Synthesis and characterization of tungsten trioxide powders prepared from tungstic acids

被引：86

作者：

Nogueira, HIS ^{[1
]}

Cavaleiro, AMV ^{[1
]}

Rocha, J ^{[1
]}

Trindade, T ^{[1
]}

de Jesus, JDP ^{[1
]}

机构：

[1] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro, Portugal

来源：

MATERIALS RESEARCH BULLETIN | 2004年 / 39卷 / 4-5期

关键词：

oxides; chemical synthesis; Fourier transform infrared spectroscopy; scanning electron microscopy;

D O I：

10.1016/j.materresbull.2003.11.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WO3 powders were prepared by the thermal decomposition of tungstic acids (WO3.nH(2)O, n = 1/3, 1, 2). The tungstic acids were synthesized from WO42- aqueous solutions under a variety of conditions of pH, temperature and W(VI) concentrations. The thermal decomposition of the tungstic acids into WO3 was analysed by TG and DSC methods. Nano-sized WO3 powders with different morphological characteristics were obtained by thermal treatment of the tungstic acids at 500 degreesC in air atmosphere. The morphologies Of WO3 powders were characterised by scanning electron microscopy and infrared absorption spectroscopy. Patterns of infrared spectra were related with distinct powder morphologies. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：683 / 693

页数：11

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