新型炭材料2021，Vol.36Issue(6)：1138-1148,11.DOI:10.1016/S1872-5805(21)60055-0
杂原子掺杂的羧酸功能化炭材料的制备及其吸附U(VI)性能
Preparation of a N, S, P co-doped and oxidized porous carbon for the efficient adsorption of uranium(VI)
摘要
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 ℃, followed by KOH activation and HNO3 oxidation. The carbon was used as an adsorbent for urani-um(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 ori-ginal 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.关键词
聚磷腈/羧基/铀/吸附/杂原子Key words
Polyphosphazene/Carboxyl/Uranium/Adsorption/Heteroatoms分类
化学化工引用本文复制引用
刘妍,刘晓鹏,戴荧,王云,袁定重,刘晋彪,Chew Jia-wei..杂原子掺杂的羧酸功能化炭材料的制备及其吸附U(VI)性能[J].新型炭材料,2021,36(6):1138-1148,11.基金项目
国家自然科学基金项目(22166001,21966005,22066002),江西省自然科学基金项目(20202BABL2030012,20192 BAB202007,20192ACB21001),东华理工大学核资源与环境国家重点实验室开放基金(NRE1926),省级大学生创新创业训练计划项目(S202110405019).We appreciate the financial support from the Na-tional Natural Science Foundation of China(No.22166001,21966005,22066002),the Jiangxi Provincial Natural Science Foundation(No.20202 BABL203001,20192BAB202007,20192ACB21001),the Opening fund project of State Key Laboratory of Nuclear Resources and Environment,East China Uni-versity of Technology(NRE1926),Provincial Col-lege Students'Innovation and Entrepreneurship Train-ing Program(S202110405019). （22166001,21966005,22066002）
