School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China; Zhejiang University City College, Hangzhou 310015, China.
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310013, China.
Carbohydr Polym. 2022 Nov 15;296:119969. doi: 10.1016/j.carbpol.2022.119969. Epub 2022 Aug 10.
Metal-organic frameworks (MOFs) and their derived powder catalysts are prone to agglomerate and difficult to recycle in water, thus resulting in their low utilization and secondary pollution in water treatment. Herein, a composite aerogel (CoFe0.8@NCNT@CA) loaded with bimetallic MOF-derived carbon nanotubes on cellulose aerogel was developed for activating peroxymonosulfate (PMS) to degrade tetracycline (TC). The CoFe0.8@NCNT@CA/PMS system exhibits an excellent TC removal rate (97.1 % TC removal within 20 min). The outstanding performance of the composite catalyst is closely related to the synergistic effect of bimetallic catalytic sites, graphitic N structure, and porous network. Interestingly, carbon nanotubes and cellulose in the composite catalyst form a semi-coated porous structure, which can effectively enhance the adhesion of carbon nanotubes and expose abundant active sites while ensuring mass transfer. This study provides a strategy for synthesizing novel composite aerogel with an excellent structure and physicochemical properties for water treatment.
金属-有机骨架（MOFs）及其衍生的粉末催化剂在水中容易团聚且难以回收，因此在水处理中利用率低且会产生二次污染。在此，开发了一种负载在纤维素气凝胶上的双金属 MOF 衍生碳纳米管的复合气凝胶（CoFe0.8@NCNT@CA），用于活化过一硫酸盐（PMS）以降解四环素（TC）。CoFe0.8@NCNT@CA/PMS 体系在 20 min 内即可实现 97.1%的 TC 去除率。复合催化剂的优异性能与其双金属催化位点、石墨 N 结构和多孔网络的协同效应密切相关。有趣的是，催化剂中的碳纳米管和纤维素形成了一种半包覆的多孔结构，这种结构可以有效地增强碳纳米管的附着力并暴露丰富的活性位点，同时保证传质。该研究为合成具有优异结构和物理化学性质的新型复合气凝胶用于水处理提供了一种策略。
