WO_(3)/PANI核壳结构反蛋白石薄膜的电致变色性能  

Electrochromic Property of the WO_(3)/PANI Core-Shell Inverse Opal Structure Film

作　　者：江莉琪 危科 王浪 肖厚地 杨九香 胡执一 刘婧[1] 李昱[1] 吕明云[2] 苏宝连[1] JIANG Liqi;WEI Ke;WANG Lang;XIAO Houdi;YANG Jiuxiang;HU Zhiyi;LIU Jing;LI Yu;LYU Mingyun;SU Baolian(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《高等学校化学学报》2021年第9期2996-3004,共9页Chemical Journal of Chinese Universities

基　　金：国家重点研发计划项目(批准号:2016YFA0202602);国家自然科学基金(批准号:U1663225)资助.

摘　　要：采用连续离子层吸附法在反蛋白石结构三氧化钨(IO-WO_(3))薄膜表面引入导电聚合物聚苯胺(PANI)层,制备了独特的WO_(3)/PANI核壳结构反蛋白石薄膜(IO-WO_(3)/PANI).探究了IO-WO_(3)/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-WO_(3)/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-WO_(3)薄膜相比,IO-WO_(3)/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 cm^(2)/C.电致变色性能的改善主要归因于WO_(3)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-WO_(3)/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.A conductive polymer polyaniline(PANI)layer was introduced on the surface of the inverse opal structure tungsten trioxide(IO-WO_(3))film by the successive ionic layer adsorption and reaction,then a unique core-shell inverse opal structure WO_(3)/PANI(IO-WO_(3)/PANI)film was fabricated.The morphology,composition,and electrochemical behavior of the IO-WO_(3)/PANI film were studied and compared with the IO-WO_(3)film.When the potential scan ranged from−0.6 V to 1.0 V,the IO-WO_(3)/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-WO_(3)film,the electrochromic performance of the IO-WO_(3)/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 cm^(2)/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-WO_(3)/PANI core-shell inverse opal film is a potential multicolor electrochromic material and has broad application prospects in the future.

关 键 词：氧化钨 多色电致变色 反蛋白石结构 有机/无机杂化材料 

分 类 号：O614[理学—无机化学] O631[理学—化学]