title: Preparation of Graphene Oxide-Based Hydrogels as Efficient Dye Adsorbents for Wastewater Treatment.
abstract: Graphene oxide (GO) sheets exhibit superior adsorption capacity for removing organic dye pollutants from an aqueous environment. In this paper, the facile preparation of GO/polyethylenimine (PEI) hydrogels as efficient dye adsorbents has been reported. The GO/PEI hydrogels were achieved through both hydrogen bonding and electrostatic interactions between amine-rich PEI and GO sheets. For both methylene blue (MB) and rhodamine B (RhB), the as-prepared hydrogels exhibit removal rates within about 4 h in accordance with the pseudo-second-order model. The dye adsorption capacity of the hydrogel is mainly attributed to the GO sheets, whereas the PEI was incorporated to facilitate the gelation process of GO sheets. More importantly, the dye-adsorbed hydrogels can be conveniently separated from an aqueous environment, suggesting potential large-scale applications of the GO-based hydrogels for organic dye removal and wastewater treatment.
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, People's Republic of China, 614683815@qq.com.
authors.forename: Haiying
authors.initials: H
authors.lastname: Guo
authors.forename: Tifeng
authors.initials: T
authors.lastname: Jiao
authors.forename: Qingrui
authors.initials: Q
authors.lastname: Zhang
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Guo
authors.forename: Qiuming
authors.initials: Q
authors.lastname: Peng
authors.forename: Xuehai
authors.initials: X
authors.lastname: Yan