▎ 摘　　要

Graphene sponges have attracted extensive interest as adsorbents. However, the hydrophobic nature of graphene hinders the submergence of graphene sponge into the water solution. In the present study, we developed a graphene-melamine-sponge (GMS) that can readily submerge into water solution with the help of a superhydrophilic melamine skeleton and investigated its adsorption behaviors for methylene blue (MB) and orange G (OG). The obtained GMS efficiently adsorbed methylene blue with competitive capacity. Isotherm analysis indicated that the adsorption corresponded to the Langmuir isotherm model in a monolayer manner. The maximum adsorption capacities for MB and OG obtained from the Langmuir isotherm equation are 286.5 mg g(-1) and 80.51 mg g(-1), respectively. Kinetic studies showed that the adsorption followed a pseudo-second-order kinetics model. The as-prepared GMS could be easily regenerated and maintained 95% adsorption capacity after 10 cycles.