is highly exothermic and they preferentially form on a carbon surface, and then affect Hg adsorption. The active groups affect Hg adsorption in a different manner, which depends on their nature. All of these active groups can improve Hg adsorption by enhancing the interaction of Hg with a surface carbon atom. Particularly, the preadsorbed NO(2) and O(3) groups can react directly with Hg by forming HgO. The experimental results confirm that the active groups cocontribute to the high Hg removal efficiency of O(2)-/NO-codoped porous carbon. In addition, the mercury temperature-programmed desorption results suggest that there are two forms of mercury present on O(2)-/NO-codoped porous carbon, including a carbon-bonded Hg atom and HgO. American Chemical Society 2021-04-27 /pmc/articles/PMC8154138/ /pubmed/34056386 http://dx.doi.org/10.1021/acsomega.1c01391 Text en © 2021 The Authors. Published by American Chemical Society Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Liu, Hui Li, Junyuan Xiang, Kaisong He, Shudan Shen, Fenghua DFT and Experimental Studies on the Mechanism of Mercury Adsorption on O(2)-/NO-Codoped Porous Carbon |
title | DFT and Experimental Studies on the Mechanism of Mercury
Adsorption on O(2)-/NO-Codoped Porous Carbon |
title_full | DFT and Experimental Studies on the Mechanism of Mercury
Adsorption on O(2)-/NO-Codoped Porous Carbon |
title_fullStr | DFT and Experimental Studies on the Mechanism of Mercury
Adsorption on O(2)-/NO-Codoped Porous Carbon |
title_full_unstemmed | DFT and Experimental Studies on the Mechanism of Mercury
Adsorption on O(2)-/NO-Codoped Porous Carbon |
title_short | DFT and Experimental Studies on the Mechanism of Mercury
Adsorption on O(2)-/NO-Codoped Porous Carbon |
title_sort | dft and experimental studies on the mechanism of mercury
adsorption on o(2)-/no-codoped porous carbon |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8154138/ https://www.ncbi.nlm.nih.gov/pubmed/34056386 http://dx.doi.org/10.1021/acsomega.1c01391 |
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