| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Efficient water splitting system using nitrogen or sulfur anion based semiconductor photocatalysts was developed. Doping of cation with four valence electrons, such as Ti4+, into Nb5+ site in Nb-based oxynitrides (SrNbO2N, BaNbO2N) led to decrease in their carrier densities, resulting in improvement of their photoelectrochemical performances. Furthermore, loading of appropriate cocatalyst enabled them to stably oxidize water to oxygen. The surface modification with zinc or indium cyanoferrate species was revealed to significantly increase the rate of H2 evolution on Pt-loaded ZnIn2S4 photocatalyst under visible light in the presence of [Fe(CN)6]4- as an electron donor basically due to the stable redox behavior.
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