氧化石墨烯铀酰离子印迹复合材料的合成及在铀分离回收与富集中的应用

项目名称： 氧化石墨烯铀酰离子印迹复合材料的合成及在铀分离回收与富集中的应用

项目编号： No.11305244

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李峥

作者单位： 中国科学院上海应用物理研究所

项目金额： 24万元

中文摘要： 随着我国核能事业的发展，铀资源的回收利用及获得也占有越来越重要的地位。本项目拟合成一种新型氧化石墨烯铀酰离子印迹复合材料，此材料具有吸附容量高、选择性强、适用pH值范围广、化学及辐照稳定性好等特点，可用于乏燃料后处理、海水、油田水及盐湖等中的铀分离回收、提取及定量富集分析。研究内容包括氧化石墨烯及氧化石墨烯铀酰离子印迹复合材料的合成，并用SEM、TEM、FT-IR、XPS、XRD、TG-DTA等手段对其进行表征，对表面结构进行验证鉴定；考察复合材料的化学及辐照稳定性；通过静态吸附及柱分离实验对铀酰吸附、解吸性能进行考察，并针对不同样品提出合适的分离回收及富集工艺流程；通过热力学实验、动力学实验及同步辐射技术对其吸附分离机理及铀酰配合物进行深入探讨，为此种铀吸附分离材料的进一步研究提供理论指导。

中文关键词： 氧化石墨烯；铀；离子印迹聚合物；吸附；

英文摘要： With the development of nuclear power in our country, the recycling and extraction of uranium resource become more and more important. A novel graphene oxide-uranyl ion imprinted materials will be synthesized in this project. It exhibits high adsorption capacity, strong selectivity, wide pH value application range, good chemical and irradiation stability, and could be used for uranium separation, recovery, extraction and quantitative concentration analysis in spent fuel reprocessing, seawater, oilfield water and salt lakes. The research content includes the synthesis of graphene oxide and graphene oxide-uranyl ion imprinted materials, which will be characterized by SEM, TEM, FT-IR, XPS, XRD and TG-DTA to identify the surface structure. The chemical and irradiation stability of the composite materials will be studied. The adsorption and desorption properties of uranyl will be studied by batch and column experiments and the appropriate process used for separation, recovery and concentration of uranium will be proposed through column experiments. The thermodynamic, dynamics experiments and synchrotron radiation technology will be used to discuss the adsorption mechanism and uranyl complex structure and it would afford a theoretical guidance for the further research of uranyl adsorbent.

英文关键词： graphene oxide；uranium；ion-imprinted polymer；adsorption；