▎ 摘　　要

A graphene oxide hydrogel (GOH) is fabricated via suspending the graphene oxide (GO) in water without any additional processing steps. At the hydrogel/air interface, a well-defined hydrogel membrane forms once the solvent is removed by vacuum drying. The microstructure of the resulting GOH film can be tailored by different dehydration approaches, as well as by varying the GO concentration in the hydrogel. This GOH exhibited pH-responsiveness and good mechanical properties. Meanwhile, the GOH presented good adsorption capacity to the organic dye rhodamine B and anionic chromate Cr2O72-. This GOH may find great potential in many fields, such as wastewater treatment, biodetection, etc.