钨酸
三氧化钨
纳米晶材料
电致变色
单斜晶系
乙二醇
退火(玻璃)
介孔材料
化学
化学工程
拉曼光谱
PEG比率
纳米晶
纳米颗粒
纳米技术
钨
材料科学
结晶学
有机化学
光学
晶体结构
物理化学
经济
催化作用
复合材料
工程类
物理
电极
财务
作者
Clara Santato,Marek Odziemkowski,M. Ulmann,Jan Augustyński
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI