Photochromism and size effect of WO3 and WO3-TiO2 aqueous sol

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	Photochromism and size effect of WO3 and WO3-TiO2 aqueous sol
	He, YP ; Wu, ZY ; Fu, LM ; Li, CR ; Miao, YM ; Cao, L ; Fan, HM ; Zou, BS
刊名	CHEMISTRY OF MATERIALS
	2003
卷号	15 期号:21 页码:4039
关键词	THIN-FILMS TUNGSTEN-OXIDE VISIBLE-LIGHT TIO2 ABSORPTION
ISSN号	0897-4756
通讯作者	Zou, BS (reprint author), Chinese Acad Sci, Inst Phys, Nanoscale Phys & Device Lab, POB 603, Beijing 100080, Peoples R China.
中文摘要	The chromism of tungsten oxides has been investigated for a long time because of its academic and application importance. In this article the photochromism and its dynamics for a WO3 aqueous sol and WO3-TiO2 mixed sols are studied in detail. The chromic performance of the WO3 aqueous sol is improved significantly by adding TiO2 aqueous sol, and shows a clear size effect. The intrinsic absorption peak at around 777 run from W5+ in WO3 nanocluster, which generally appears at around 1000 nm in a WO3 film, shifts with cluster size because of the quantum confinement effect of delocalized carriers in WO3 nanoclusters. Besides the 777 nm band from W5+ in WO3, a new extrinsic 640 nm band, due to the transient formation of WOClx species in a WO3 sol in the presence of Cl- and TiO2 nanoclusters, appears after adding TiO2 sol. These results are helpful to the understanding of the chromism of tungsten oxides.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50900]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	He, YP,Wu, ZY,Fu, LM,et al. Photochromism and size effect of WO3 and WO3-TiO2 aqueous sol[J]. CHEMISTRY OF MATERIALS,2003,15(21):4039.
APA	He, YP.,Wu, ZY.,Fu, LM.,Li, CR.,Miao, YM.,...&Zou, BS.(2003).Photochromism and size effect of WO3 and WO3-TiO2 aqueous sol.CHEMISTRY OF MATERIALS,15(21),4039.
MLA	He, YP,et al."Photochromism and size effect of WO3 and WO3-TiO2 aqueous sol".CHEMISTRY OF MATERIALS 15.21(2003):4039.