Abstract
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.
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The datasets generated during the current study are available from the corresponding author on reasonable request.
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The authors gratefully acknowledge the National Natural Science Foundation of China (11872001), Anhui Science Fund for Distinguished Young Scholars (1808085J30) and the Doctoral Research Funds of Anhui University of Science and Technology (ZY016) for financial support.
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Lin, X., Zhang, J., Feng, H. et al. The influence of graphene oxide content on adsorption of PVA/SA composite gel spheres. Colloid Polym Sci 301, 93–105 (2023). https://doi.org/10.1007/s00396-022-05046-1
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DOI: https://doi.org/10.1007/s00396-022-05046-1