Scholarlink

<p>Study investigates the electrochromic properties of titanium dioxide (TiO<sub>2</sub>) films synthesized by anodic oxidation of titanium in alkali nitrate melts with potassium fluoride additives. The optimal synthesis parameters to achieve a high contrast ratio (K = 7–8) were established: potentiostatic mode, temperature of 625 ± 10&#xa0;K, voltage of 20 ± 5&#xa0;V, process duration of 5–12&#xa0;min, and a KF concentration of 0.01–0.04&#xa0;mol/kg in a NaNO<sub>3</sub>–KNO<sub>3</sub> eutectic melt. A comprehensive characterization of the films was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). The results confirm the formation of a nanocrystalline mixed-phase (anatase and rutile) TiO<sub>2</sub> film with a thickness of ~ 578&#xa0;nm. EDX analysis revealed the incorporation of fluorine into the oxide matrix, which promotes the formation of oxygen vacancies and enhances ionic conductivity. The nanostructured morphology and optimal defect density are identified as key factors contributing to the superior electrochromic performance. The findings highlight the strong potential of the developed TiO<sub>2</sub> electrodes for application in electrochromic devices, such as smart windows and information displays.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Electrochromic properties and contrast ratio optimization of titanium oxide films synthesized in nitrate melts

  • 期刊论文

  • 发表日期：

    2025年10月31日

查看全文
  • Mikhail P. Kuz’min,
  • Marina Yu. Kuz’mina

摘要

Study investigates the electrochromic properties of titanium dioxide (TiO2) films synthesized by anodic oxidation of titanium in alkali nitrate melts with potassium fluoride additives. The optimal synthesis parameters to achieve a high contrast ratio (K = 7–8) were established: potentiostatic mode, temperature of 625 ± 10 K, voltage of 20 ± 5 V, process duration of 5–12 min, and a KF concentration of 0.01–0.04 mol/kg in a NaNO3–KNO3 eutectic melt. A comprehensive characterization of the films was performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). The results confirm the formation of a nanocrystalline mixed-phase (anatase and rutile) TiO2 film with a thickness of ~ 578 nm. EDX analysis revealed the incorporation of fluorine into the oxide matrix, which promotes the formation of oxygen vacancies and enhances ionic conductivity. The nanostructured morphology and optimal defect density are identified as key factors contributing to the superior electrochromic performance. The findings highlight the strong potential of the developed TiO2 electrodes for application in electrochromic devices, such as smart windows and information displays.