WO3/PANI核壳结构反蛋白石薄膜的电致变色性能

采用连续离子层吸附法在反蛋白石结构三氧化钨(IO-WO₃)薄膜表面引入导电聚合物聚苯胺(PANI)层, 制备了独特的WO₃/PANI核壳结构反蛋白石薄膜(IO-WO₃/PANI). 探究了IO-WO₃/PANI薄膜的形貌、 组成和电化学行为. 结果表明, 当电位扫描范围为-0.6~1.0 V时, IO-WO₃/PANI复合膜在不同电压状态下会呈现出4种不同的颜色, 分别为蓝色(1.0 V)、 绿色(0.2 V)、 浅绿色(0 V)和蓝紫色(-0.6 V). 与IO-WO₃薄膜相比, IO-WO₃/PANI复合膜的电致变色性能显著提高, 其着色与退色响应时间分别为3.8和6.14 s, 变色效率(CE)值为201.1 cm²/C. 电致变色性能的改善主要归因于WO₃与PANI形成给体-受体体系和核壳反蛋白石等级孔结构, 使得离子快速扩散, 并为电荷转移反应提供更大的表面积. 研究结果表明, IO-WO₃/PANI核壳结构反蛋白石薄膜是一种潜在的多色电致变色材料, 具有广阔的应用前景.

Electrochromic Property of the WO3/PANI Core-Shell Inverse Opal Structure Film

A conductive polymer polyaniline（PANI） layer was introduced on the surface of the inverse opal structure tungsten trioxide（IO-WO₃） film by the successive ionic layer adsorption and reaction， then a unique core-shell inverse opal structure WO₃/PANI（IO-WO₃/PANI） film was fabricated. The morphology， composition， and electrochemical behavior of the IO-WO₃/PANI film were studied and compared with the IO-WO₃ film. When the potential scan ranged from -0.6 V to 1.0 V， the IO-WO₃/PANI composite film showed different colors under different voltage states， namely blue（1.0 V）， green（0.2 V）， light green（0 V） and blue-violet （-0.6 V）. Compared with the IO-WO₃ film， the electrochromic performance of the IO-WO₃/PANI film is signi-ficantly improved. The coloring and fading response times are 3.8 and 6.14 s， respectively， and the color change efficiency（CE） value is 201.1 cm²/C. The improvement of electrochromic performance is mainly attri- buted to the formation of the donor-acceptor system and the hierarchically porous structure in the core-shell inverse opal， which enable rapid ion diffusion and provide a larger surface area for charge transfer reactions. The results show that the IO-WO₃/PANI core-shell inverse opal film is a potential multicolor electrochromic material and has broad application prospects in the future.