A novel amino-rich metal-organic frameworks(MOFs)functionalized cotton fiber-based com-posite(UCF)was prepared conveniently by cross-linking cotton fiber(CF)and UiO-66-NH2 with epi-chlorohydrin(ECH)as the cross-linking agent,and was applied to the high-capacity adsorption of Reac-tive Blue 4(RB4)in aqueous solution.Compared with the method of growing MOFs on substrates via hydrothermal synthesis,cross-linking is faster and easier.Scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier-transform infrared spectroscopy(FT-IR)and thermogravimetric analysis(TGA)demonstrated the successful synthesis of UCF.In addition,the effects of adsorbent dosage,pH,temperature,dye concentration and contact time on the adsorption performance were further investigated,the adsorption isotherm,kinetic and thermodynamic properties were explored,and the adsorption mecha-nism was analyzed and summarized.The results showed that the maximum adsorption capacity of UCF was 539.2 mg·g-1 under the optimum conditions,which was 785.39％higher than that of raw cotton fi-ber;The adsorption process followed Freundlich isotherm model and pseudo-second-order kinetic model;The adsorption process was spontaneous and exothermic;Electrostatic interaction was the main driving force of the process.This study provides a simpler strategy for the preparation of biomass-MOFs compos-ites,and shows the application potential of this composite in the field of dye wastewater treatment.
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