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Preparation of Porous TiO2 Sheets by Aqueous Tape Casting and their Photocatalytic Activation

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Porous titania (TiO2) sheets were prepared by aqueous tape casting. In slurry preparation, ammonium polyacrylate, polyvinyl alcohol, and polyethylene glycol were used as dispersant, binder, and plasticizer, respectively. The properties of slurries were characterized by -potential, sedimentation test, and rheological behavior. The influences of sintering temperature on the open porosity, phase composition, and microstructure of the specimens were studied. The open porosity of the specimens ranged from 44% to 58%. The results indicate that the photocatalytic efficiency of specimens is closely related to the phase composition, the open porosity as well as the grain size of TiO2 sheet. The porous TiO2 sheets have lower efficiency than TiO2 powder; however, the porous sheets do not result in the secondary contamination problem.
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Document Type: Research Article

Affiliations: Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Publication date: 2008-09-01

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