FTIR and absorption edge studies on tungsten oxide based precursor materials synthesized by sol-gel technique
FTIR and absorption edge studies on tungsten oxide based precursor materials synthesized by sol-gel technique
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DOI：
10.1016/s0022-3093(02)01134-1
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发表时间：
2002-08-01
影响因子：
3.5
通讯作者：
Agnihotry, SA
中科院分区：
文献类型：
--
作者：
Sharma, N;Deepa, M;Agnihotry, SA
采用溶胶-凝胶法合成了三种制备氧化钨基电致变色薄膜的前驱体材料。离子交换法制备的钨酸前驱体(ITA)具有强烈的快速聚合倾向。过氧化氢和/或醋酸的加入抑制了凝胶过程，并获得了具有低聚合度和高化学稳定性的乙醇可溶前驱物(AIPTA)。另一种具有类似理想特性的前驱体材料APTA是由金属钨粉末与过氧化氢和醋酸的混合物直接反应生成的。用FTIR和吸收边研究对这些材料进行了表征，并比较了它们的聚合度和各种官能团与钨金属离子的缔合方式。(C)2002 Elsevier Science B.V.保留所有权利。
The sol-gel technique has been employed for synthesizing three precursor materials for the deposition of tungsten oxide based electrochromic films. The ion-exchange route yields tungstic acid precursor (ITA) which has a strong tendency to polymerize rapidly. Addition of hydrogen peroxide and/or acetic acid suppresses the gelation process and an ethanol soluble precursor material (AIPTA) possessing a low degree of polymerization and high chemical stability is obtained. Another precursor material APTA endowed with similar desirable characteristics is produced from direct reaction between tungsten metal powder and a mixture of hydrogen peroxide and acetic acid. These materials were characterized by FTIR and absorption edge studies and compared in terms of their degree of polymerization and modes of association of various functionalities with the tungsten metal ion. (C) 2002 Elsevier Science B.V. All rights reserved.