▎ 摘　　要

Sodium alginate gels modified by polyvinyl alcohol and graphene oxide (GO/PVA/SA) were prepared, and were characterized by Fourier-transform infrared spectroscopy, Raman spectrum, and X-ray diffraction analysis. The morphologies of the gels were observed with scanning electron microscope. It was found that the adsorption of polyvinyl alcohol/sodium alginate gels (PVA/SA) could be modified due to the incorporation of graphene oxide. The adsorption data showed that the adsorption capacity of GO/PVA/SA gel spheres was higher than that of PVA/SA gel spheres and was optimal when the graphene oxide content reached 4 wt% in composite gel spheres. The adsorption kinetics had a better agreement with the pseudo-second-order equation than the pseudo-first-order equation, and Langmuir model was more suitable for explaining the current adsorption process of gels for dye. The desorption behavior of dye showed that the gel spheres could keep a certain adsorption capacity after 4 cycles and the desorption effects of gel with the 4 wt% graphene oxide reached the optimal level.