Gu Jiahui, Fan Hongwei, Li Chunxi, Caro Jürgen, Meng Hong
Beijing Key Laboratory of Membrane Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstrasse 3A, 30167, Hannover, Germany.
Angew Chem Int Ed Engl. 2019 Apr 8;58(16):5297-5301. doi: 10.1002/anie.201814487. Epub 2019 Feb 6.
Graphene/MOF-based composite materials in three-dimensional (3D) architectures are promising for the treatment of oil-containing wastewater by absorption owing to their intrinsic properties of graphene and metal-organic frameworks (MOFs), such as high porosity, ultralow density, and facilely tailored superwettability. In this study, novel wrinkled 3D microspherical MOF@rGO composites with both superhydrophobic and superoleophilic properties were developed by embedding MOF nanoparticles between graphene oxide (GO) nanosheets, followed by high-temperature reduction self-assembly. The microspherical composites feature a unique micro/nano hierarchy consisting of crumpled reduced GO (rGO) nanosheets intercalated with well-dispersed MOF nanoparticles. Combined with the superwettability and abundant meso/microporosity, the peculiar architectures of wrinkled ZIF-8@rGO microspheres show very fast absorption rates and high sorption selectivity for organic solvents and oils from water.
基于石墨烯/金属有机框架（MOF）的三维（3D）结构复合材料，因其石墨烯和金属有机框架（MOF）的固有特性，如高孔隙率、超低密度和易于定制的超润湿性，在通过吸附处理含油废水方面具有广阔前景。在本研究中，通过将MOF纳米颗粒嵌入氧化石墨烯（GO）纳米片之间，随后进行高温还原自组装，制备了具有超疏水和超亲油特性的新型皱纹状3D微球形MOF@rGO复合材料。微球形复合材料具有独特的微/纳层级结构，由褶皱的还原氧化石墨烯（rGO）纳米片插层并均匀分散着MOF纳米颗粒组成。结合超润湿性和丰富的介孔/微孔结构，皱纹状ZIF-8@rGO微球的特殊结构对水中的有机溶剂和油类表现出非常快的吸附速率和高吸附选择性。
