中文摘要：由于农业的迅速发展和严格的环保措施，地下水中农药残留检测已成为一个非常重要且关键的研究领域。本文采用CuO-TiO2制备的混合纳米材料装饰炭电极制作非酶型电化学传感器，用来检测地下水中甲基对硫磷农药残留。本文通过循环伏安法观测修饰电极的电化学行为，验证该修饰电极可用于甲基对硫磷的检测；优化条件下，采用微分脉冲伏安法对其甲基对硫磷检测能力进行评价，结果发现，该修饰电极可以在0-2000 ppb范围有选择性地检测甲基对硫磷残留，检测限为1.21 ppb，且其他材料对甲基对硫磷残留检测无任何影响。此外，应用修饰电极检测实际地下水样本的甲基对硫磷残留也表现出高敏感性；因此，本文所制备非酶型电化学传感器在甲基对硫磷农药残留检测方面具有较大的应用潜力，为地下水中其他有机磷农药残留检测提供了新的思路。
外文摘要：Detection of pesticides in ground water has become a very important and crucial research area due to the rapid expansion of agriculture and stringent environmental protection acts. In this paper, the as-prepared CuO-TiO2 hybrid nanocomposites were decorated on the glass carbon electrode as the nonenzymatic electrochemical nanosensor for the sensitive and selective detection of methyl parathion. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, showing that the modified electrode can be used for methyl parathion detection. Differential pulse voltammetry was applied to evaluate methyl parathion detection ability under optimized experimental conditions, and found the modified electrode can detect methyl parathion sensitively in a wide dynamic detection range from 0 ppb to 2000 ppb with a lower limit of detection (LOD) of 1.21 ppb. In addition, other interfering materials have no any influences on the detection of methyl parathion. Furthermore, the modified electrode has also been used for methyl parathion detection in the actual ground water samples, and showed efficient sensing ability. The electrochemical sensor developed would have great potentiality for methyl parathion sensing and provide new insights into the detection of other organophosphorous pesticides in the ground water. (C) 2017 Elsevier B.V. All rights reserved.
外文关键词：CuO-TiO2 nanocomposites, Methyl parathion, Electrochemical sensor, Differential pulse voltammetry
作者：Tian, Xike; Liu, Lin; Li, Yong; Yang, Chao; Zhou, Zhaoxin; Nie, Yulun; Wang, Yanxin
作者单位：China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China..
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL
期刊影响因子：5.401
出版年份：2017
出版刊次：12
点击下载：基于CuO-TiO2的非酶型电化学传感器及其敏感且具有选择性地检测地下水甲基对硫磷农药残留研究