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Issue 25, 2015
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Z-scheme water splitting under visible light irradiation over powdered metal-complex/semiconductor hybrid photocatalysts mediated by reduced graphene oxide

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Abstract

A powdered Z-scheme system for the photocatalytic water splitting reaction under visible light irradiation was successfully demonstrated utilizing a combination of a metal-complex catalyst, reduced graphene oxide (RGO), and semiconductor photocatalysts. A Ru-complex electrocatalyst, [Ru (2,2′-bipyridine)(4,4′-diphosphonate-2,2′-bipyridine)(CO)2]2+, linked with SrTiO3 : Rh (Rh: 4 at%) as a H+ reduction photocatalyst was coupled with BiVO4 as a water oxidation photocatalyst and RGO as a solid-state electron mediator. H2 and O2 evolved stoichiometrically under visible light irradiation (λ > 420 nm) and the turnover number for the Ru-complex was calculated to be 450 after 8.5 h of irradiation time, which indicates that this Z-scheme system splits water photocatalytically and the Ru-complex functions as an efficient cocatalyst for hydrogen evolution by water splitting.

Graphical abstract: Z-scheme water splitting under visible light irradiation over powdered metal-complex/semiconductor hybrid photocatalysts mediated by reduced graphene oxide

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Publication details

The article was received on 20 Mar 2015, accepted on 11 May 2015 and first published on 13 May 2015


Article type: Paper
DOI: 10.1039/C5TA02045J
J. Mater. Chem. A, 2015,3, 13283-13290

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    Z-scheme water splitting under visible light irradiation over powdered metal-complex/semiconductor hybrid photocatalysts mediated by reduced graphene oxide

    T. M. Suzuki, A. Iwase, H. Tanaka, S. Sato, A. Kudo and T. Morikawa, J. Mater. Chem. A, 2015, 3, 13283
    DOI: 10.1039/C5TA02045J

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