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First-order phase transition in nanotubular titanium dioxide

Russian version

DOI: 10.21883/PSS.2022.14.54324.17s

Sushnikova A.A.^1,2, Valeeva A. A. ^2,3, Dorosheva I.B.^1,2, Rempel A.A. ^1,2

¹Institute of Metallurgy of Ural Branch of the Russian Academy of Science, Ekaterinburg, Russia
²Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
³Institute of Solid State Chemistry, Russian Academy of Sciences, Ural Branch, Yekaterinburg, Russia

Email: sushnikova.ann@gmail.com, anibla_v@mail.ru, i.b.dorosheva@urfu.ru, rempel.imet@mail.ru

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Abstract
References
Статистика просмотров

Titanium dioxide (TiO₂) nanotubes array with the length of 16 μm and the outer diameter of 100 nm were synthesized by anodic oxidation of titanium foil in an electrolyte solution containing a fluorine-containing solution of ethylene glycol. The selected synthesis conditions make it possible to separate the nanotubular array from the titanium foil and study it as a homogeneous functional material. The performed scanning electron microscopy study and Brunauer-Emmett-Teller analysis allowed to get data on the morphology of the samples. X-ray diffraction, thermogravimetric, and differential scanning calorimetry analysis made it possible to determine the temperature of the phase transition of the amorphous state into crystalline anatase (sp.gr. I4/amd). Observed phase transition of first order takes place at temperature about 350^oC. Keywords: nanotubular titanium dioxide films, anodic oxidation, phase transition, anatase, TG, DSC.

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