基于Pt/PEDOT/PSS-Graphene复合材料的H2O2生物传感器  

H_2O_2 Biosensor Based on Pt/PEDOT/PSS-Graphene Composite

作　　者：范丽丽[1] 樊友军[1] 王珊珊[1] 赖婷婷[1] 武丽娜[1] 沈星灿[1] 

机构地区：[1]药用资源化学与药物分子工程教育部重点实验室,广西师范大学化学化工学院,广西桂林541004

出　　处：《传感技术学报》2013年第4期446-451,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(21263002);广西自然科学基金创新团队项目(2010GXNSFF013001);药用资源化学与药物分子工程教育部重点实验室课题项目(CMEMR2012-A3)

摘　　要：以聚苯乙烯磺酸钠(PSS)功能化的石墨烯为载体原位聚合聚-3,4-乙烯二氧噻吩(PEDOT)制备PEDOT/PSS-Graphene复合材料,然后将该复合材料修饰于玻碳电极(GCE)表面制得PEDOT/PSS-Graphene/GCE电极,并在此基础上电沉积负载Pt纳米颗粒构建了一种新的无酶H2O2生物传感器。利用扫描电子显微镜(SEM)对制得的修饰电极进行表征,同时通过循环伏安法和计时电流法研究了该传感器对H2O2的响应性能。结果表明,所制备的传感器对H2O2检测有极快的响应速度(1.5 s),在11.57μmol/L～3.60 mmol/L H2O2浓度范围内成线性相关,检出限为9.27μmol/L,且具有良好的重现性、稳定性和选择性。The Poly（3,4-ethylenedioxythiophene）（PEDOT）/polystyrene sulfonic acid sodium（PSS）-Graphene/glassy carbon electrode（GCE）was prepared by modifying PEDOT/PSS-Graphene composite on a GCE,which was synthesized through in situ polymerization of PEDOT on PSS functionalized graphene.A novel non-enzymatic H2O2 biosensor was fabricated by electrodepositing Pt nanoparticles on the PEDOT/PSS-Graphene/GCE electrode.The modified electrodes were characterized by scanning electron microscope（SEM）.The response properties of the biosensor to H2O2 were investigated by cyclic voltammetry and chronoamperometry.The results indicated that the as-prepared biosensor had very fast response time（1.5 s）for H2O2 detection,and the response currents had good linear relation with H2O2 concentration in the range of 11.57 μmol/L-3.60 mmol/L with a detection limit of 9.27 μmol/L,as well as excellent reproducibility,stability and selectivity.

关 键 词：H2O2生物传感器 聚-3 4-乙烯二氧噻吩 石墨烯 Pt纳米颗粒 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]