EFFECT OF CHANGING THE WATER COMPOSITION IN THE ELECTROLYTE ON THE MORPHOLOGY OF TiO2 NANOTUBE

The effect of varying H2O and F-concentration in electrolytes on TiO2 morphology has been extensively studied. The effect of fluoride content during anodization has little effect on nanotube diameter and oxide layer growth [1], but leads to tube length, its growth rate, and higher order [2-3]. In contrast the amount of water in the anodizing cell significantly increases the pore diameter, but reduces the oxide expansion coefficient, pore length, growth rate and efficiency. Electrochemical impedance spectroscopy (EIS) was used to monitor the growth of the barrier layer formed during the anodization of TiO2 in an electrolyte containing F- ions, which also allowed us to study the effects of the concentration of F- ions in the solution and the pH medium of the electrolyte. [4-5].