Journal
NATURE MATERIALS
Volume 9, Issue 7, Pages 559-564Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT2780
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Funding
- Japan Society for the Promotion of Science (JSPS)
- World Premier International Research Center Initiative on Materials Nanoarchitectonics, MEXT
- Japan Science and Technology Agency (JST), Japan
- Australian Research Council (ARC)
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The search for active semiconductor photocatalysts that directly split water under visible-light irradiation remains one of the most challenging tasks for solar-energy utilization(1-6). Over the past 30 years, the search for such materials has focused mainly on metal-ion substitution as in In(1-x)Ni(x)TaO(4) and (V-; Fe- or Mn-) TiO(2) (refs 7,8), non-metal-ion substitution as in TiO(2-x)N(x) and Sm(2)Ti(2)O(5)S(2) (refs 9,10) or solid-solution fabrication as in (Ga(1-x)Zn(x))(N(1-x)O(x)) and ZnS-CuInS(2)-AgInS(2) (refs 11,12). Here we report a new use of Ag(3)PO(4) semiconductor, which can harness visible light to oxidize water as well as decompose organic contaminants in aqueous solution. This suggests its potential as a photofunctional material for both water splitting and waste-water cleaning. More generally, it suggests the incorporation of p block elements and alkali or alkaline earth ions into a simple oxide of narrow bandgap as a strategy to design new photoelectrodes or photocatalysts.
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