TiO2基底对MoO3/TiO2复合薄膜电致变色性能的影响

Effect of TiO2 substrate on electrochromic properties of MoO3/TiO2 composite films

采用水热法首先在导电玻璃上制备TiO2纳米线,随后电沉积涂覆MoO3薄膜,成功制备MoO3/TiO2复合薄膜。利用电化学测试与光谱测试,得到MoO3/TiO2复合薄膜的扩散系数、着色/退色的响应时间、光密度、电致变色可逆性和着色效率等参数,研究不同水热生长时长TiO2纳米线基底对MoO3/TiO2复合薄膜的电致变色性能的影响。结果表明:水热生长6h TiO2纳米线的MoO3/TiO2复合薄膜具有最佳的电致变色性能,扩散系数为2.86×10^-12 cm^2·s^-1,可逆性值为60.88%,光密度为0.41,着色效率达到124.49 cm^2·C^-1,着色和退色响应时间分别为13.53 s和12.65 s。

TiO2 nanowires were prepared on fluorine-doped tin oxide(FTO)glass by hydrothermal synthesis,and then the MoO3/TiO2 composite films were prepared by electrodepositing MoO3 films onto TiO2 nanowire arrays.The parameters such as diffusion coefficient(D),the responding time of colored and bleached,optical density(ΔOD),electrochromic reversibility and coloration efficiency of MoO3/TiO2 composite film were obtained by electrochromical measurement technologies and spectrum tests.The effect of TiO2 nanowire substrates with different hydrothermal growth time on the electrochromic properties of MoO3/TiO2 composite films was studied.The results show that the MoO3/TiO2 composite films with 6 hours of hydrothermal growth TiO2 nanowires have the best electrochromic properties.The diffusion coefficient is 2.86×10^-12 cm^2·s^-1,the cyclic reversibility is 60.88%,the optical density is 0.41,the coloring efficiency reaches 124.49 cm^2·C^-1,and its responding time of colored and bleached is 13.53 s and 12.65 s.