Journal
ADVANCED ENGINEERING MATERIALS
Volume 13, Issue 11, Pages 996-1001Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.201100025
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Funding
- German Academic Exchange Service (DAAD)
- German Research Council (DFG)
- Council for Scientific and Industrial Research, India (CSIR)
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Photocatalytic active silica-based foams were prepared by embedding nanotitania (anatase) into a self-foaming glass particle-loaded preceramic polymer and then thermally converting it in air into a silica-based material. The foaming behavior of the mixture was found to be influenced by the volume fraction of the filler materials, resulting in open-cellular or fused composite materials. Transformation from the anatase modification into the rutile modification is prevented even at 800 degrees C by the formation of Si-O-Ti bonds. The composite foam structure with embedded nanotitania was tested in methylene blue decomposition under UV irradiation and it was found to have higher photocatalytic activity compared to unsupported nanotitania.
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