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Chemcial Industry and Engineering 2024, Vol. 41 Issue (4) :97-108    DOI: 10.13353/j.issn.1004.9533.20220314
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Adsorption properties of UiO-66-NH2 functionalized cotton fiber prepared by cross-linking for Reactive Blue 4
DUAN Xingyu, QU Hongmei, DONG Min, ZHANG Jiacai, SUN Yiping, LI Xiaolong
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract A novel amino-rich metal-organic frameworks (MOFs) functionalized cotton fiber-based composite (UCF) was prepared conveniently by cross-linking cotton fiber (CF) and UiO-66-NH2 with epichlorohydrin (ECH) as the cross-linking agent, and was applied to the high-capacity adsorption of Reactive 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 mechanism 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 fiber; 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 composites, and shows the application potential of this composite in the field of dye wastewater treatment.
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Articles by authors
DUAN Xingyu
QU Hongmei
DONG Min
ZHANG Jiacai
SUN Yiping
LI Xiaolong
Keywordsdye wastewater   adsorption   cotton fiber   mental-organic frameworks   chemical modification     
Received 2022-04-07;
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DUAN Xingyu, QU Hongmei, DONG Min, ZHANG Jiacai, SUN Yiping, LI Xiaolong.Adsorption properties of UiO-66-NH2 functionalized cotton fiber prepared by cross-linking for Reactive Blue 4[J]  Chemcial Industry and Engineering, 2024,V41(4): 97-108
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