新型螺旋状 TiO2 纳米管阵列修饰的 Cu2O 用于无酶葡萄糖氧化。
Novel helical TiO2 nanotube arrays modified by Cu2O for enzyme-free glucose oxidation.
机构信息
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
出版信息
Biosens Bioelectron. 2014 Sep 15;59:243-50. doi: 10.1016/j.bios.2014.03.032. Epub 2014 Mar 29.
A helical TiO2 nanotube (TNT) array modified with cuprous oxide (Cu2O) electrode was fabricated and used for nonenzymatic glucose detection. The structure and morphology of Cu2O/TNT were characterized by X-ray diffraction and transmission electron microscopy. The electrocatalytic performance of Cu2O/TNT electrode for glucose oxidation was investigated by cyclic voltammetry and chronoamperometry. At an applied potential of +0.65 V versus SCE, a linear range was obtained within the concentration range of 3.0-9.0 mM with a detection limit of 62 μM (signal/noise=3). The response time was approximately 3 s after adding 0.10 mM glucose. Formate and gluconic acid were identified as the main products of the glucose oxidation using (1)H NMR spectrometry. A possible mechanism for continuous glucose oxidation was also proposed.
采用氧化铜（Cu2O）修饰的螺旋状 TiO2 纳米管（TNT）阵列被制备并用于非酶葡萄糖检测。Cu2O/TNT 的结构和形态通过 X 射线衍射和透射电子显微镜进行了表征。通过循环伏安法和计时电流法研究了 Cu2O/TNT 电极对葡萄糖氧化的电催化性能。在相对于 SCE 的 +0.65 V 的施加电位下，在 3.0-9.0 mM 的浓度范围内获得了线性范围，检测限为 62 μM（信号/噪声=3）。加入 0.10 mM 葡萄糖后，响应时间约为 3 s。使用（1）H NMR 光谱法鉴定了甲酸盐和葡萄糖酸是葡萄糖氧化的主要产物。还提出了一种连续葡萄糖氧化的可能机制。
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