CNTs-Pt甲醛传感器和CNTs-Au葡萄糖传感器的研究

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-A...

CNTs-Pt Formaldehyde Sensor and CNTs-Au Glucose Sensor

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.