碳纳米管/纳米二氧化钛-聚苯胺载铂复合电极微分脉冲法测定葡萄糖  

Carbon nanotubes/nanocrystlline TiO_2-PAn film loaded Pt complex electrode determines glucose by differential pulse stripping voltammetry

作　　者：吴何珍[1] 褚道葆[2] 陈忠平[2] 尹晓娟[2] 

机构地区：[1]安庆职业技术学院,安徽安庆246003 [2]安徽师范大学化学与材料科学学院,安徽芜湖241000

出　　处：《化学研究与应用》2007年第5期479-482,共4页Chemical Research and Application

基　　金：国家自然科学基金(20476001)项目资助;安徽省自然科学基金(00045317)项目资助

摘　　要：研究了多壁碳纳米管／纳米二氧化钛-聚苯胺载铂（CNT／nanoTiO2-PAn-Pt）复合电极对葡萄糖的电催化氧化作用。以0．5mol／LKOH水溶液为底液，采用微分脉冲法在-0．5—0．2V电位区间扫描，在-0．33V（vs，SCE）附近产生的氧化电流峰灵敏度高且峰型好，故以此峰为定量峰。葡萄糖浓度在1．25×10^-2～1．0×10^-5mol／L与峰电流呈良好的线性关系，线性相关系数为0．99881，检出限为5．0×10^-6mol／L。加入0．06mmol／L的抗坏血酸或0．3mmol／L的尿酸（模拟人血成份）均不干扰葡萄糖的测定。该电极对模拟血液中葡萄糖的测定。结果令人满意。Electrocatalytic oxidation of glucose on carbon nanotubes/nanocrystllineTiO2-PAn film loaded Pt （CNT/nanoTiO2-PAn- Pt） complex electrode was investigated by cyclic voltammetry and chronopotentiometry. Under the optimum conditions （0. 5 mol/L KOH solution）, scan potention is -0. 5 ～ 0. 2V by differential pulse stripping voltammetry. One peak is produced sensitively and well-defined at near -0. 33V （ vs. SCE）. This is taken for the quantitative determination peak. The linear range of glucose is 1.25 × 10^-2 ～ 1.0 × 10^5 mol/L （ r = 0. 899）. The detection limit is 1.0 × 10^4 mol/L 0. 06 m mol/L ascorbic acid or 0. 3m mol/L uric acid （simulate the blood composition of man） etc, did not interfere with the determination. The results revealed that the modified electrode could be used to the determination of glucose in imitative samples with good results.

关 键 词：碳纳米管/纳米TiO2-PAn膜载Pt复合电极 葡萄糖 电催化氧化 微分脉冲法 

分 类 号：O646[理学—物理化学]