▎ 摘　　要

In this study, we succeed to synthesis GS@Fe sponge from graphene oxide and FeCl3 through an in-situ reduction of Fe3+ and GO. The structures, properties, and applications of the obtained hybrid were characterized by using XRD, SEM, and measurement of contact angles, UV-Vis spectroscopy, and FTIR analysis. The GS@Fe and bare graphene sponges are also evaluated for decolorization of methylene blue solution. Analysis the obtained experimental data showed the adsorption of methylene blue on the prepared GS@Fe sponge was more quickly than bare graphene sponge. The maximum removal percentage of GS@Fe and bare graphene sponge were about 99.8% and 9.8%, respectively, after ten days, without exposing the external UV light. The FT-IR analysis indicated some linkages of adsorbed molecules on GS@Fe were broken. It can be suggested GS@Fe degraded the adsorbed methylene blue molecules under sunlight irradiation and adsorption is not only due to the pi-pi interaction between graphene sheets, but also electron donner properties of Fe causes degradation of dyes. Finally, the ability of synthesized GS@Fe sponge to degrade chlorinated organic solvent was also illustrated by the turbidity variation studies.