基于多壁碳纳米管修饰碳印刷电极的高灵敏液相硫化氢传感器  

Highly Sensitive Liquid Phase Hydrogen Sulfide Sensor Based on Multi-Walled Carbon Nanotubes Modified Carbon Screen-Printed Electrode

作　　者：沈费宸 周呈 李崭虹 赵雪伶[1] 王静荣[1] 朱志刚[1,2] SHEN Feichen;ZHOU Cheng;LI Zhanhong;ZHAO Xueling;WANG Jingrong;ZHU Zhigang(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海第二工业大学环境与材料工程学院,上海201209 [2]上海理工大学医疗器械与食品学院,上海200093

出　　处：《上海第二工业大学学报》2021年第1期8-14,共7页Journal of Shanghai Polytechnic University

基　　金：上海第二工业大学研究生项目基金(EGD19YJ0027)资助。

摘　　要：以PET为基底,导电银浆和碳浆为原料,通过丝网印刷技术制备一次性可抛弃式丝网印刷电极(screenprinted electrode, SPE),并且将多壁碳纳米管与萘酚水溶液复合物修饰于工作电极表面。利用扫描电子显微镜对SPE进行表征,以循环伏安法及计时电流法对硫化钠溶液进行测试。通过改变测试溶液pH和电位优化测试条件,结果表明,在pH为9的磷酸缓冲溶液中,测试电位为0.1 V时,碳纳米管修饰SPE对液相硫化氢有最佳的电化学响应。该传感器具有宽线性范围(0.5μmol/L~7.24 mmol/L),良好的抗干扰性、检测选择性和低的检测限。Disposable screen-printed electrode(SPE) was prepared by screen printing technology with PET as substrate, conductive silver paste and carbon paste as raw materials, and the composite of multi-walled carbon nanotube and Nafion aqueous solution was modified on the working electrode surface. The SPE was characterized by scanning electron microscope, and sodium sulfide solution was tested by cyclic voltammetry and chronoamperometry. By varying the p H and potential of the test solutions to optimize the test conditions, and the results show that in the phosphate buffer solution with pH 9 and the test potential of 0.1 V, the carbon nanotube modified SPE has the best electrochemical response to hydrogen sulfide in liquid phase. The sensor has a wide linear range(0.5 μmol/L~7.24 mmol/L), good anti-interference, good detection selectivity and low detection limit.

关 键 词：电化学传感器 丝网印刷电极 硫化钠 碳纳米管材料 

分 类 号：X511[环境科学与工程—环境工程]