Research of Using a New Type of Cu/Cu2O/TiO2 Electrode Detecting Saccharides Content
Abstract: Cu/Cu2O/TiO2 (CCT) nanotube arrays electrode has been fabricated by secondary anodic oxidation combination of electrodeposition method. The structure and morphology of the CCT were charac-terized by X-ray diffraction (XRD) and Scanning electron microscope (SEM) respectively and the electrochemical performances of the electrode were performed on electrochemical workstation. The SEM result showed that the large sized, cluster-liked Cu/Cu2O particles have dispersed in CCT nanotubes. When the electrode was used as electrocatalytic oxidation of the glucose, fructose and sucrose under 0.1 M of NaOH aqueous solution, the tested results showed that the glucose has the highest oxidated current, the fructose has the lowest oxidated electric potential but the sucrose has the poorest electrocatalytic oxidation performance among these three saccharides. Moreover, when the electrode was utilized as detection for the low concentrations of saccharides, the electrode showed excellent detection performance for fructose. Its linear response could reach up to 3.5 mM (R2 = 0.99) with detection limit of 1.3 μM (signal/noise = 3) and the sensitivity is 3560 µA cm−2•mM−1. Meanwhile, the electrode showed outstanding electrocatalytic oxidation performance that the oxidation electric current could reach to 8 mA cm−2 for the glucose and fructose mixed aqueous solution. The electrode had the potential application prospect and expected to be applied in carbohydrate fuel cells.
文章引用: 谭 林 , 龙 梅 , 唐爱东 (2017) 新型Cu/Cu2O/TiO2电极检测糖含量的研究。 材料科学， 7， 423-430. doi: 10.12677/MS.2017.73056
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