SERS活性可控银纳米材料合成及其检测水环境中痕量持久性有机污染物应用

This project was based on overcoming the disadvantages of the existing nanotechnology in trace persistent organic pollution (POPs) detection in terms of low selectivity and sensitivity problems in China. The preparation and optimization methods of the silver SERS substrate with a high selectivity, sensitivity and accuracy were designed and developed. The internal relations between the preparation conditions, substrate morphologies, modifying molecules (gripper molecules) and SERS performance were explored. On this basis, the stable and controllable SERS substrates were obtained and their application in the detection of trace POPs in water environment was studied. Finally, a new method for efficient, rapid detection of trace POPs was established.

本项目旨在解决现有纳米技术在痕量持久性有机污染物(POPs)检测方面存在的选择性不高和灵敏度不够等问题，以我国水环境中痕量POPs检测的纳米材料设计与构建为出发点，设计开发出一套具有高选择性、高灵敏度和高准确度的银SERS基底制备和优化方案，深入探索制备条件、基底形貌、修饰分子（抓手分子）与SERS性能之间的内在联系。在此基础上，开发和制备稳定的活性可控的SERS基底并将其应用于水环境中痕量POPs检测，系统地分析实际样品中痕量POPs的残留情况，从而建立起高效、快速检测痕量POPs的光谱分析新方法。

青年基金紧密围绕研究目标，探讨了纳米银制备参数与其形貌、尺寸以及表面增强拉曼光谱（SERS）活性之间的内在联系及其规律，获得了几种性能优异的银纳米材料，研究发现添加剂的种类对纳米银的形貌和尺寸具有决定性影响；通过进一步优选巯基环糊精为抓手分子修饰所得的纳米银材料，提高了纳米材料SERS检测的选择性、灵敏度和准确性，并讨论了银纳米材料产生SERS活性的可能机理。在此基础上，以纳米银材料作为SERS活性基底，检测了水中数种POPs的含量，获得了其SERS谱图，初步建立了测量痕量持久性有机污染物（POPs）的新的光谱分析方法。该项目对SERS机理研究、应用以及痕量有机污染物残留分析都会有很好的指导意义。它不仅能极大的拓宽SERS的应用范围，而且能够提供适当的模型来检验SERS理论从而促进人们对SERS机理的认识。总结上述工作，将上述工作发表在不同国内外刊物上。项目执行期间发表12篇SCI论文，完成了预定的研究目标。