超灵敏SERS基底的构筑及其在催化与检测中的应用

Fabrication of the Highly Sensitive SERS Substrate for Monitoring the Catalytic Degradation of Organic Pollutants and Detection of Polycyclic Aromatic Hydrocarbon

表面增强拉曼光谱(SERS)由于其极高的灵敏度和选择性在分析化学、材料科学、生物医学、环境监测等领域具有巨大的应用前景,SERS在向实际应用体系延伸的过程中,兼具多功能性质应用的材料是当今SERS基底构筑的发展方向。这里我们介绍两种超灵敏SERS基底的构筑方法及其在催化与检测中的应用:一种是银箔/ZnO纳米纤维的构筑,并利用这种SERS基底检测有机污染物的光催化降解动力学过程;一种是超疏水超亲油的三维网状结构的金/泡沫镍材料的构筑,建立了一套分离、富集的系统对环境中持久性有机污染物进行SERS检测。

Despite much effort has been done to fabricate various types of SERS substrate,it remains a great challenge to develop a multifunctional composite nanomaterial as SERS substrates.Herein,we have fabricated two kinds of highly sensitive SERS substrates for monitoring the catalytic degradation of organic pollutants and the detection of polycyclic aromatic hydrocarbon.(1)We demonstrated a simple and reliable two-step strategy based on an electrospinning technique combined with in situ calcination process for the fabrication of ZnO nanofibers deposited on a silver foil surface.This new substrate can be used as a SERS substrate for determining the catalytic activity and reaction kinetics during the photodegradation of organic pollutants.(2)We demonstrated the fabrication of a 3Dhydrophobic SERS substrate enabling the ultrasensitive detection of various analytes with poor affinity for adsorption on conventional SERS substrates.Such 3Dhydrophobic SERS substrates could be applied as an oilwater separation system for the separation,enrichment and sensitive detection of pollutants in real environments.