【摘要】 利用二氧化钛/碳纳米管(Ti O2/CNTs)纳米复合物对鲁米诺电致化学发光信号的增敏作用发展了一种检测葡萄糖的方法。通过溶胶-凝胶法合成Ti O2/CNTs纳米复合物,将其修饰在玻碳电极表面后,发现其能够很好地增强反应体系的电致化学发光强度,H2O2能与鲁米诺发生反应产生电致化学发光信号,结合葡萄糖在葡萄糖氧化酶作用下所产生的H2O2对发光体系具有良好的响应特性,可以实现葡萄糖的检测。本方法检测葡萄糖的线性范围为1.0×1007~5.0×1006mol/L,检出限为5.2×1008mol/L。本研究为葡萄糖的检测提供了一种灵敏、快速、简便、经济的方法。同时,Ti O2/CNTs纳米复合物修饰电极为电致化学发光信号增强提供了一种新材料。更多还原

【Abstract】 A novel luminol electrochemiluminescence strategy based on titanium dioxide / carbon nanotubes( Ti O2/ CNTs) nanocomposites for detection of glucose was developed. First,the Ti O2/ CNTs nanocomposites were prepared by a sol-gel method and modified on the glassy carbon electrode. The electrochemiluminescence( ECL) signal could be greatly enhanced when the electrode was established by the nanocomposites,which finally resulted in the increased sensitivity. Glucose oxidase calalyzed the oxidation of glucose to form H2O2,and the H2O2 reacted with luminol to produce the ECL signal. Thus the above system was proved to be efficient for glucose detection. The modified electrode exhibited excellent ECL signals and a good linear range of 1. 0 × 10!7- 5. 0 × 10!6mol / L with a detection limit of 5. 2 × 10!8mol / L towards glucose detection. This strategy was successfully demonstrated as a sensitive,rapid,simple and cost-effective method to detect glucose. Meanwhile,the Ti O2/ CNTs nanocomposites offered a novel material for the signal enhancement in electrochemiluminescence sensor.更多还原