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Novel‐Type Inorganic Foams from Preceramic Polymers with Embedded Titania Nanoparticles for Photo‐Catalytic Applications
Author(s) -
Bhattacharjee Sarama,
Das Pratik Ranjan,
Ohl Christiane,
Wilker Viola,
Kappa Mathias,
Scheffler Franziska,
Scheffler Michael
Publication year - 2011
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201100025
Subject(s) - materials science , photocatalysis , anatase , rutile , polymer , chemical engineering , composite number , composite material , decomposition , nanoparticle , particle (ecology) , methylene blue , catalysis , nanotechnology , organic chemistry , chemistry , engineering , oceanography , geology
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 °C by the formation of SiOTi 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.