中文摘要：

以壳聚糖（CS）为辅助材料,利用层层自组装方法（LbL）制备了WO3复合薄膜材料（CS/WO3）.采用紫外-可见吸收光谱（UV-Vis）、扫描电子显微镜（SEM）和循环伏安扫描（CV）等手段对CS/WO3纳米复合材料的形貌和电化学性能进行了表征.利用电化学和UV-Vis联机技术研究了复合材料的电致变色性能.结果表明,该复合材料呈现出从无色到蓝色的颜色调变,其光反差可达48.0%,着色效率为58.5cm2/C,着色与褪色时间分别为9.5和1.8s.

英文摘要：

A nanocomposite material consisting of WO3 and chitosan （CS） was fabricated by layer-by-layer （LbL） method in which CS was used as the additional component. The morphology and electrochemical behavior of the composite film were investigated by UV-Vis spectra, scanning electron microscopy（SEM） and cyclic voltammograms （CV）. The electrochromic properties of the film were performed by in situ UV-Vis spec- troscopy and electrochemical station. The results showed that the composite film was found to switch from colorless to deep blue, with the optical contrast of 48.0% and coloration efficiency of 58.5 cm2/C. Further- more, the switching times were 9.5 s for coloration and 1.8 s for bleaching. Obviously, chitosan plays an important role in enhancing electrochromic performance of WO3-based material.