High efficient adsorption and storage of iodine on S, N co-doped graphene aerogel
JOURNAL OF HAZARDOUS MATERIALS(2019)
摘要
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 sp(2) 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.
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关键词
Doped graphene aerogel,Radioiodine,Adsorption and storage,Theoretical simulation
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