NH2-MIL-125(Ti)/TiO2纳米复合材料分子印迹光电化学传感器的构建及测定蔬菜中毒死蜱  

Construction of NH2-MIL-125(Ti)/TiO2 Nanocomposite Molecularly Imprinted Photoelectrochemical Sensor and Determination of Chlorpyrifos in Vegetables

作　　者：金党琴[1] 徐洁[1] 王珍 吴耀月 龚爱琴[1] 王元有[1] 周慧[1] JIN Dang-qin;XU Jie;WANG Zhen;WU Yao-yue;GONG Ai-qin;WANG Yuanyou;ZHOU Hui(Chemical Engineering Institute,Yangzhou Polytechnic Institute,Yangzhou 225127,China)

机构地区：[1]扬州工业职业技术学院化学工程学院,江苏扬州225127

出　　处：《化学试剂》2020年第2期154-158,共5页Chemical Reagents

基　　金：扬州市重点研发计划项目(YZ2018049);江苏高校“青蓝工程”资助项目(苏教师[2018]12号、[2016]15号);江苏省第五期“333高层次人才培养工程”项目(苏人才[2016]7号,BRA2017479);江苏省高等学校优秀科技创新团队项目(苏教科[2017]6号);江苏省自然科学基金资助项目(BK20181219)。

摘　　要：以NH2-MIL-125(Ti)/TiO2纳米复合材料为载体,毒死蜱为模板分子,戊二醛为交联剂,采用电聚合的方法合成了毒死蜱分子印迹聚合物膜,并以此印迹膜构建光电化学传感器,采用电流-时间法(I-t)对蔬菜中毒死蜱进行检测,结果表明在1.0×10^-8~2.0×10^-6 mol/L浓度范围内与峰电流线性良好,相关系数为R^2=0.992 3,检测限为2.0×10^-9 mol/L,并且具有较高的选择性识别能力、良好的再生性和稳定性。方法实现了蔬菜样品中痕量毒死蜱的检测。Using NH2-MIL-125(Ti)/TiO2 nanocomposite as carrier,chlorpyrifos as template molecule and glutaraldehyde as crosslinker,chlorpyrifos molecularly imprinted polymer membrane was synthesized by electropolymerization,and photoelectrochemical sensor was constructed by using the membrane.The sensor was tested by current-time method(I-t).The peak current was linear in the concentration range of 1.0×10^-8~2.0×10^-6 mol/L,and the correlation coefficient was R^2=0.992 3.The detection limit was 2.0×10^-9 mol/L,and has high selectivity recognition,good reproducibility and stability.The method achieves the detection of trace chlorpyrifos in vegetable samples.

关 键 词：NH2-MIL-125(Ti)/TiO2 毒死蜱 分子印迹 蔬菜 光电化学 传感器 

分 类 号：O65[理学—分析化学]