Preparation of porous titanium phosphate glass-ceramics for NH3 gas adsorption with self-cleaning ability

被引：29

作者：

Daiko, Yusuke ^{[1
]}

Yajima, Hiroki ^{[1
]}

Kasuga, Toshihiro ^{[1
]}

机构：

[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 01期

关键词：

glass-ceramic; sol-gel processes; TiO2;

D O I：

10.1016/j.jeurceramsoc.2007.05.016

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous glass-ceramics with a skeleton of gamma-Ti(HPO4)(2)center dot 2H(2)O crystals are derived from glasses in the Li2O-CaO-TiO2-P2O5 system by utilizing spinodal-type phase separation, crystallization and subsequent acid treatment of the resulting glass-ceramics. The glass-ceramics have both microsized (1-2 mu m) and nano-sized pores (5-30 nm), and they adsorb polar molecules. In the present work, porous TiO2 layers of 200-500 nm thickness were successfully deposited on the surfaces of the glass-ceramics by an infiltration of Ti(OCH(CH3)(2))(4) and water vapor treatment at 100 degrees C under 100% relative humidity. X-ray diffractometry and laser Raman spectroscopy revealed the formation of anatase crystals. The resulting anatase-modified porous glass-ceramics show high activities for NH3 adsorption as well as for photodecomposition of the adsorbed NH3 molecules. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：267 / 270

页数：4

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