氧化石墨烯薄膜具有独特的水渗透能力及离子选择性，在水处理和分离领域具有广阔的应用前景，是当前科学研究的前沿热门领域之一。其传质特性主要由氧化石墨烯层间的二维亲水毛细管通道决定，因此如何实现对氧化石墨烯层间结构的原位探测，了解并调控其固液界面特性是调控氧化石墨烯薄膜传质特性的关键。在本项目中，基于同步辐射衍射技术，在上海光源设计搭建氧化石墨烯固液界面研究平台，发展亚秒级时间分辨的固液界面二维衍射实验方法，针对氧化石墨烯在溶液中的层间结构特性与调控，氧化石墨烯中层间水的结构与相变，金属离子与氧化石墨烯的相互作用机制等基础问题进行系统性研究。本项目的实施期望推动氧化石墨烯固液界面特性的深入研究和同步辐射关联技术的应用发展。

Because of its unique 2-dimensional structure, graphene oxide membranes have attracted much attention in the scientific community and exhibit great potential in filtration, sieving and separation applications. The interlayer distances of graphene oxide membranes play an important role in understanding their remarkable selectivity in permeation of water molecules and other ions. Based on synchrotron radiation X-ray diffraction techniques, in this project, we intend to build an in-situ solid-liquid platform at beamline BL14B1 of Shanghai Synchrotron Radiation Facility, and develop the sub-second two-dimensional solid-liquid X-ray diffraction technique. Basing on this platform, we will study the microstructure of graphene oxide in solution, the structure and phase transition of water in the interlayer of graphene oxide, the interlayer interaction of graphene with ions. Through this project, we will provide a frontier in-situ synchrotron radiation solid-liquid platform and time-resolved x-ray diffraction techniques for domestic and international researchers.