表面增强拉曼光谱(SERS)是纳米材料展现的一类特殊纳米尺度效应，可以提供待测样品的指纹特征，可实现对目标物的快速、灵敏检测和识别，因而在环境有机污染物检测领域广受关注。SERS的增强因子与材料本身的尺寸，形态，成分有很大的关系。本项目通过水热合成法在Ti箔基片上制备TiO2/Ag的SERS基底。通过调节实验方法和参数的关系来获得不同的单一形貌的基底材料，研究不同形貌的TiO2/Ag的SERS基底对金属纳米粒子表面的等离子共振和探针分子的电子转移共振两种增强因子的相互制约和共振具有重要的意义。TiO2/Ag具有的光催化性能，通过紫外光照射可以快速清除基底表面的有机污染物，达到自修复的功能，研究重复使用效率，对发展低成本的SERS材料具有重要的意义。本项目的研究可以丰富SERS基底的材料，探讨贵金属-半导体氧化物的SERS基底，使它们具有协同促进SERS的增强能力以及光降解能力。

Organic pollutants are widely distributed in the nature, which have severe adverse effects on human health and environment. It is crucial to develop rapid，economical and sensitive method for the detection of organic pollutants. Surface Enhanced Raman Scattering (SERS) has been a growing area of interest in recent years due to its potential as are liable, high-resolution detection technique for extremely minute quantities of target molecules. SERS enhancement factors not only connected with the size of the material itself, but also its morphology and composition. In this work, the controllable preparation TiO2/Ag SERS substrates based on Ti foils was researched using hydrothermal treatment method. We can adjust the relationship of experimental methods and parameters to obtain different single morphology of substrate materials. It has the vital significance using different morphology of TiO2/Ag SERS substrates to study mutual restriction and the resonance factors for metal nanoparticles surface plasma resonance and probe the resonant of electron transfer. The work in this project enriched the SERS substrate materials research and is a combination of noble metal with semiconductor SERS-active substrate，building the composite system for their synergetic contribution to SERS and photodegradation.