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The spinel-type oxynitride of zinc and titanium (ZnxTiOyNz) reduces H+ to H2 and oxidizes H2O to O2 in the presence of a sacrificial electron donor and acceptor under visible light irradiation (λ > 420 nm). ZnxTiOyNz is a d0–d10 complex oxynitride photocatalyst that has the potential to be active for water splitting under visible light.
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Hisatomi et al. (2007) studied this question.
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