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In this study, we have investigated the effects of heat-treatment condition and SiO2 addition on the crystallization behavior and chemical durability of TiO2­ZnO­B2O3­Al2O3 (TZBA) glass. Systematic analysis indicated that not only the precipitated phases (rutile, anatase, and brookite) after crystallization but also the chemical durability of TZBA glass-ceramics were affected by heattreatment condition and SiO2 addition. In a specific glass composition, we have found that etching resulted in TiO2 grains of several dozen nanometers and asperity of several hundred nanometers at the sample surface. The present method, in which the increase of specific surface area and formation of nanoparticles at the surface is achieved by chemical etching, will become an important technique for the fabrication of novel bulk photocatalysts with high catalytic activity.

journal of the ceramic society of japan

Selective crystallization of anatase and rutile by control of heat-treatment conditions and SiO&lt;sub&gt;2&lt;/sub&gt; addition in TiO&lt;sub&gt;2&lt;/sub&gt;-crystallized glass