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Structures and Photocatalytic Properties of Crystalline Titanium Oxide-Dispersed Nanoporous Glass–Ceramics

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A crystalline rutile titanium oxide (TiO2)-dispersed porous glass–ceramic was successfully prepared by the phase separation of aluminosilicate-based glass. A rutile TiO2 crystal was clearly observed after the heat treatment of 20TiO2·29SiO2·13Al2O3·28CaO·5MgO·2P2O5·2B2O3·1ZrO2 (mol%) glass at 900°C for 15 h. The glass–ceramic obtained was then treated with an acid solution (3 mol/dm3 nitric acid) to leach its soluble phases. The acid-treated sample became porous, and the glass–ceramic obtained had a large surface area of 74 m2/g. The porous glass–ceramic adsorbed methylene blue (MB) rapidly, and the adsorbed MB was photodecomposed by ultraviolet irradiation.
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Document Type: Research Article

Affiliations: Department of Materials Science and Chemistry, University of Hyogo, Shosha, Himeji, Hyogo 671-2201, Japan

Publication date: 2010-02-01

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