High efficient adsorption and storage of iodine on S, N co-doped graphene aerogel

Beibei Liu; Xiaohua Ren; Long Chen; Xiaoxin Ma; Qiong Chen; Qidi Sun; Lin Zhang; Pengchao Si; Lijie Ci

doi:10.1016/j.jhazmat.2019.04.005

High efficient adsorption and storage of iodine on S, N co-doped graphene aerogel

J Hazard Mater. 2019 Jul 5:373:705-715. doi: 10.1016/j.jhazmat.2019.04.005. Epub 2019 Apr 3.

Authors

Beibei Liu¹, Xiaohua Ren¹, Long Chen¹, Xiaoxin Ma¹, Qiong Chen¹, Qidi Sun¹, Lin Zhang¹, Pengchao Si², Lijie Ci³

Affiliations

¹ SDU& Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, 250061, China.
² SDU& Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, 250061, China. Electronic address: [email protected].
³ SDU& Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, 250061, China. Electronic address: [email protected].

PMID: 30959284
DOI: 10.1016/j.jhazmat.2019.04.005

Abstract

High efficient adsorption of radioiodine in nuclear waste has attracted extensive attentions all over the world. In this work, we fabricated sulfur and nitrogen co-doped graphene aerogels (SN-GA) through one-step hydrothermal method, and investigated its iodine adsorption behavior including adsorption kinetics and isotherms in water. Our results reveal that SN-GA exhibits a 3D porous architecture with thiophene-S, oxidized-S, pyridine-N, pyrrole-N and graphite-N co-doped into the sp² carbon frameworks. The adsorption experiment showed SN-GA has a maximum iodine adsorption capacity of 999 mg g^-1 determined by Langmuir isotherm, and the adsorption process could be better described by the pseudo-second-order model.

Keywords: Adsorption and storage; Doped graphene aerogel; Radioiodine; Theoretical simulation.