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Porous Photocatalytic TiO 2 Thin Films by Aerosol Deposition
Author(s) -
Ryu Jungho,
Hahn ByungDong,
Choi JongJin,
Yoon WoonHa,
Lee ByoungKuk,
Choi Joon Hwan,
Park DongSoo
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03391.x
Subject(s) - photocatalysis , materials science , porosity , chemical engineering , aqueous solution , leaching (pedology) , composite number , thin film , adsorption , deposition (geology) , mineralogy , composite material , nanotechnology , chemistry , catalysis , organic chemistry , paleontology , environmental science , sediment , biology , soil science , engineering , soil water
Porous photocatalytic TiO 2 thin films were fabricated by the leaching technique, followed by aerosol deposition. Mixed powders of TiO 2 and β‐tricalcium phosphate (TCP) were aerosol deposited at room temperature for the initial fabrication of composite films. After the β‐TCP phases were leached out from the composite films in a diluted HCl aqueous solution for 24 h, porous TiO 2 films remained on the substrate. To fabricate these porous films, the β‐TCP content was varied from 10 to 45 wt% and submicrometer‐sized pores were formed after leaching. The porous TiO 2 films showed strong initial photocatalytic activities due to the adsorption effect of the pores and the enlarged surface area.