In recent years, the increasing trend of people suffering from diabetes has caused an increase in health concerns. Therefore, the development of systems A diagnosis with high accuracy and sensitivity is very important. In order to overcome the limitations of detection systems based on enzymes, Non-enzymatic biosensor based on transition metals have been developed. On the other hand, among the diagnostic approaches, the photoelectrochemical method due to its hight sensitivity , it has been considered as a promising method in the last two decades. Among transition metal oxides, materials based on copper oxide are due Features such as the abundance, cost-effectiveness of bone, as well as suitable optical performance are used in the process of direct oxidation of glucose. Takes. Also, the use of porous substrates will be a good candidate for loading catalytic nanoparticles. in this research; heterojunction between titanium oxide nanotubes (TiO2) and copper oxide nanoparticles (Cu2O) was created for the photoelectrochemical detection of glucose. At First, titanium oxide nanotubes were prepared by anodizing process; so that the average inner diameter of nanotubes and their average length are respectively nm 17 ± 76 and 750 ± 0.1 nm were obtained. Then deposition of copper oxide nanoparticles by pulsed electrochemical deposition process on nanotubes Titanium oxide was performed. Photoelectrochemical performance of the mentioned structure by loading different amounts of copper oxide nanoparticles by voltammetry test Wheels were eva‎luated. The results showed that the photoelectrochemical property of the electrode has improved compared to titanium oxide nanotubes. In the following, the optimal sample from the point of view of different detection characteristics such as field emission electron microscope (FESEM), X-ray diffraction test (XRD), ultraviolet-visible optical spectroscopy (DRS) and Schottky matte test were eva‎luated. Optical spectroscopy results showed a gap The banding of titanium oxide nanotubes after surface modification with copper oxide nanoparticles is associated with a decrease of 7.8%. Also performance The photoelectrochemical of this structure was carried out using chronoamperometry test in the presence of different amounts of glucose. The results showed the biosensor has a high sensitivity, 17.011 μA.mM-1.cm-2, a wide linear range of 1-10 mM, and a detection limit of 37 μM. Also, the stability of the biosensor was eva‎luated that after 900 seconds, the light current response was 98.4% of the state He had kept the original.

مهران نحوي

عليرضا علافچيان , عباس بهرامي