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Significantly improved charge collection and interface injection in 3D BiVO4 based multilayered core–shell nanowire photocatalysts

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Abstract

It is challenging to design a photocatalyst with high-efficiency light absorption, charge separation and even high-efficiency charge transfer. Here, we report a demonstration by utilizing a three-dimensional multilayered core–shell nanowire array (rGO-ITO@BiVO4) as the composite photocatalyst. The core–shell structure can shorten the length of charge transfer and enhance light absorption through multireflection. RGO with defects can work as the charge transfer medium to improve the hole injection from semiconductor to electrolyte. Associated with the above effects, the Co-pi electrocatalyst modified rGO-ITO@BiVO4 photocatalyst yields a photocurrent of about 6.0 mA cm−2 at 0.6 V vs. Ag/AgCl. Transient-state surface photovoltage measurement shows that the rGO layer can prolong the lifetime of the photogenerated holes through π–π interactions, so that more holes can participate in the water oxidation reaction.

Graphical abstract: Significantly improved charge collection and interface injection in 3D BiVO4 based multilayered core–shell nanowire photocatalysts

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Publication details

The article was received on 20 Jul 2017, accepted on 22 Aug 2017 and first published on 23 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR05285E
Citation: Nanoscale, 2017, Advance Article
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    Significantly improved charge collection and interface injection in 3D BiVO4 based multilayered core–shell nanowire photocatalysts

    Z. Zhang, Y. Li, X. Jiang, W. Han, M. Xie, F. Wang and E. Xie, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR05285E

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