Regional Symposium on Innovation in science and technology

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Investigation of the effect of electrolyte type in the anodizing process of titanium

Authors :

Nazanin Yazdanparast¹ ّFaezeh Darvishian Haghighi²

1- دانشگاه فردوسی مشهد 2- دانشگاه فردوسی مشهد

Keywords :

Nanotube،Titanium Dioxide،fluoride ions،Electrochemical Anodization

Abstract :

The leading project aims to form a TiO₂ oxide layer on a Ti (grade 2) substrate by electrochemical anodization and investigate the morphology of titanium dioxide. TiO₂ has attractive properties such as increased ion exchange capacity, non-toxicity, environmental safety, photocatalytic properties, and a high surface area to volume ratio. In this project, we investigate the morphology of TiO₂ formed in two types of organic and aqueous electrolytes. The titanium metal present in the substrate acts as a titanium source and, by creating a closed interface, fulfills the need for the presence of one of these electrodes. This titanium process allows TiO₂ with different morphologies to be formed in situ on the surface of the titanium metal. Ultimately, a porous structure with very strong adhesion to the substrate and a regular crystalline structure is formed. Titanium dioxide formation was performed by anodizing pure titanium in a standard two-electrode bath consisting of an organic electrolyte containing fluoride ions and an acidic aqueous electrolyte bath to investigate the effect of electrolyte on titania morphology. The results showed that acidic electrolytes cause the formation of titania with dense hardness. In the sample anodized with fluoride-containing electrolyte, we see the formation of titanium dioxide nanotubes due to the mechanism of action of fluoride ions.

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