利用ZIF-8@Ag复合材料构筑SERS基底及其对痕量TNT的检测  

Construction of SERS Substrates by ZIF-8@Ag Composites and Detection of Trace TNT

作　　者：刘毅 余数温 何璇[2] 黄石亮[2] 刘渝[2] 李显寅 王敦举[1] LIU Yi;YU Shu⁃wen;HE Xuan;HUANG Shi⁃liang;LIU Yu;LI Xian⁃yin;WANG Dun⁃ju(School of National Defense Science and Technology,Southwest University of Science and Technology,Mianyang 621010,China;Institute of Chemical Materials,CAEP,Mianyang 621999,China)

机构地区：[1]西南科技大学国防科技学院,四川绵阳621010 [2]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2020年第2期164-169,共6页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(21502179)

摘　　要：采用表面增强拉曼散射(SERS)技术检测痕量梯恩梯(TNT),采用光还原法合成的ZIF-8@Ag复合材料作为SERS基底,利用场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、X射线粉末衍射(XRD)对复合材料的结构和性能进行表征。结果表明,银纳米颗粒(AgNPs)均匀分布在ZIF-8表面;复合材料具有良好的SERS增强活性,对奈尔兰(NBA)的增强因子为8.84×10^3;利用自组装技术将探针4-巯基苯酚(4-ATP)修饰在基底表面,探针4-ATP与TNT的分子间π-π作用使其对TNT有选择性识别效果,检测TNT的浓度低至10-9mol·L^-1。The detection of trace trinitrotoluene(TNT)explosives by Surface Enhanced Raman Scattering(SERS)was studied. A novel organic metal framework ZIF-8@Ag composites material prepared by in situ growth was used as SERS substrates. Meanwhile,the structure and properties of the composites were characterized by field emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM)and X-ray powder diffraction(XRD). Results show that the ZIF-8@Ag composites material has good SERS activity,and the enhancement factor is calculated as 8.84×10^3. The probe 4-ATP is self-assembled on the surface of AgNPs. And it could selectively recognize TNT by the interaction of probe 4-ATP and TNT molecules. The detection limit is as low as 10-9 mol·L^-1. In addition,the mechanism of the interaction between the probe 4-ATP and TNT was studied by ultraviolet spectroscopy,which found that TNT and 4-ATP formed Meisenheimer complex.

关 键 词：表面增强拉曼散射(SERS) 梯恩梯(TNT) 痕量检测 复合材料 传感技术 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O65[理学—分析化学]