Pt/DNA-MWCNTs/GC电极制备及其H_2O_2还原的电催化活性  

Preparation of Pt/DNA-MWCNTs/GC Electrode and Its Electrocatalytic Activity toward H_2O_2 Reduction

作　　者：范丽丽[1] 武丽娜[1] 屈志宇 刘丹凤[1] 张俊明[1] 樊思明 樊友军[1] 

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

出　　处：《电化学》2014年第5期459-464,共6页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.21263002);广西自然科学基金项目(No.2013GXNSFAA019024);广西教育厅科学技术研究项目(No.2013YB026);药用资源化学与药物分子工程教育部重点实验室课题(No.CMEMR2012-A3);广西研究生教育创新计划(No.2010106020703M67)资助

摘　　要：将DNA功能化多壁碳纳米管（MWCNTs）复合材料修饰于玻碳基底（GC）表面制得DNA-MWCNTs/GC电极,并在此基础上电沉积负载Pt纳米颗粒构建了一种新型无酶H2O2传感电极.利用扫描电子显微镜（SEM）表征制得的修饰电极,同时通过循环伏安法和计时电流法研究了该传感电极的H2O2响应性能.结果表明,该传感电极的H2O2检测在0.04～18.07 mmol·L-1浓度范围内成线性相关,检出限3.85μmol·L-1（S/N=3）,且有良好的重现性、稳定性与选择性.The DNA-multi-walled carbon nanotubes （MWCNTs）/glassy carbon （GC） electrode was prepared by modifying the DNA functionalized MWCNTs composite on a GC electrode. A novel non-enzymatic H2O2 sensing electrode was fabricated by electrodepositing Pt nanoparticles on the DNA-MWCNTs/GC electrode. The modified electrodes were characterized by scanning electron microscopy （SEM）. The response properties of the sensing electrode to H2O2 were investigated by cyclic voltammetry and chronoamperometry. The results indicated that the sensing electrode exhibited a good linear relationship between response current and H2O2 concentration in the range of 0.04 - 18.07 mmol. L-1 with a detection limit of 3.85μmol· L-1 （SIN = 3）, as well as excellent reproducibility, stability and selectivity.

关 键 词：DNA 功能化 多壁碳纳米管 PT H2O2检测 

分 类 号：O657.1[理学—分析化学] O613.71[理学—化学]