摘要：To overcome the limitations of large-scale applications for MOFs in the powder form, herein,we proposed a strategy of in sit growth ZIF-8 onto polyaniline (PANI) modified coconut hydrogel (CCH).Firstly, PANI played the role of metal chelated layers, which were coated on CCH by in-situ polymerization.Then, ZIF-8 nanocrystals were in-situ growth on the surface of the PANI coated CCH to synthesise thecomposite adsorbent ZIF-8/PANI/CCH. Finally, after vacuum freeze-dried, a white and well structured ZIF-8/PANI/CCA(ZIF-8/polyaniline/coconut aerogel) was obtained. The loading mass ratios of ZIF-8 on CCAand PANI/CCA were 11.3% and 37.5%, respectively, which indicates that PANI as interface layers caneffectively promote the in-situ growth of ZIF-8. The obtained composite adsorbent (ZIF-8/PANI/CCA) wasapplied for the adsorption of tetracyeline (TC)，and the removal efficiency reaches over 91 .6%. Thisstrategy may provide an effective and versatile pathway to increase MOF loading mass on naturalpolysaccharide aerogel and sequentially branch out their applications in pollutant treatment fields.
其他摘要：To overcome the limitations of large-scale applications for MOFs in the powder form, herein, we proposed a strategy of in-situ growth ZIF-8 onto polyaniline (PANI) modified coconut hydrogel (CCH). Firstly, PANI played the role of metal chelated layers, which were coated on CCH by in-situ polymerization. Then, ZIF-8 nanocrystals were in-situ growth on the surface of the PANI coated CCH to synthesise the composite adsorbent ZIF-8/PANI/CCH. Finally, after vacuum freeze-dried, a white and well structured ZIF-8/PANI/CCA(ZIF-8/polyaniline/coconut aerogel) was obtained. The loading mass ratios of ZIF-8 on CCA and PANI/CCA were 11.3% and 37.5%, respectively, which indicates that PANI as interface layers can effectively promote the in-situ growth of ZIF-8. The obtained composite adsorbent (ZIF-8/PANI/CCA) was applied for the adsorption of tetracycline (TC)，and the removal efficiency reaches over 91.6%. This strategy may provide an effective and versatile pathway to increase MOF loading mass on natural polysaccharide aerogel and sequentially branch out their applications in pollutant treatment fields.
