Ag纳米片包覆的ZnAl层状双金属氢氧化物阵列对有机污染物的SERS活性

项目名称： Ag纳米片包覆的ZnAl层状双金属氢氧化物阵列对有机污染物的SERS活性

项目编号： No.21303211

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： 唐海宾

作者单位： 中国科学院合肥物质科学研究院

项目金额： 25万元

中文摘要： 有机污染物严重危害生态环境和人类健康。传统检测有机污染物的方法过程复杂、耗时、成本高，基于表面增强拉曼散射（SERS）光谱的新方法快速、灵敏，有望实现快速、痕量检测。然而，许多有机分子是非极性的，难以被SERS衬底吸附。因而，即使SERS衬底的活性很高，也很难对其高灵敏度检测。该项目以表面包覆高活性Ag纳米片的ZnAl层状双金属氢氧化物（ZnAl-LDH）复合结构阵列作为SERS衬底，有望实现对非极性有机分子的痕量、快速检测。通过离子交换，使ZnAl-LDH纳米片由亲水性转变为疏水性，实现对非极性分子的有效强吸附；利用表面包覆的平行交错排列的Ag纳米片的高SERS活性，实现对目标分子的快速、痕量检测。研究衬底制备技术、优化SERS活性，探究表面改性对有机分子的吸附机理，实现对其高效吸附。为用SERS技术快速检测痕量有机污染物提供科学依据与核心材料，奠定相关技术基础，对保护环境具有重要意义。

中文关键词： 表面增强拉曼散射；层状双金属氢氧化物；银纳米结构；吸附富集；有机污染物

英文摘要： The organic pollutions are seriously harmful to ecological environment and human health. The traditional detection techniques for organic pollutions are complicated, time-consuming, costly, the new detection technique based on surface-enhanced Raman scattering (SERS) spectroscopy is rapid, sensitive, and promising for the realization of rapid trace detection. However, so many organic pollutions are nonpolar molecules, having low affinity to the SERS substrates, as a result, the SERS substrates cannot detect them sensitively even the activity is high. This project will use the hybridstructure of Ag nanosheets coated ZnAl layered double hydroxide (ZnAl-LDH) nanosheets array as the SERS substrate, which is promising for the realization of rapid trace detection to the nonpolar target molecules. Realize the powerful adsorption to the nonpolar molecules via ion exchange, making the ZnAl-LDH become to hydrophobicity from hydrophilicity; Realize the rapid trace detection to the target molecules with the high SERS activity of the parallel or staggered aligned Ag nanosheets on the surface of ZnAl-LDH nanosheets array. Study on fabrication technology of the substrate and optimization of the SERS activity, explore the adsorption mechanism of surface modification to organic molecules and realize the powerful adsorption to th

英文关键词： surface-enhanced Raman scattering；layered double hydroxide；silver nanostructures；adsorption and enrichment；Organic pollutants