Crystallographically oriented Mesoporous WO3 films:: Synthesis, characterization, and applications

被引：1015

作者：

Santato, C ^{[1
]}

Odziemkowski, M ^{[1
]}

Ulmann, M ^{[1
]}

Augustynski, J ^{[1
]}

机构：

[1] Univ Geneva, Dept Chem, CH-1211 Geneva 4, Switzerland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2001年 / 123卷 / 43期

关键词：

D O I：

10.1021/ja011315x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Mesoporous semiconducting films consisting of preferentially orientated monoclinic-phase nanocrystals of tungsten trioxide have been prepared using a novel version of the sol-gel method. Transformations undergone by a colloidal solution of tungstic acid, stabilized by an organic additive such as poly(ethylene glycol) (PEG) 300, as a function of the annealing temperature have been followed by means of a confocal Raman microscope. The shape and Size of WO3 nanoparticles, the porosity, and the properties of the films depend critically on preparation parameters, such as the tungstic acid/PEG ratio, the PEG chain length, and the annealing conditions. Well-crystallized WO3 films combine excellent photoresponse to the blue region of the solar spectrum, up to 500 nm, with good transparency at wavelengths larger than 550 nm. Particular applications of these nanocrystalline WO3 films include photoelectrochemical and electrochromic devices.

引用

页码：10639 / 10649

页数：11

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