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

被引：0

作者：

Liu, Yan ^{[1
]}

Liu, Xiao-Peng ^{[1
]}

Dai, Ying ^{[1
]}

Wang, Yun ^{[1
]}

Yuan, Ding-Zhong ^{[1
]}

Liu, Jin-Biao ^{[2
]}

Chew, Jia-Wei ^{[3
,4
]}

机构：

[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, Singapore,637459, Singapore

[4] Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore,639798, Singapore

来源：

Xinxing Tan Cailiao/New Carbon Materials | 2021年 / 36卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Carbon - Carbonization - pH - Porous materials - Potassium hydroxide - Reusability - Uranium dioxide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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. © 2021, Science Press. All right reserved.

引用

页码：1138 / 1148