Nano-sized architectural design of multi-activity graphene oxide (GO) by chemical post-decoration for efficient uranium(VI) extraction

Peipei Yang; Hongsen Zhang; Qi Liu; Jingyuan Liu; Rongrong Chen; Jing Yu; Jindi Hou; Xuefeng Bai; Jun Wang

doi:10.1016/j.jhazmat.2019.05.005

Nano-sized architectural design of multi-activity graphene oxide (GO) by chemical post-decoration for efficient uranium(VI) extraction

J Hazard Mater. 2019 Aug 5:375:320-329. doi: 10.1016/j.jhazmat.2019.05.005. Epub 2019 May 3.

Authors

Peipei Yang¹, Hongsen Zhang¹, Qi Liu¹, Jingyuan Liu¹, Rongrong Chen¹, Jing Yu¹, Jindi Hou², Xuefeng Bai³, Jun Wang⁴

Affiliations

¹ Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, 150001, PR China; College of Material Science and Chemical Engineering, Harbin Engineering University, 150001, PR China.
² College of Science, Harbin Engineering University, 150001, PR China.
³ College of Material Science and Chemical Engineering, Harbin Engineering University, 150001, PR China.
⁴ Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, 150001, PR China; College of Material Science and Chemical Engineering, Harbin Engineering University, 150001, PR China; Institute of Advanced Marine Materials, Harbin Engineering University, 150001, PR China. Electronic address: zhqw1888@sohu.com.

PMID: 31100560
DOI: 10.1016/j.jhazmat.2019.05.005

Abstract

The introduction of organic groups onto graphene oxide (GO) platelets can supply additional active sites for adsorption of uranium(VI) (U(VI)) to improve the adsorption capacity. However, as a result of the existence of stabilizing π-conjugation system, a facile and effective modification method remains a challenge. Therefore, a novel strategy is exploited by nano-sized architectural design of multi-activity GO through post-decoration with amidoxime functionalized diaminomaleonitrile (DM-AO). The post-modification of DM-AO successfully activated the inert sites in GO platelets. Meanwhile, the amidoxime group in DM-AO can improve the adsorption selectivity. Adsorption amount of U(VI) on the as prepared GO-DM-AO reached at 935 mg g^-1, which is increased by 209% increment compared with that of pristine GO at the same concentration. The adsorption efficiency of GO-DM-AO is greatly improved, and the time to reach the adsorption equilibrium is half of that of GO. Excitingly, the excellent removal efficiency could still maintained even after 5 cycles of adsorption-desorption. The outstanding adsorption amount, short adsorption equilibrium time, and excellent removal efficiency can provide a theoretical guidance for further immobilization of U(VI) from seawater.

Keywords: Amidoxime functionalized; Graphene oxide; Nano-sized architectural; Uranium adsorption.