溶胶-凝胶-热解法制备介孔WO_3薄膜及其电致变色性能研究  

Study on the preparation and electrochromic performance of the mesoporous WO_3 film by the sol-gel-pyrolysis method

作　　者：高玲[1] 尚福亮[2] 杨海涛[1] 韩海涛[2] 

机构地区：[1]深圳大学材料学院深圳市特种功能材料重点实验室,广东深圳518060 [2]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《功能材料》2007年第1期75-77,80,共4页Journal of Functional Materials

基　　金：国家基金重大国际合作子项资助项目(50220160657);教育部科学技术研究重点资助项目(02049)

摘　　要：采用溶胶-凝胶-热解工艺,以PEG-400为结构导向模板剂,合成出介孔WO3薄膜,通过XRD、SEM、BET等对其晶相组成,显微结构,比表面积和孔径分布等进行了测试,结果表明所制备的介孔WO3薄膜材料为立方晶相,其平均孔径在6.37nm,比表面积高达20.69m2/g;电化学循环伏安和光谱测试分析表明该薄膜具有良好的电致变色性能,对可见光具有很好的调制功能,平均最大透过率调制幅度可达69.96%。The mesoporous WO3 film was prepared by the sol-gel-pyrolysis method with the PEG-400 as the structure-directing agent. The crystalline phase,microstructure,special surface area and pore size distribution of the WO3 film were tested with the XRD,SEM and N2 sorption techniques,respectively. It is found the WO3 film belongs to the cubic system and its average pore size is 6.37nm as well as the special surface is 20.69m^2/g. The test results by the electrochemical cyclic voltammetry and UV-Vis spectrum showed that the mesoporous WO3 film has a good electrochromic performace. The film possesses excellent modulation to the visible light and the maximal average transmittance modulation scope reached 69.96%.

关 键 词：WO3 薄膜 介孔 电致变色 

分 类 号：O648[理学—物理化学] TB34[理学—化学]