WO_3/TiO_2复合薄膜的制备及其电致变色性能

Preparation and electrochromic properties of WO_3/TiO_2 composite films

使用水热法在掺氟SnO_2涂覆的导电玻璃(FTO)基板上生长TiO_2纳米线,随后在TiO_2纳米线上采用水热法生长WO_3纳米线,制备出WO_3/TiO_2复合薄膜。通过循环伏安法(CV)、计时电流法(CA)、计时电量法(CC)等电化学测试技术研究了WO_3/TiO_2复合薄膜的电致变色性能;采用紫外分光光度计对薄膜的着色﹑漂白状态的响应时间进行测试。通过以上测试,计算得到了薄膜的循环稳定性﹑光调制﹑着色效率和切换时间(Y和X)等参数。结果显示WO_3/TiO_2复合薄膜的电致变色性明显提高,其中WO_3/TiO_2复合薄膜可逆性增加了6%,着色效率提高了40.96cm^2/C。

TiO2 nanowires were prepared on F-dopet tin oxide(FTO)by hydrothermal method.Then WO3 nanowires were prepared on TiO2 nanowires by hydrothermal method to obtain WO3/TiO2 composite films.The electrochromic properties of WO3/TiO2 composite films were studied by cyclic voltammetry(CV),chronoamperometry(CA)and chronocharging(CC).The response time of the coloring and bleaching state of the film was tested by UV spectrophotometer.Through the above tests,the parameters such as cycle stability,light modulation,coloring efficiency and switching time(Y and X)were calculated.The results show that the electrochromic properties of WO3/TiO2 composite films are obviously improved.The reversibility of WO3/TiO2 composite films increases by 6%,and the coloring efficiency increases by 40.96 cm^2/C.