Keggin型多金属氧酸盐/TiO_2纳米线复合膜的制备及电致变色性能研究  

Preparation and electrochromic property of Keggin-type polyoxometalate/TiO_2 nanowires nanocomposite film

作　　者：丰慧 曲小姝[1] 刘树萍[2] 杨艳艳[1] 公庆琳 杨晓东 FENG Hui;QU Xiao-shu;LIU Shu-ping;YANG Yan-yan;GONG Qing-lin;YANG Xiao-dong(School of Chemistry and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China;College of Tourism and Cuisine, Harbin University of Commerce, Harbin 150076 ,China)

机构地区：[1]吉林化工学院化学与制药工程学院,吉林吉林132022 [2]哈尔滨商业大学旅游与烹饪学院,黑龙江哈尔滨150076

出　　处：《东北师大学报（自然科学版）》2018年第2期93-96,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21301041);吉林省教育厅科学技术研究项目(2015431);吉林市科技计划项目(20156418);吉林化工学院科学技术研究项目(201343;2015031)

摘　　要：采用水热合成和层接层自组装技术,将Keggin型多金属氧酸盐K_3PW_(12)O_(40)(PW_(12))和TiO_2纳米线制备成复合膜材料.利用紫外-可见吸收光谱和扫描电镜、循环伏安等手段对复合膜材料的形貌和电化学性能进行了表征.采用电化学和紫外-可见吸收光谱联机技术研究了复合材料的电致变色性能,并将其与单纯PW12薄膜进行了比较.结果表明:复合膜表现出改进的电致变色性能,光反差达到5.3%;着色和褪色时间分别为2.87和1.13s,复合膜稳定性良好.This paper shows a nanocomposite film of Keggin-type polyoxometalate K3PW12O40（PW12）and TiO2 nanowire arrays by combining hydrothermal and Layer-by-Layer（LbL）assembly methods.The morphology and electrochemical properties of the composite films were characterized by UV-Vis absorption spectroscopy,scanning electron microscopy（SEM） and cyclic voltammetry.The electrochromic properties were examined by electrochemical and UV-vis technique and compared with the PW12 and TiO2 composite film as well as individual PW12 structures.The composite film exhibits improved EC properties with high optical contrast of 5.3%,fast switching times（2.87 sfor coloration and 1.13 sfor bleaching）and good stability.Obviously,the composite film based on Keggin-type polyoxometalate and TiO2 nanowire displays enhanced electrochromic performance.

关 键 词：电致变色 多金属氧酸盐 TiO2纳米线 纳米复合材料 

分 类 号：O611[理学—无机化学]