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首页> 外文期刊>Electroanalysis >A Novel Enzymatic Glucose Biosensor and Nonenzymatic Hydrogen Peroxide Sensor Based on (3-Aminopropyl) Triethoxysilane Functionalized Reduced Graphene Oxide
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A Novel Enzymatic Glucose Biosensor and Nonenzymatic Hydrogen Peroxide Sensor Based on (3-Aminopropyl) Triethoxysilane Functionalized Reduced Graphene Oxide

机译：基于（3-氨基丙基）三乙氧基硅烷官能化的石墨烯氧化物的新型酶糖苷生物传感器和非酶氢过氧化氢传感器

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摘要

In the present study, a novel enzymatic glucose biosensor using glucose oxidase (GOx) immobilized into (3-aminopropyl) triethoxysilane (APTES) functionalized reduced graphene oxide (rGO-APTES) and hydrogen peroxide sensor based on rGO-APTES modified glassy carbon (GC) electrode were fabricated. Nafion (Nf) was used as a protective membrane. For the characterization of the composites, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffractometer (XRD), and transmission electron microscopy (TEM) were used. The electrochemical properties of the modified electrodes were investigated using electrochemical impedance spectroscopy, cyclic voltammetry, and amperometry. The resulting Nf/rGO-APTES/GOx/GC and Nf/rGO-APTES/GC composites showed good electrocatalytical activity toward glucose and H2O2, respectively. The Nf/rGO-APTES/GC electrode exhibited a linear range of H2O2 concentration from 0.05 to 15.25 mM with a detection limit (LOD) of 0.017 mM and sensitivity of 124.87 mu A mM(-1)cm(-2). The Nf/rGO-APTES/GOx/GC electrode showed a linear range of glucose from 0.02 to 4.340 mM with a LOD of 9 mu M and sensitivity of 75.26 mu A mM(-1)cm(-2). Also, the sensor and biosensor had notable selectivity, repeatability, reproducibility, and storage stability.
机译：在本研究中，使用固定成（3-氨基丙基）三乙氧基硅烷（APTES）的葡萄糖氧化酶（GOX）的新型酶糖苷生物传感器基于RGO改性玻璃碳（GC ）制造电极。 Nafion（NF）用作保护膜。为了表征复合材料，使用傅里叶变换红外光谱（FTIR），X射线粉末衍射仪（XRD）和透射电子显微镜（TEM）。使用电化学阻抗谱，循环伏安法和安培测定来研究改性电极的电化学性质。得到的NF / RGO Aptes / GOX / GC和NF / RGO - APTES / GC复合材料分别向葡萄糖和H2O2分别显示出良好的电催化活性。 NF / RGO-APTES / GC电极显示出从0.05至15.25mm的线性范围，检测限为0.017mm，灵敏度为124.87μmm（-1）cm（-2）。 NF / RGO-APTES / GOX / GC电极显示出0.02至4.340mm的葡萄糖的线性范围，含量为9μm，灵敏度为75.26μmm（-1）cm（-2）。此外，传感器和生物传感器具有显着的选择性，可重复性，再现性和存储稳定性。

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