纳米Ag/TiO_(2)纳米管阵列基底构建及表面增强拉曼散射光谱检测与降解盐酸四环素北大核心CSCD

将阳极氧化与光还原法结合,在TiO_(2)纳米管阵列(TiO_(2)NTAs)表面修饰Ag纳米粒子,获得一种均匀有序、稳定性高且可循环的TiO_(2)NTAs/Ag活性基底。采用X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、紫外可见漫反射光谱(UV-Vis DRS)、表面增强拉曼散射光谱(SERS)和扫描电子显微镜(SEM)等手段对TiO_(2)NTAs/Ag的组成和结构进行了表征。进一步研究了该TiO_(2)-NTAs/Ag阵列对盐酸四环素(TC-HCl)的SERS响应,结果表明,该复合基底对TC-HCl具有较高的检测灵敏度,在水中检测限可达1×10^(?14) mol/L,而TiO_(2)-NTAs与Ag之间的协同效应对其检测性能的提高起着关键作用。此外,TiO_(2)NTAs/Ag基底在光照下对TC-HCl展示了优异的降解活性,且至少可循环使用8次。表明该TiO_(2)NTAs/Ag基底在环境中有机污染物的SERS检测和降解领域具有潜在的应用前景。

Construction of Nano Ag Modified TiO2 Nanotube Array Substrate for Surface Enhanced Raman Scattering Detection and Degradation of Tetracycline Hydrochloride

By combining anodic oxidation with photo-reduction method， a uniform， stable and recyclable surface enhanced Raman scattering （SERS）-active substrate composed of well-ordered Ag nanoparticles decorated on TiO₂ nanotube arrays （TiO₂NTAs/Ag） is obtained. The composition and structure of the TiO₂NTAs/Ag are characterized using X-ray powder diffraction （XRD）， X-ray photoelectron spectroscopy （XPS）， UV-Vis diffuse reflection spectrum （UV-Vis DRS）， surface enhanced Raman scattering spectroscopy （SERS） and scanning electron microscope （SEM） measurements. The SERS response of the TiO₂NTAS/Ag array to tetracycline hydrochloride （TC-HCl） is further studied， which exhibits superior sensitivity for SERS detection of TC-HCl， and the detection limit could reach 1 × 10^－14 mol/L in water. In addition， the TiO₂NTAs/Ag substrate exhibits excellent degradation activity for TC-HCl under light and could be recycled for at least 8 times. It shows a potential application in SERS detection and degradation of organic contaminants in environment.