A sensitive voltammetric sensor for taxifolin based on graphene nanosheets with certain orientation modified glassy carbon electrode
A sensitive voltammetric sensor for taxifolin based on graphene nanosheets with certain orientation modified glassy carbon electrode
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DOI：
10.1016/j.snb.2014.11.008
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发表时间：
2015-03
影响因子：
8.4
通讯作者：
Fei Wang;Yanjuan Wu;K. Lu;B. Ye
中科院分区：
文献类型：
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作者：
Fei Wang;Yanjuan Wu;K. Lu;B. Ye
在氧化石墨烯胶体溶液中，采用脉冲电位法在玻碳电极上电沉积具有优选垂直取向的还原氧化石墨烯（ERGO）薄膜。采用方波吸附溶出伏安法 (SWASV)，首次将 ERGO 薄膜应用于开发用于检测花旗松素的高灵敏度电化学传感器。与裸玻碳电极（GCE）相比，所得电极（ERGO/GCE）通过显着增强氧化还原峰值电流并减少峰峰分离，对花旗松素的氧化还原表现出优异的响应。在所选条件下，峰电流与花旗松素浓度在1.0×10−8~1.0×10−6mol L−1范围内呈线性关系，检出限为2.0×10−9mol L−1。此外，ERGO/GCE还表现出优异的选择性、稳定性、重现性和重复性。
The electrodeposition of reduced graphene oxide (ERGO) film with preferred vertical orientation was fabricated on a glassy carbon electrode by using pulse potential method in a graphene oxide colloidal solution. Using square wave adsorptive stripping voltammetry (SWASV), the ERGO film was applied for the first time, in developing a high-sensitive electrochemical sensor for detection of taxifolin. Compared with bare glassy carbon electrode (GCE), the resulting electrodes (ERGO/GCE) exhibited excellent response toward the redox of taxifolin by significantly enhancing the redox peak currents and decreasing the peak-to-peak separation. Under the selected conditions, the peak currents were linear relationship with taxifolin concentration in the range of 1.0 × 10−8–1.0 × 10−6mol L−1, with detection limit of 2.0 × 10−9mol L−1. Besides, the ERGO/GCE also exhibited an excellent selectivity, stability, reproducibility and repeatability.