Effects of Dye Mixing on Photocatalytic Splitting of H2O into H2 and O2 on KTaO3 |
| Journal |
Materials Science Forum (Volumes 544 - 545) |
| Volume |
Eco-Materials Processing and Design VIII |
| Edited by |
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee |
| Pages |
51-54 |
| DOI |
10.4028/www.scientific.net/MSF.544-545.51 |
| Online since |
May, 2007 |
| Authors |
Hidehisa Hagiwara,
Hiroshige Matsumoto,
Tatsumi Ishihara
|
| Keywords |
Dye-Mixing, Dye-Sensitization, KTaO3, Water Splitting |
| Abstract |
Effects of mixing dye sensitizer for the photocatalytic activity of dye-sensitized
Pt/K0.95Ta0.92Zr0.08O3 was investigated. It was found that the photocatalytic activity was greatly
improved by mixing dye sensitizer on the catalyst, and among the examined combination of organic
dyes, the highest photocatalytic activity was obtained by mixing Cr-tetraphenylporphyrin (Cr-TPP)
and Pentametylene bis[4-(10, 15, 20-triphenylporphine-5-yl)benzoate] dizinc(ΙΙ) (Zn-TPP dimer).
In order to identify the effect of dye sensitizer, photovoltaic behavior of the dye-sensitized KTaO3
was investigated. The lifetime of the photo-exited electron and hole can be improved by coating
with dye sensitizer. Thus, the effect of porphyrinoids would be explained by the improved
efficiency of charge separation. |
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