碳纳米笼/碳纳米管复合物修饰电极制备及检测双酚A  

An electrochemical sensor for detection of bisphenol A based on carbonnanocage/carbon nanotube composites

作　　者：汤妙姗 凌丽靖 邓严华 陈建华 方丽君[1] 王景梅 TANG Miaoshan;LING Lijing;DENG Yanhua;CHEN Jianhua;FANG Lijun;WANG Jingmei(College of Chemisty and Environmental Science,Minnan Normal University,Zhangzhou 363000;Fujian Province University Key Laboratory of Modern Analytical Science and Separation Technology,Minnan Normal University,Zhangzhou 363000)

机构地区：[1]闽南师范大学化学化工与环境学院,漳州363000 [2]福建省现代分离分析科学与技术重点实验室,闽南师范大学,漳州363000

出　　处：《分析试验室》2020年第5期527-531,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(21676133)资助。

摘　　要：通过水热反应合成羧基化碳纳米管(CNT-COOH)和碳纳米笼(CNCs)的纳米复合物(CNCs/CNT-COOH)。利用透射电子显微镜(TEM)、傅立叶红外光谱(FTIR)和热重分析(TGA)表征该复合材料。利用循环伏安法(CV)、差分脉冲伏安法(DPV)和交流阻抗法(EIS)研究CNCs/CNT-COOH/GCE修饰电极的电化学行为。结果表明,CNCs/CNT-COOH/GCE对双酚A的电化学氧化显示出优异的选择性和电催化活性。双酚A的氧化峰电流值与其浓度在2~200μmol/L范围内呈现良好的线性关系,经计算可得双酚A的检出限为0. 8524μmol/L (S/N=0. 0437),灵敏度为-0. 1539μA/(μmol/L)。将CNCs/CNT-COOH/GCE用于检测双酚A显示出灵敏度高、检测范围宽和稳定性良好的优点。Nanocomposites( CNCs/CNT-COOH) of carboxylated carbon nanotubes( CNT-COOH) and carbon nanohollow lattices( CNCs) were synthesized by hydrothermal approach. Morphologies of the composite were characterized by scanning electron microscopy( TEM),Fourier transform infrared spectroscopy( FTIR) and thermograrimetric analysis( TGA). Cyclic voltammetry( CV),differential pulse voltammetry( DPV) and electrochemical impedance spectroscopy( EIS) were carried out to characterize the electrochemical behaviors of the CNs/CNT-COOH/GCE modified electrode. The results showed that the electrochemical oxidation of bisphenol A by CNCs/CNT-COOH/GCE possessed excellent selectivity and electrocatalytic activity. The oxidation peak current value of bisphenol A showed a good linear relationship with the concentration in the range of 2-200 μmol/L. The detection limit of bisphenol A was 0. 8524 μmol/L( S/N = 0. 0437) with the sensitivity of-0. 1539 μA/( μmol/L). The use of CNCs/CNT-COOH/GCE for electrochemical detection of bisphenol A exhibited high sensitivity,wide detection range and good stability.

关 键 词：碳纳米管 碳纳米笼 电化学检测 双酚A 

分 类 号：O657.1[理学—分析化学]