废液中铀酰类化合物超灵敏检测用SERS基底纳米结构的设计与构建

项目名称： 废液中铀酰类化合物超灵敏检测用SERS基底纳米结构的设计与构建

项目编号： No.21501157

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 化学工业

项目作者： 吴昊曦

作者单位： 中国工程物理研究院

项目金额： 20万元

中文摘要： 表面增强拉曼光谱（SERS）因其具有原位、无损、快速、超灵敏分析等特点，能应用于铀酰类化合物的检测。但由于铀酰离子与SERS基底裸露的金或银表面产生强相互作用，导致基底不同其SRES峰位向低波数段发生不同程度的偏移。本项目旨在发展一系列既能阻隔铀酰类化合物与基底裸露的金或银表面相互接触，也能提供活性热点的纳米结构作为检测化学组成复杂的废液中铀酰类化合物的SERS基底，如金/石墨烯杂化纳米结构、金/碳核-壳纳米结构、“三明治”杂化纳米结构等；通过对铀酰类化合物水溶液标准样品的SERS检测，筛选出增强效果最优异的基底，并以此建立铀酰类化合物的“标准”SERS谱库，进而实现对废液中铀酰类化合物的快速、超灵敏检测。

中文关键词： 铀酰类化合物；表面增强拉曼光谱；纳米结构；超灵敏检测；废液

英文摘要： Surface enhanced Raman spectroscopy (SERS) with excellent advantages for in-situ, non-destructive, fast and ultrasensitive analysis of chemicals, has been applied in detection of uranyl compounds. However, due to the strong adsorption between uranyl species and the surface Ag or Au, the varying degrees of significant spectral shift to lower wavenumber for the symmetric stretch of the uranyl ion always occurred by making use of existing SERS substrates. This project aims to research on fabrication of SERS substrates with special nanostructures, such as Au/graphene hybrid nanostructures, Au/carbon core-shell nanostructures, “sandwich” hybrid nanostructures, etc., which should not only prevent the uranyl compounds in contact with the surface of Ag or Au, but also supply sufficient hot spots for detection of complex uranyl compounds in waste water. And the nano-substrate with best SERS performance will be selected by using all kinds of prepared SERS substrates for analysis of normal samples of different uranyl compounds. Based on these, we will establish the “standard” SERS spectral library of uranyl compounds to achieve ultrasensitive and fast detection of complex uranyl compounds in waste water.

英文关键词： uranyl compounds;SERS;nanostructure;ultrasensitive detection;waste water