One-Step and Self-Assembly Based Fabrication of Pt/TiO2 Nanohybrid Photocatalysts with Programmed Nanopatterns

Hybrid Pt/TiO2 nanostructures with diverse morphologies from nanodot, nanowire to mesoporous structures were obtained by a one‐step synthesis based on block copolymer self‐assembly. The structural transformation was easily tuned by controlling the relative amount of TiO2 sol–gel precursor to poly(st...

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Bibliographic Details
Published in:Chemistry : a European journal 2011-01, Vol.17 (2), p.540-545
Main Authors: Jang, Yu Jin, Kim, Dong Ha
Format: Article
Language:English
Subjects:
Assembly
Block copolymers
Chemical synthesis
Chemistry
Copolymers
Ethylene oxide
Fabrication
Hybrids
Morphology
Nanocomposites
Nanostructure
Nanotechnology
Nanowires
Photocatalysis
Photocatalysts
photochemistry
Platinum
Polystyrene resins
Self assembly
Sol-gel processes
Styrene
titanium
Titanium dioxide
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Summary:Hybrid Pt/TiO2 nanostructures with diverse morphologies from nanodot, nanowire to mesoporous structures were obtained by a one‐step synthesis based on block copolymer self‐assembly. The structural transformation was easily tuned by controlling the relative amount of TiO2 sol–gel precursor to poly(styrene‐block‐ethylene oxide) diblock copolymer (PS‐b‐PEO). These Pt/TiO2 nanocomposites were utilized as photocatalysts with enhanced activity via synergistic coupling. Key parameters including the amount of TiO2, types of morphology of photocatalysts, and the platinization of TiO2 discussed in this study affected photocatalytic performance given that the hybrids were well‐dispersed in nanopatterned configurations. Tunable morphologies from nanodot to nanowire arrays to mesoporous structures (see figure) of Pt/TiO2 nanohybrids were easily obtained by controlling the relative content of the titanium sol–gel precursors compared with the amount of block copolymers and Pt. These Pt/TiO2 nanocomposites were utilized as photocatalysts with enhanced activity via synergistic coupling.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201001802