CNTs-Pt甲醛传感器和CNTs-Au葡萄糖传感器的研究

摘要/Abstract

摘要： 采用化学气相沉积(CVD)技术,通过CH₄裂解法制备了碳纳米管(CNTs)。使用旋转圆盘处理机(SDP)自组装技术,将纳米Pt和纳米Au电沉积在CNTs上对其进行修饰。随后,通过将铂粒子电化学沉积在CNTs修饰的玻碳电极(GCE)上以及利用静电效应将葡萄糖氧化酶固定在金电极上,制备了CNTs-Pt/GCE和CNTs-Au修饰电极。最后,使用循环伏安法(CV)研究了葡萄糖在CNTs-Au和甲醛在CNTs-Pt/GCE上的电化学性能。结果表明,由于纳米金粒子与CNTs可以有效地增加电极的比表面积提高其电子转移速率,因此,CNTs-Au生物传感器具有良好的重复性、稳定性和快速的葡萄糖检测响应,可用于临床血清葡萄糖浓度的检测。另外,由于Pt的高度分散和CNTs与Pt的协同作用增强了电极表面的活性位点,使得CNTs-Pt/GCE在甲醛的检测过程中展现出了较高的灵敏度和良好的重现性。

关键词: 传感器, 旋转圆盘处理机, CNTs-Au, CNTs-Pt, 葡萄糖, 甲醛

Abstract: Carbon nanotubes (CNTs) were prepared by CH₄ pyrolysis using chemical vapor deposition (CVD) technique. And then spinning disc processor (SDP) self-assembly technique was used to modify the CNTs with nano Pt and nano Au through electrodeposition processes. Subsequently, CNTs-Pt/GCE electrode and CNTs-Au modified electrode were prepared by electrochemical deposition of platinum particles on CNTs-modified glassy carbon electrode (GCE) and immobilization of glucose oxidase on Au electrode via electrostatic effect, respectively. Finally, the electrochemical behavior of glucose on CNTs-Au electrode and formaldehyde on CNTs-Pt/GCE electrode was investigated by cyclic voltammetry (CV) method in a three-electrode system. The electrochemical test results show that Au nanoparticles and CNTs could effectively increase the specific surface area of the electrode and increase its electron transfer rate. Therefore, CNTs-Au biosensor has good repeatability, stability and rapid glucose detection response, which could be used for the detection of serum glucose concentration in clinical practice. In addition, due to the high dispersion of Pt nano particles and the synergistic effect of CNTs and Pt nano particles, the active sites on the electrode surface are enhanced, so the CNTs-Pt/GCE electrode exhibits high sensitivity and good reproducibility in the detection process of formaldehyde. The above results shows that this work has a very good potential for practical application.

Key words: sensor, spinning disc processor, CNTs-Au, CNTs-Pt, glucose, formaldehyde

中图分类号:

TP212
O657.1

张循海, 王超会, 林蔚, 李晓生, 张永. CNTs-Pt甲醛传感器和CNTs-Au葡萄糖传感器的研究[J]. 人工晶体学报, 2021, 50(2): 368-374.

ZHANG Xunhai, WANG Chaohui, LIN Wei, LI Xiaosheng, ZHANG Yong. CNTs-Pt Formaldehyde Sensor and CNTs-Au Glucose Sensor[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(2): 368-374.

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