Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 91, Issue 3, Pages 486-491Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20170373
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Funding
- Hosokawa Powder Technology Foundation
- Noguchi Institute
- Chemical Conversion of Light Energy program of PRESTO/Japan Science and Technology Agency (JST)
- [JP15K14220]
- [JP16H06130]
- [JP16H06441]
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Co3O4-loaded TiO2 is a photocatalyst capable of oxidizing water into O-2 by absorbing an entire range of visible light (400 < lambda < 850 nm). In this work, the photocatalytic activity for water oxidation was investigated with respect to crystal phase, specific surface area, and surface morphology of TiO2 support. Results of photocatalytic reactions using six different TiO2 samples that possessed single-phase anatase or rutile structure indicated that the activity could be improved by applying a TiO2 support that had larger specific surface area, because it could accommodate larger amount of Co3O4 with minimal impact of undesirable aggregation. It was also suggested that when the specific surface area is similar, the activity is largely insensitive to crystal phase of TiO2, but is influenced by the surface morphology of TiO2, which can affect the dispersion of Co3O4.
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