Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 4, Issue 9, Pages 1486-1493Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200900154
Keywords
film; macroporosity; mesoporous materials; photochemistry; titania
Categories
Funding
- Ministry of Economy, Trade and Industry (METI), Japan
Ask authors/readers for more resources
Hierarchically porous titania films were fabricated by dual templating using a triblock copolymer such as Pluronic F127 and polystyrene (PS) beads, affording mesoporous films with controlled macroporosity. The presence of the triblock copolymer in the precursor solutions suppressed a regular accumulation of spherical PS beads, and PS-derived macropores could be dispersed over the whole mesoporous titania film through rapid fabrication by spin-coating. Some of the macropores were clustered, but the presence of the large spaces was important for keeping the mesostructure after calcination. Photodegradation of methylene blue (MB) was investigated by using the photoactive anatase films. The photodegradation of MB over the porous anatase films was accelerated by effective diffusion of MB molecules in the PS-derived macropores, but it was important for improving photocatalytic performance to regulate the balance between the effectiveness of the diffusion in the macropores and the decrease of the surface area from the embedded macropores, as well as the reduction in the transparency of the porous films.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available