نوع مقاله : مقاله پژوهشی
چکیده تصویری
موضوعات
عنوان مقاله English
نویسندگان English
In this paper, to better understand the synthesis of titanium dioxide nanotubes using the electrochemical anodization method, electrolyte solutions based on dihydroxy alcohols of ethylene glycol and diethylene glycol in the presence of sodium fluoride, were evaluated. In this regard, two different electrolyte solutions were used for the oxidation of the titanium foil anode, in which the volume percentage ratio of water to organic solvent was 10:90, and the amount of salt was set at 0.3% by weight. All anodizations for synthesizing nanotubes were carried out at room temperature for 3 hours under a constant applied voltage of 60 volts. According to these studies, we observed that the growth rate of titania nanotubes by solutions based on diethylene glycol was slow, unlike ethylene glycol, and the formed oxide layers had a small thickness. While in the solutions based on ethylene glycol in the presence of sodium fluoride, a regular array of nanotubes with a length of about 4 micrometers were formed, respectively. It is interesting to note that these electrolyte solutions showed a lower viscosity than the electrolyte solutions based on diethylene glycol, which especially affected the anodizing process. In addition, we conducted a detailed study on the structural arrangement of electrolyte solution components near solid surfaces to reveal the factors governing the difference in the distribution of ionic species in solution using molecular dynamics simulations.
کلیدواژهها English
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