A new non-enzymatic glucose sensor based on copper/porous silicon nanocomposite
A new non-enzymatic glucose sensor based on copper/porous silicon nanocomposite
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DOI：
10.1016/j.electacta.2014.01.031
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发表时间：
2014-03-20
影响因子：
6.6
通讯作者：
Rezaei, B.
中科院分区：
文献类型：
--
作者：
Ensafi, Ali A.;Abarghoui, M. Mokhtari;Rezaei, B.
在HF/HNO3溶液中对硅（Si）粉进行化学刻蚀，制备Cu/PSI（铜/多孔硅）纳米复合粉体，然后在以CuSO4为金属前驱体的溶液中对刻蚀后的PSI粉进行化学镀铜纳米颗粒。采用x射线衍射（XRD）、扫描电镜（SEM）、循环伏安法（CV）和傅里叶变换红外光谱（FT-IR）对合成的纳米复合材料进行了表征。采用Cu/PSi纳米复合材料对碳糊电极（CPE）进行修饰，制备了无酶Glc传感器，表明其具有良好的化学稳定性、电化学稳定性和电催化氧化作用。采用循环伏安法和计时电流法研究了Cu/Psi纳米复合材料在碱性和中性溶液中氧化Glc的电催化活性。该传感器具有小于4 s的快速安培响应时间、长时间稳定性和良好的信号重现性，具有1.0 ~ 190.0 μ mol dm（-3）和190 μ mol dm(-3) ~ 2.3 μ mol dm（-3）两个线性范围，检出限为0.2 μ mol dm（-3）。该传感器不受抗坏血酸、多巴胺、尿酸、果糖和柠檬酸等常见干扰。这种新型电极材料具有分析性能好、成本低、制备方法简单等优点，为开发高效的Glc传感器提供了良好的前景。(C) 2014 Elsevier Ltd.版权所有。
Cu/PSI (copper/porous silicon) nanocomposite powder was prepared by chemical etching of silicon (Si) powder in a HF/HNO3 solution, followed by electrodless plating of copper nanoparticles on the etched PSi powder in a solution containing CuSO4 as a metal precursor. The resulting nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV) and FT-IR spectroscopy. The copper nanoparticles in PSi support show the good chemical and electrochemical stability as well as electrocatalytic effect on Glc oxidation, hence the Cu/PSi nanocomposite was used to modify carbon paste electrode (CPE) to fabricate non-enzymatic Glc sensor. The electrocatalytic activity of Cu/Psi nanocomposite was investigated for Glc oxidation in alkaline and neutral solutions using cyclic voltammetry and chronoamperometry. The novel developed sensor displayed a fast amperometric response time of less than 4 s, long time stability, good signal reproducibility and two linear ranges from 1.0 to 190.0 mu mol dm(-3) and 190 mu mol dm(-3) to 2.3 mu mol dm(-3) of Glc with a detection limit of 0.2 mu mol dm(-3). The sensor exhibited no interference from common interferences such as ascorbic acid, dopamine, uric acid, fructose and citric acid. The good analytical performance, low cost and easy preparation method made this novel electrode material promising for the development of effective Glc sensor. (C) 2014 Elsevier Ltd. All rights reserved.