UV absorption of titanium oxide based gels

被引：15

作者：

Bityurin, N

Znaidi, L

Marteau, P

Kanaev, A ^{[1
]}

机构：

[1] Univ Paris 13, Lab Ingn Mat & Hautes Press, CNRS, Inst Galilee, F-93430 Villetaneuse, France

[2] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 367卷 / 5-6期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0009-2614(02)01758-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A spectroscopic study of the gelation and aging of the titanium oxide based gels has been carried out. A careful analysis of measured spectra has shown a permanent growth of the UV absorption in the spectral range of hv greater than or equal to E-thr = 3.24 eV during all the period of observations. The absorption saturates at times much longer than the gelation time. The observed kinetics is discussed in terms of short oxo-polymer chains nucleation, formation of the primary gel, and gel mass increase under aging. Simple basic models relating the absorption growth to the accumulation of polymeric units successfully fit the experimental curve. The observations suggest using the UV absorption for control of the gel formation. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：690 / 696

页数：7

共 16 条

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