壳聚糖辅助制备WO_3薄膜材料及其电致变色性能  

Chitosan-assisted WO_3 Ultrathin Film and Electrochromic Performance

作　　者：刘树萍[1,2] 刘益春[2] 王薇[1] 

机构地区：[1]哈尔滨商业大学旅游烹饪学院,化学中心,哈尔滨150076 [2]东北师范大学物理学院、紫外光发射材料与技术教育部重点实验室,长春130024

出　　处：《高等学校化学学报》2015年第6期1202-1207,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21301041,31201376);哈尔滨商业大学博士科研启动项目(批准号:12DW030)资助~~

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.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.

关 键 词：三氧化钨(WO3) 壳聚糖 层层自组装 电致变色性能 CS/WO3纳米复合薄膜 

分 类 号：O631[理学—高分子化学]