Au/rGO修饰的单壁碳纳米管柔性电极的制备及其在生物传感器中的应用  

Preparation of Au nanoparticles/rGO modified single-walledcarbon nanotube flexible electrode and their application for biosensors

作　　者：文可彬 朱天翔 赵新洛[1] 盛雷梅[1] 安康[1] WEN Kebin;ZHU Tianxiang;ZHAO Xinluo;SHENG Leimei;AN Kang(Collegeof Sciences,Shanghai University,Shanghai 200444,China;College of Sciences,Changzhou Institute of Technology,Changzhou 213032,China)

机构地区：[1]上海大学理学院物理系,上海200444 [2]常州工学院理学院,江苏常州213032

出　　处：《功能材料》2022年第10期10203-10211,共9页Journal of Functional Materials

基　　金：国家自然科学基金项目(52071194)。

摘　　要：柔性可穿戴生物传感器对于慢性病人的健康监测具有重要意义。由单壁碳纳米管制成的巴基纸具备柔性好、导电性高及生物相容性强等特点,是制备柔性生物传感器电极的理想材料。由于单壁碳纳米管本身不具备催化活性,有必要使用活性材料对巴基纸进行修饰。本研究首次将单壁碳纳米管巴基纸与一步法还原的金纳米颗粒/还原氧化石墨烯溶液通过简单的真空抽滤形成双层结构的柔性电极。通过扫描电子显微镜、X射线衍射仪、紫外分光光度计、拉曼光谱仪对制备的柔性电极进行了形貌与结构的表征,结果表明金和氧化石墨烯被还原,其中金纳米颗粒的粒径大小为80~100nm左右,且密集地修饰在还原氧化石墨烯上。探究了该柔性电极对葡萄糖和H_(2)O_(2)的电化学行为,结果表明该电极对葡萄糖和H_(2)O_(2)表现出优异的电催化活性,在检测浓度范围内呈现良好的线性关系,其中H_(2)O_(2)检测灵敏度高达1533μA·(mmol/L)^(-1)cm^(-2),说明单壁碳纳米管巴基纸在柔性生物传感器领域具备较高的潜在价值。Flexible and wearable biosensors are important for the health monitoring of chronic patients.Buckypaper made of single-walled carbon nanotubes,is flexible,conductive and biocompatible,so it s an ideal electrode material for flexible biosensors.As single-walled carbon nanotube s lack of catalytic activity,it s necessary to modify buckypaper with active materials.In this paper,single-walled carbon nanotube buckypaper and one-step reduced gold nanoparticles/reduced graphene oxide solution are simply vacuum filtered to form a double-layer flexible electrode for the first time.The morphology and structure of the prepared flexible electrode are characterized by scanning electron microscope,X-ray diffraction equipment,ultraviolet spectrophotometer and Raman spectrometer.The results show that gold and graphene oxide are reduced.The size of gold nanoparticles is about 80-100 nm.The reduced graphene oxide is intensively modified by gold nanoparticles.The electrochemical behavior of the flexible electrode for glucose is investigated.This electrode shows excellent electrocatalytic activity for glucose and H_(2)O_(2),linear relationship in the detection range,and the H_(2)O_(2) sensitivity is as high as 1533μA/(mmol/L·cm^(2)).Thus this work reveals that single-walled carbon nanotube buckypaper is potentially valuable for flexible biosensors.

关 键 词：葡萄糖 过氧化氢 巴基纸柔性电极 无酶传感器 碳纳米管 

分 类 号：TB332[一般工业技术—材料科学与工程]