期刊
JOURNAL OF RAMAN SPECTROSCOPY
卷 43, 期 6, 页码 761-768出版社
WILEY-BLACKWELL
DOI: 10.1002/jrs.3089
关键词
electro-spinning; V2O5 nanofibres; Raman spectroscopy; photoluminescence; oxygen vacancies
类别
Composite vanadium oxide (VOx)-based fibres were synthesised by the electro-spinning method combined with conventional solgel processing using polyvinyl acetate (PVAc) as a polymeric binder and vanadium oxytriisopropoxide as a vanadium oxide precursor. The microstructure and composition of as-spun and calcined (300-500 degrees C) VOxPVAc fibres were systematically investigated by scanning electron microscopy, thermogravimetry, reflectance infrared Fourier transform, micro-Raman spectroscopy and photoluminescence in view of their possible use in gas sensor fabrication. The comparative discussion of the characterization results indicates that V2O5PVAc fibres are obtained. Calcination gradually removes PVAc and promotes structural rearrangement with consequent fibre-morphology changes. With increasing calcination temperature, the crystallinity degree of V2O5 improves and a more oxygen-deficient substoichiometric surface layer forms. Calcination at 400 degrees C preserves the fibre integrity. Indeed, fibres calcined at this temperature appear as the most suitable ones for use as the active layer in gas-sensing devices. Copyright (C) 2011 John Wiley & Sons, Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据