Ce-TiO<sub>2</sub>/carbon Nanotube Composite Modified Glassy Carbon Electrode for Electrochemical Detection of Caffeic Acid

Xiaoyi Long; Yu Xie; Jinyin Chen; Ruyi Li; Limin Lu

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Ce-TiO₂/carbon Nanotube Composite Modified Glassy Carbon Electrode for Electrochemical Detection of Caffeic Acid

机译：Ce-TiO _{2 /碳纳米管复合修饰玻碳电极电化学检测咖啡酸}

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In this paper, cerium doped titanium dioxide/carbon nanotubes (Ce-TiO 2 /CNTs) composite wassuccessfully prepared, and the Ce-TiO 2 /CNTs modified glassy carbon electrode (Ce-TiO 2 /CNTs/GCE)was applied to the electrochemical detection of caffeic acid (CA). Electrochemical methods such ascyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to characterize theelectrochemical behaviors of the Ce-TiO 2 /CNTs/GCE. Electrochemical data indicates the Ce-TiO 2 /CNTs/GCE possesses a higher peak current for CA oxidation compared with bare GCE, Ce-TiO 2 /GCE and CNTs/GCE. Combined with the good catalytic ability of Ce-TiO 2 and the large specificsurface area as well as the excellent electrical conductivity of CNTs, the Ce-TiO 2 /CNTs exhibitedexcellent electrochemical sensing of CA. Under the optimum conditions, the oxidation peak current atCe-TiO 2 /CNTs/GCE had a good linear relationship with CA concentration in the range of 1.0 nM to10.0 μM.

机译：本文成功地制备了铈掺杂的二氧化钛/碳纳米管（Ce-TiO 2 / CNTs）复合材料，并将Ce-TiO 2 / CNTs修饰的玻碳电极（Ce-TiO 2 / CNTs / GCE）应用于电化学。检测咖啡酸（CA）。用电化学方法如循环伏安法（CV）和微分脉冲伏安法（DPV）表征了Ce-TiO 2 / CNTs / GCE的电化学行为。电化学数据表明，与裸露的GCE，Ce-TiO 2 / GCE和CNTs / GCE相比，Ce-TiO 2 / CNTs / GCE具有较高的CA氧化峰值电流。结合Ce-TiO 2的良好催化能力和较大的比表面积以及CNTs的优异电导率，Ce-TiO 2 / CNTs具有优异的CA电化学感应性能。在最佳条件下，Ce-TiO 2 / CNTs / GCE处的氧化峰电流与CA浓度在1.0 nM至10.0μM范围内具有良好的线性关系。

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《International Journal of Electrochemical Science》 |2019年第8期|共10页
作者
Xiaoyi Long; Yu Xie; Jinyin Chen; Ruyi Li; Limin Lu;
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中图分类化学;
关键词
Caffeic acidCerium-titanium dioxideCarbon nanotubesModified electrode;

机译：咖啡酸铈钛白碳纳米管修饰电极;

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Ce-TiO2/carbon Nanotube Composite Modified Glassy Carbon Electrode for Electrochemical Detection of Caffeic Acid

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Ce-TiO₂/carbon Nanotube Composite Modified Glassy Carbon Electrode for Electrochemical Detection of Caffeic Acid