Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)

A N, S, P co-doped and oxidized porous carbon was prepared by the carbonization of poly (cyclotriphosphazene-co-4,4'-sulfonyldiphenol) at 750 ℃, followed by KOH activation and HNO3 oxidation. The carbon was used as an adsorbent for uranium(VI) in aqueous solutions. TEM, SEM, XPS and FTIR were u...

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Main Authors: Liu, Yan, Liu, Xiao-peng, Dai, Ying, Wang, Yun, Yuan, Ding-zhong, Liu, Jin-biao, Chew, Jia Wei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/170501
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1705012023-09-15T07:41:45Z Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI) Liu, Yan Liu, Xiao-peng Dai, Ying Wang, Yun Yuan, Ding-zhong Liu, Jin-biao Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Engineering::Chemical engineering Polyphosphazene Carboxyl A N, S, P co-doped and oxidized porous carbon was prepared by the carbonization of poly (cyclotriphosphazene-co-4,4'-sulfonyldiphenol) at 750 ℃, followed by KOH activation and HNO3 oxidation. The carbon was used as an adsorbent for uranium(VI) in aqueous solutions. TEM, SEM, XPS and FTIR were used to characterize its microstructure before and after adsorption. Results indicate that there is an optimum pH value of 6 for U(VI) adsorption. The adsorption kinetics and isotherms were fitted well by the pseudo-second-order and the Langmuir models, respectively. The maximum adsorption capacity determined by the Langmuir model at 298 K and a pH value of 6 was 402.9 mg g−1. The carbon has excellent reusability and retains 70% of the capacity of the original value after five adsorption-desorption cycles. The high U(VI) adsorption capacity is mainly attributed to the carboxyl, and P and S groups by the formation of the UO22+(COO−)2 complex, and U-O-P and U-O-S bonds. We appreciate the financial support from the National Natural Science Foundation of China (No.22166001, 21966005, 22066002), the Jiangxi Provincial Natural Science Foundation (No.20202BABL203001, 20192BAB202007, 20192ACB210 01), the Opening fund project of State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (NRE1926), PrYovincial College Students' Innovation and Entrepreneurship Training Program (S20211 0405019). 2023-09-15T07:41:45Z 2023-09-15T07:41:45Z 2021 Journal Article Liu, Y., Liu, X., Dai, Y., Wang, Y., Yuan, D., Liu, J. & Chew, J. W. (2021). Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI). New Carbon Materials, 36(6), 1138-1148. https://dx.doi.org/10.1016/S1872-5805(21)60055-0 1872-5805 https://hdl.handle.net/10356/170501 10.1016/S1872-5805(21)60055-0 2-s2.0-85121349185 6 36 1138 1148 en New Carbon Materials © 2021 Institute of Coal Chemistry, Chinese Academy of Sciences. Published by Elsevier Limited. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Chemical engineering
Polyphosphazene
Carboxyl
spellingShingle Engineering::Chemical engineering
Polyphosphazene
Carboxyl
Liu, Yan
Liu, Xiao-peng
Dai, Ying
Wang, Yun
Yuan, Ding-zhong
Liu, Jin-biao
Chew, Jia Wei
Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
description A N, S, P co-doped and oxidized porous carbon was prepared by the carbonization of poly (cyclotriphosphazene-co-4,4'-sulfonyldiphenol) at 750 ℃, followed by KOH activation and HNO3 oxidation. The carbon was used as an adsorbent for uranium(VI) in aqueous solutions. TEM, SEM, XPS and FTIR were used to characterize its microstructure before and after adsorption. Results indicate that there is an optimum pH value of 6 for U(VI) adsorption. The adsorption kinetics and isotherms were fitted well by the pseudo-second-order and the Langmuir models, respectively. The maximum adsorption capacity determined by the Langmuir model at 298 K and a pH value of 6 was 402.9 mg g−1. The carbon has excellent reusability and retains 70% of the capacity of the original value after five adsorption-desorption cycles. The high U(VI) adsorption capacity is mainly attributed to the carboxyl, and P and S groups by the formation of the UO22+(COO−)2 complex, and U-O-P and U-O-S bonds.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Liu, Yan
Liu, Xiao-peng
Dai, Ying
Wang, Yun
Yuan, Ding-zhong
Liu, Jin-biao
Chew, Jia Wei
format Article
author Liu, Yan
Liu, Xiao-peng
Dai, Ying
Wang, Yun
Yuan, Ding-zhong
Liu, Jin-biao
Chew, Jia Wei
author_sort Liu, Yan
title Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
title_short Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
title_full Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
title_fullStr Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
title_full_unstemmed Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
title_sort preparation of a n, s, p co-doped and oxidized porous carbon for the efficient adsorption of uranium(vi)
publishDate 2023
url https://hdl.handle.net/10356/170501
_version_ 1779156580350033920