摘要
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。
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 TiO_(2) nanotube arrays(TiO_(2)NTAs/Ag)is obtained.The composition and structure of the TiO_(2)NTAs/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 TiO_(2)NTAS/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 TiO_(2)NTAs/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.
作者
张晓丽
彭玉美
王庆伟
秦利霞
刘肖霞
康诗钊
李向清
ZHANG Xiao-Li;PENG Yu-Mei;WANG Qing-Wei;QIN Li-Xia;LIU Xiao-Xia;KANG Shi-Zhao;LI Xiang-Qing(School of Chemistry and Chemical Engineering,Shangqiu Normal College,Shangqiu 476000,China;School of Chemical and Environmental Engineering,Shanghai Institude of Technology,Shanghai 201418,China)
出处
《应用化学》
CAS
CSCD
北大核心
2022年第7期1147-1156,共10页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(No.21771125)
上海市科委地方能力建设项目(No.19090503700)资助。
