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

doi:10.1016/S1872-5805(21)60055-0

Volume 36 Issue 6

Dec. 2021

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Article Navigation > New Carbon Mater. > 2021 > 36(6): 1138-1148

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). New Carbon Mater., 2021, 36(6): 1138-1148. doi: 10.1016/S1872-5805(21)60055-0

Citation:

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). New Carbon Mater., 2021, 36(6): 1138-1148. doi: 10.1016/S1872-5805(21)60055-0

Citation:

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). New Carbon Mater., 2021, 36(6): 1138-1148. doi: 10.1016/S1872-5805(21)60055-0

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

doi: 10.1016/S1872-5805(21)60055-0

1.
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
2.
Department of Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China
3.
School of Chemical and Biomedical Engineering, Nanyang Technological University 637459, Singapore
4.
Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University 639798, Singapore

Funds: 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, 20192ACB21001), the Opening fund project of State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (NRE1926), Provincial College Students' Innovation and Entrepreneurship Training Program (S202110405019)

More Information

Corresponding author: LIU Yan, Associate Professor. E-mail: fzliuyan1986@163.com; CHEW Jia-wei, Associate Professor. E-mail: JChew@ntu.edu.sg
Received Date: 2020-02-26
Rev Recd Date: 2020-12-10

Available Online: 2021-03-25

Publish Date: 2021-12-01

Abstract

Abstract

A N, S, P co-doped and oxidized porous carbon was prepared by the carbonization of poly (cyclotriphosphazene-co-4,4’-sulfonyldiphenol) at 750 °C, 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.
- Polyphosphazene,
- Carboxyl,
- Uranium,
- Adsorption,
- Heteroatoms

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References(36)

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