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首页> 外文期刊>Journal of nanoscience and nanotechnology >Non-Enzymatic Amperometric Glucose Biosensor from Zinc Oxide Nanoparticles Decorated Multi-Walled Carbon Nanotubes
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Non-Enzymatic Amperometric Glucose Biosensor from Zinc Oxide Nanoparticles Decorated Multi-Walled Carbon Nanotubes

机译：从氧化锌纳米粒子非酶安培葡萄糖生物传感器装饰多壁碳纳米管。

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摘要

The present work describes the development of novel ZnO dispersed multi-walled carbon nanotubes (MWNT) based non-enzymatic glucose biosensor with 1 M NaOH solution as the supporting electrolyte. For a comparison, the same material has been used for the fabrication of enzymatic biosensor and studied its electrochemical activity with phosphate buffer solution as the electrolyte. MWNT have been synthesized by catalytic chemical vapor decomposition (CCVD) and a simple sol-gel method was used for decorating crystalline ZnO nanoparticles on MWNT. Cyclic voltammetry and chronoamperometry were used to study and optimize the electrochemical performance of the resulting enzymatic and non-enzymatic ZnO/MWNT biosensors. The non enzymatic Nafion/ZnO/MWNT/GC electrode shows linearity in the range 700 nM to 31 mM with the detection limit of 500 nM. Similarly enzymatic biosensor fabricated using Nafion/GOD/ZnO/MWNT on glassy carbon electrode (GCE) shows a linearity from 1 μM to 22 mM. This excellent performance of non enzymatic Nafion/ZnO/MWNT/GC is due to high surface area, good electron transfer rate of ZnO/MWNT and the high electrochemical catalytic activity of ZnO in NaOH solution.
机译：本工作描述了以1M NaOH溶液为支持电解质的新型ZnO分散多壁碳纳米管（MWNT）非酶葡萄糖生物传感器的开发。为了进行比较，将相同的材料用于制造酶促生物传感器，并研究了其以磷酸盐缓冲液为电解质的电化学活性。通过催化化学气相分解（CCVD）合成了MWNT，并使用一种简单的溶胶-凝胶法来装饰MWNT上的结晶ZnO纳米粒子。循环伏安法和计时电流法用于研究和优化所得酶促和非酶促ZnO / MWNT生物传感器的电化学性能。非酶Nafion / ZnO / MWNT / GC电极在700 nM至31 mM范围内显示线性，检测极限为500 nM。使用Nafion / GOD / ZnO / MWNT在玻璃碳电极（GCE）上制造的类似酶生物传感器显示的线性范围为1μM至22 mM。非酶Nafion / ZnO / MWNT / GC的这种优异性能是由于高表面积，ZnO / MWNT的良好电子转移速率以及NaOH溶液中ZnO的高电化学催化活性。

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