纳米TiO_2-碳纳米管复合膜修饰电极伏安法测定水中α-萘酚和β-萘酚  

Voltammetric Determination of α-naphthol and β-naphthol by a Nano-TiO_2/MWNTs Composite Film Modified Glassy Carbon Electrode

作　　者：卫应亮[1,2] 邵晨[1] 韩华峰 张路平[1] 李超[1] 刘宝军[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]洛阳理工学院环境工程与化学系,河南洛阳471023 [3]河南省环境保护厅,河南郑州450004

出　　处：《环境监测管理与技术》2009年第4期36-39,共4页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(20871107);河南省杰出青年科研基金资助项目(0612002700);河南省基础与前沿技术研究计划基金资助项目(072300420010)

摘　　要：制备了一种新型的纳米TiO2-碳纳米管复合膜修饰电极,在pH值为5.57的NaAc-HAc缓冲溶液中,研究了α-萘酚和β-萘酚在该修饰电极上的电化学行为,据此建立了纳米TiO2-碳纳米管复合膜修饰电极伏安法测定水中α-萘酚和β-萘酚的方法。优化了试验条件,α-萘酚和β-萘酚分别在8.3×10-7mol/L^1.0×10-5mol/L和7.8×10-7mol/L^1.0×10-5mol/L范围内,浓度与氧化峰电流呈良好的线性关系,开路富集3 min,检出限分别为3.5×10-7mol/L和2.3×10-7mol/L,模拟水样测定的回收率为97.6%~101%。A new nano-TiOE/MWNTs composite film modified electrode was prepared. In pH 5.57 NaAc-HAc buffer solution, the electrochemical behavior of α-naphthol and β-naphthol were investigated with differential pulse voltammetry at the modified electrode. Under the optimum experimental conditions, the linear calibration ranges were 8.3×10^-7mol/L to 1.0×10^-5mol/L for α-naphthol and 7.8×10^-7mol/L to 1.0×10^-5mol/L for β-naphthol. The concentration and the current of oxidation peak showed good linear relationship. The detection limits of 3.5×10^-7 mol/L for α-naphthol and 2.3×10^-7mol/L for β-naphthol in 3 min open-circuit pre- concentration. The recoveries of simulated water samples were from 97.6% to 101%.

关 键 词：Α-萘酚 Β-萘酚 纳米TiO2 碳纳米管 修饰电极 伏安法 模拟水样 

分 类 号：O657.1[理学—分析化学]