Reticulated macroporous ceramic foam supported TiO₂ for photocatalytic applications

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• 作者：Gustav Plesch ; Michal Gorbá ; r ; Ulrich F. Vogt ; Karol Jesená ; k ; Melinda Vargová
• 关键词：Catalysts ; Ceramics ; Photochemical technology ; Thick films ; TiO₂
• 刊名：Materials Letters
• 出版年：2009
• 出版时间：15 February 2009
• 年：2009
• 卷：63
• 期：3-4
• 页码：461-463
• 全文大小：469 K

文摘

Ceramic macroporous reticular alumina foams with a pore size of 15, 20 and 25 pores per inch (ppi) were prepared by the Schwartzwalder method and sintered at 1200 °C to preserve a high porosity. TiO₂ thick films were supported on the foam surface by a wash coating process, using Degussa P25 as a TiO₂ nanopowder source. After annealing at 600 °C, films with an adequate adhesion and with a thickness of 5–10 μm were obtained. An increasing pore size of the supported foams improves the specific photocatalytic activity of the TiO₂ coated scaffolds, the flow of solution through the highly active porous foam structure and the better access of light to the active TiO₂ surface.