二氧化钛分子印迹膜传感器光电流法检测克百威  

Detection of Carbofuran by Photocurrent Method Based on TiO_2 Molecularly Imprinted Membrane

作　　者：冯莎莎[1] 梁春凤[1] 梁顺超 魏小平[1] 李建平[1] 

机构地区：[1]广西电磁化学功能物质重点实验室广西高校食品安全与检测重点实验室桂林理工大学化学与生物工程学院,广西桂林541004

出　　处：《分析测试学报》2017年第5期684-688,共5页Journal of Instrumental Analysis

基　　金：国家自然科学基金项目(21375031);广西自然科学基金创新研究团队项目(2015GXNSFFA139005);广西高等学校高水平创新团队及卓越学者计划项目(桂教人[2014]49号);广西岩溶地区水污染控制与用水安全保障协同创新中心项目

摘　　要：利用TiO_2膜制作了一种分子印迹光电化学传感器用来测定克百威。研究了掺杂改性对TiO_2光催化效率的影响,结果表明掺杂Au的TiO_2分子印迹膜对克百威有较好的光催化降解作用。对膜厚度和吸附时间等实验条件进行优化。在最佳实验条件下,克百威浓度在1.00×10^(-9)~2.20×10^(-7)mol/L范围内与光电流呈良好的线性关系,检出限(S/N=3)为1.10×10^(-10)mol/L。该TiO_2分子印迹膜有较好的灵敏度、选择性和稳定性。利用该传感器对水样中克百威进行测定,回收率为98.7%~104.0%。A molecularly imprinted photocurrent chemical sensor was fabricated by using TiO2 film for the detection of earbofuran. Effect of doping modification on photocatalytic efficiency of TiOa was studied. The results showed that the molecularly imprinted membrane of Au doped TiO2 had a good detection effect on the template molecule carbofuran. The experimental conditions such as film thickness and adsorption time were optimized. The experimental results showed that the concentrations of carbofuran had a good liner relationship with photoeurrent in the range of 1.00 × 10-9 - 2.20 × 10-7 mol/L under the optimal experimental conditions, and the detection limit （ S/N = 3 ） was 1.10 × 10-m mol/L. The sensor has demonstrated outstanding features such as excellent sensitivity, selectivity and stability. The determination of earbofuran in water was carried out by using the sensor, and the recoveries were in the range of 98.7% - 104. 0% .

关 键 词：分子印迹 克百威 二氧化钛 光电流 传感器 

分 类 号：O657.1[理学—分析化学] F767.2[理学—化学]