Abstract
A novel quaternized-chitosan-modified reduced graphene oxide (HACC-RGO) combined the adsorption advantages of RGO and 2-Hydroxypropyltrimethyl ammonium chloride chitosan (HACC). The adsorption property of HACC-RGO sheets for methyl orange (MO) was demonstrated and compared with RGO and HACC. The removal ratios of HACC-RGO sheets reached 92.6% for MO after a 24 h adsorption. The adsorption kinetics, isotherms and thermodynamics were investigated to indicate that the kinetics and equilibrium adsorptions were well-described by pseudo-second-order kinetic and Freundlich isotherm model, respectively. The thermodynamic parameters suggested that the adsorption process was spontaneous and endothermic in nature. Moreover, monodisperse HACC-RGO/CS beads were fabricated by the microfluidic method. The adsorption and desorption of HACC-RGO/CS beads for MO were studied. After three adsorption-desorption cycles, the adsorption capacity remained above 55% and the desorption capacity was not below 70%. The HACC-RGO/CS beads can be reused and have great potential applications in removing organic dyes from polluted water.
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Funded by the National Natural Science Foundation of China (Nos. 50803048 and 50703030)
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Guo, C., Liu, M., Xia, Y. et al. Adsorption of Quaternized-chitosan-modified Reduced Graphene Oxide. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 967–973 (2018). https://doi.org/10.1007/s11595-018-1920-y
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DOI: https://doi.org/10.1007/s11595-018-1920-y