Zeolite imidazolate framework/graphene aerogels (ZIF/GAs) were synthesized via a counter diffusion method for wastewater purification. XRD, FTIR, Raman, XPS spectroscopy, and FESEM technique were applied to characterize the structure and morphology of the aerogels, and the results confirmed that the ZIF/GAs exhibited a 3D interconnected macroporous framework of graphene sheets with uniform dispersion of ZIF particles. The adsorption performance of the as-prepared ZIF-67/GA and ZIF-8/GA was investigated by adsorbing dyes. The adsorption capacities showed that the ZIF-67/GA had higher adsorption efficiency than the ZIF-8/GA and pristine graphene aerogels towards dyes. The adsorption ability of the ZIF/GAs towards anionic MO dye was relatively larger than that of cationic RhB dye, ascribed to the different electrostatic attraction and π-π interaction of ZIF/GAs to dyes. The adsorption kinetics of the ZIF/GAs towards dyes were studied as well. As such, the prepared ZIF/GAs composites are the perfect candidates for pollutants removal and water purification.

通过反扩散法合成了咪唑沸石分子筛/石墨烯气凝胶（ZIF / GAs），用于废水净化。应用XRD，FTIR，拉曼，XPS光谱和FESEM技术表征了气凝胶的结构和形貌，结果证实ZIF / GAs具有石墨烯片的3D互连大孔骨架，且ZIF颗粒均匀分散。该吸附通过吸附染料研究了所制备的ZIF-67 / GA和ZIF-8 / GA的性能。吸附能力表明，ZIF-67 / GA比ZIF-8 / GA和原始石墨烯气凝胶对染料的吸附效率更高。ZIF / GAs对阴离子MO染料的吸附能力比阳离子RhB染料要大，这归因于ZIF / GAs对染料的静电吸引和π-π相互作用。还研究了ZIF / GA对染料的吸附动力学。因此，制备的ZIF / GAs复合材料是去除污染物和净化水质的理想之选。