State Key Laboratory of Solid Lubrication, Center of Eco-materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Sci Rep. 2017 Jul 13;7(1):5347. doi: 10.1038/s41598-017-05755-6.
Using graphene as adsorbent for removal of pollutants from polluted water is commonly recognized to be costly because the graphene is usually produced by a very complex process. Herein, a simple and eco-friendly method was employed to fabricate efficient superparamagnetic graphene/polyaniline/FeO nanocomposites for removal of dyes. The exfoliation of graphite as nanosheets and the functionalization of nanosheets with polyaniline and FeO nanoparticles were simultaneously achieved via a one-pot reaction process combining the intercalation polymerization of aniline and the co-precipitation of the residual Fe and the generated Fe. The obtained graphene/polyaniline/FeO nanocomposites exhibited excellent adsorption performance for Congo red, even in the presence of Brilliant green. The adsorption kinetics and adsorption isotherms were well fitted with pseudo second-order kinetic model and Langmuir isotherm model, respectively. In a word, this method is simple and industrially feasible, which provides a new approach to fabricate highly efficient graphene-based adsorbents on large scale for removal of dyes. In addition, it also can be used to exfoliate other two-dimensional materials, such as boron nitride, carbon nitride and MoS for a range of possible applications.
使用石墨烯作为吸附剂来去除受污染水中的污染物通常被认为是昂贵的，因为石墨烯通常是通过非常复杂的工艺生产的。在此，采用了一种简单且环保的方法来制备高效的超顺磁石墨烯/聚苯胺/FeO 纳米复合材料，用于去除染料。通过将苯胺的插层聚合和剩余的 Fe 和生成的 Fe 的共沉淀结合在一个一锅反应过程中，同时实现了石墨的剥离为纳米片以及纳米片与聚苯胺和 FeO 纳米颗粒的功能化。所得的石墨烯/聚苯胺/FeO 纳米复合材料对刚果红表现出优异的吸附性能，即使存在亮绿也如此。吸附动力学和吸附等温线分别很好地符合拟二级动力学模型和 Langmuir 等温线模型。总之，这种方法简单且工业上可行，为大规模制备高效的基于石墨烯的吸附剂提供了一种新途径，用于去除染料。此外，它还可以用于剥离其他二维材料，如氮化硼、碳氮化物和 MoS，以实现一系列可能的应用。
