Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1477588 | Journal of the European Ceramic Society | 2008 | 4 Pages |
Abstract
Porous glass-ceramics with a skeleton of γ-Ti(HPO4)2·2H2O 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 micro-sized (1-2 μm) 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 °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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yusuke Daiko, Hiroki Yajima, Toshihiro Kasuga,