Effects of Dye Mixing on Photocatalytic Splitting of H2O into H2 and O2 on KTaO3

Hidehisa Hagiwara; Hiroshige Matsumoto; Tatsumi Ishihara

doi:10.4028/www.scientific.net/MSF.544-545.51

Paper Titles

Control of Organic Micropollutants Using Dual Functional Adsorbent/Catalyst System
p.35

Crystalline Phases and Particle Characteristics of the Combustion-Synthesized TiO₂ Nanoparticles
p.39

Design of Rotational Particle Structure with Negative Poisson’s Ratio Using Numerical Method
p.43

Effect of Deformation Temperature and Strain on Recrystallization Behavior of a Nb Micro-Alloyed Steel
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Effects of Dye Mixing on Photocatalytic Splitting of H₂O into H₂ and O₂ on KTaO₃
p.51

Emergence Change of Carbon Dioxide from Artificial Skin by Titania Photocatalyst
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Enhanced Photocatalytic Activities of Ta₂O₅ and Nitrogen Co-Doped TiO₂ under Visible Light Irradiation
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Growth and Microstructure of Gallium Phosphide Nanowires Synthesized by the CVD Method Using Copper Oxide as a Catalyst
p.63

High-Aspect-Ratio Titanium Oxide Nanotubes Anodized in KH₂PO₄/NH₄F/Citric Acid Electrolytes
p.67

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Effects of Dye Mixing on Photocatalytic Splitting of H₂O into H₂ and O₂ on KTaO₃

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.