氧化石墨烯膜的制备、改性及应用研究进展

石墨烯的衍生物——氧化石墨烯(GO)因可实现逐层堆叠,在片层之间形成一定间距的纳米通道,通过粒子的尺寸大小不同,进行尺寸筛分,故可应用于物质的选择性分离,在膜材料领域引起了研究者们的广泛关注.基于氧化石墨烯独特的二维结构,为探索氧化石墨烯在膜分离领域的应用,对氧化石墨烯分离膜的制备技术及改性进行简要地概述.在氧化石墨烯...

Research Progress on Preparation, Modification and Application of Graphene Oxide Membrane

Graphene oxide (GO), a derivative of graphene, can be stacked layer by layer to form nanochannels between layers, so it can be applied to selective separation of substances, which has attracted wide attention of researchers in the field of membrane materials. Based on the unique two-dimensional structure of graphene oxide, in order to explore its application in the membrane separation field, the preparation technology and modification of graphene oxide separation membrane are briefly summarized. Among the preparation methods of graphene oxide separation membrane, there are various research reports on the preparation technology. Several common preparation methods, such as spin coating, vacuum filtration, dip coating, spray coating, layer-by-layer self-assembly, etc., are introduced, and the research results of the corresponding preparation methods are compared and analyzed. Graphene oxide materials are mainly modified by doping or surface functional gene group grafting, and surface modification can improve the selectivity and water flux of GO membrane to some ions or enhance the mechanical stability and anti-pollution of the membrane. Graphene oxide membrane has shown excellent separation characteristics in oil-water separation, sewage purification, seawater desalination, gas separation, heavy metal ion separation, and other fields. Finally, the future development and challenges of graphene oxide separation membranes at the above three levels are prospected.