普鲁士蓝电致变色膜的制备及性质研究

Study on preparation and properties of prussian blue electrochromic film

采用简单电化学聚合法,通过对聚合电位和聚合时间进行优化选择,在ITO导电玻璃表面利用恒电位聚合法得到普鲁士蓝膜。然后,利用恒电位法对普鲁士蓝膜施加适宜时间的还原电位将其还原为普鲁士白膜。再对普鲁士白膜施加适宜时间的氧化电位,又可得到普鲁士蓝膜。分别记录施加不同电位后普鲁士蓝膜及普鲁士白膜的颜色变化,并利用紫外-可见分光光度计、循环伏安法对合成的普鲁士蓝膜及普鲁士白膜的紫外吸收性质及电化学性质进行表征。结果表明:在电位控制下,普鲁士蓝膜与普鲁士白膜表现出薄膜颜色、电化学性质以及紫外吸收性质的可逆性变化。

Prussian blue film was obtained on the surface of ITO conductive glass by constant potential polymerization by simple electrochemical polymerization and optimization of polymerization potential and polymerization time. Then, the prussian blue film was reduced to prussian white membrane by potentiostatic method. Prussian blue membrane can be obtained by applying oxidation potential of suitable time to prussian white membrane. The color changes of prussian blue film and prussian white film were recorded after different potentials were applied, and the UV absorption properties and electrical properties of the synthesized prussian blue and prussian white film were studied by UV-vis spectrophotometer and cyclic voltammetric. The chemical properties are characterized. The results show that under the control of electric potential, the prussian blue film and prussian white film show the reversible change of the color, the electrochemical property and the ultraviolet absorption property of the film.