文献类型：期刊文献

中文题名：WO_(3)/TiO_(2)纳米晶的火焰合成及其电致变色性能研究

英文题名：Flame synthesis and electrochromic properties of WO_(3)/TiO_(2) nanocrystals

作者：顾莉[1];何小乐[1];孟钰枫[1];胡彦杰[1]

机构：[1]华东理工大学超细材料教育部重点实验室,上海市环境友好材料专业技术服务平台,材料科学与工程学院,上海200237

年份：2024

卷号：55

期号：9

起止页码：9007

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金面上项目(22378128,22108079)。

语种：中文

中文关键词：WO_(3)/TiO_(2);电致变色;Ti掺杂;退火

外文关键词：WO_(3)/TiO_(2);electrochromic;Ti doping;annealing

摘要：通过自行设计的火焰喷雾燃烧系统合成纯WO_(3)和Ti掺杂的WO_(3)/TiO_(2)纳米晶,采用旋涂法进行薄膜制备,并通过多种表征手段研究Ti掺杂量和退火温度对薄膜电致变色的影响。研究表明,Ti掺杂为薄膜提供更多的活性位点,增大离子迁移速率和电导率,WTi-6薄膜在633 nm处的最大光学调制为67.11%,着色效率也为纯WO_(3)薄膜的1.7倍。同时,400℃的退火处理增强了WTi-6薄膜和导电基材的附着力,薄膜的电化学性能得到提升,Li+在薄膜上嵌入/脱出的可逆性增强。相应地,退火后WTi-6薄膜获得较高光学调制范围(76.05%),响应速度加快,在着色时间和褪色时间也分别由未退火的5.7、10.4 s缩短为5.5和8.2 s,着色效率提高至82.20 cm^(2)/C。因此,通过火焰喷雾燃烧进行Ti掺杂改性和退火工艺精进,提高了WO_(3)薄膜电致变色性能,拓展了WO_(3)纳米晶的制备工艺,具有良好的应用前景。
Pure WO_(3)and Ti doped WO_(3)/TiO_(2)nanocrystals were synthesized by a self-designed flame spray combustion system,and the thin films were prepared by spin-coating method.The impact of Ti doping amount and annealing temperature on the electrochromic properties of the films were investigated by various characterization methods.The results show that Ti doping provides more active sites and increases the ion migration rate and conductivity.The maximum optical modulation of WTi-6 film at 633 nm is 67.11%,and the coloring efficiency is 1.7 times that of pure WO_(3)film.Meanwhile,the annealing treatment at 400℃enhances the adhesion between the WTi-6 films and the conductive substrate,and the electrochemical properties of the films and the reversibility of Li+insertion/extraction on the films are improved.Correspondingly,the annealed WTi-6 films obtained a higher optical modulation range(76.05%),a faster response,and a shorter coloring time from the unannealed 5.7 s and 10.4 s to 5.5 s and 8.2 s,and the coloring efficiency is increased to 82.20 cm ^(2)/C.Therefore,Ti doping modification and annealing process refinement through flame spray combustion improves the electrochromic performance of WO_(3)thin films and expands the preparation process of WO_(3)nanocrystals,which has good application prospects.Therefore,Ti doping modification and annealing process refinement through flame spray combustion improves the electrochromic performance of WO_(3)thin films and expands the preparation process of WO_(3)nanocrystals,which has good application prospects.