改性氮化碳/铜基MOF纳米复合材料修饰电极对草甘膦的电化学检测研究  

Functionalized Carbon Nitride/Copper-based MOF Nanocomposites Modified Electrode for Electrochemical Detection of Glyphosate

作　　者：王琪[1,2] 刘瑶 舒傲澜[1,2] 熊婵如 陈星 WANG Qi;LIU Yao;SHU Aolan;XIONG Chanru;CHEN Xing(Institute of Industry and Equipment Technology,Hefei University of Technology,Hefei 230009,China;School of Resource and Environmental Engineering,Hefei University of Technology,Hefei 230009,China;School of Material Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学工业装备与技术研究院,安徽合肥230009 [2]合肥工业大学材料科学与工程学院,安徽合肥230009 [3]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《聊城大学学报（自然科学版）》2024年第3期22-33,共12页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(21777164);安徽省科技重大专项项目(202003a07020004)资助。

摘　　要：使用铜基MOF材料(Cu-BTC)和含羰基杂环的介孔氮化碳(CN)合成的纳米复合材料修饰电极构建了电化学传感器,采用差分脉冲伏安法检测水环境中的草甘膦。该传感器的检测机理是通过Cu^(2+)与草甘膦发生络合反应,使得响应电流发生降低。所制备的材料通过扫描电子显微镜、透射电子显微镜、X射线衍射技术、X射线光电子能谱和傅立叶变换红外光谱等进行表征,确认了其形貌与结构。实验结果表明,该传感器具有高的灵敏度,检出限为0.1576 pg/L,线性范围为10^(-6)~10^(-12)g/L,对草甘膦具有良好的选择性。当评估该传感器以检测实际水样中的草甘膦时,回收率达到94%~107%,表现出很高的准确性和实用性。The electrochemical sensor was constructed based on the nanocomposite,which was synthesized from copper-based MOF(Cu-BTC)and mesoporous carbon nitride(CN)containing carbonyl heterocyclic rings.The as-fabricated sensor was used for the detection of glyphosate with the differential pulse voltammetry method.The detection mechanism of the sensor is the decrease in the response current caused by the complexation reaction between Cu^(2+)and glyphosate.To confirm the morphology and structure of the nanocomposite,it was characterized by scanning electron microscopy,transmission electron microscopy,X-ray diffraction technology,X-ray photoelectron spectroscopy,and Fourier transform infrared spectroscopy.The results showed that the sensor had a highly sensitive response toward glyphosate in a linear range of 10^(-6)~10^(-12)g/L with a detection limit of 0.1576 pg/L,and it had good selectivity for glyphosate.When the sensor was used for the detection of glyphosate in real water samples,the recoveries were in the range of 94%~107%,demonstrating its high accuracy and practicality.

关 键 词：差分脉冲伏安法 Cu-BTC 介孔氮化碳 电化学检测 草甘膦 

分 类 号：X52[环境科学与工程—环境工程]