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Issue 4, 2012
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Modification of TaON with ZrO2 to improve photocatalytic hydrogen evolution activity under visible light: influence of preparation conditions on activity

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Abstract

The effects of the preparation conditions of ZrO2-modified TaON (referred to as ZrO2/TaON) on the photocatalytic activity for H2 evolution under visible light (λ > 420 nm) were investigated. ZrO2/TaON catalysts were prepared by loading particulate Ta2O5 with ZrO2 using different zirconium precursors, followed by nitridation at 1123 K for different durations (5–20 h) under NH3 flow. Nitridation of ZrO2/Ta2O5 for 15 h resulted in the production of ZrO2/TaON, regardless of the zirconium precursors used, but the physicochemical properties varied. The highest activity was obtained for ZrO2/TaON synthesized from Ta2O5 and ZrO(NO3)2·2H2O (Zr/Ta = 0.1 by mole) after nitridation for 15 h. Physicochemical analysis suggested that a lower density of anionic defects in TaON, which was realized using highly-dispersed ZrO2 nanoparticles (10–30 nm in size), contributed primarily to the enhanced activity.

Graphical abstract: Modification of TaON with ZrO2 to improve photocatalytic hydrogen evolution activity under visible light: influence of preparation conditions on activity

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Publication details

The article was received on 03 Dec 2011, accepted on 05 Jan 2012 and first published on 06 Jan 2012


Article type: Paper
DOI: 10.1039/C2CY00499B
Catal. Sci. Technol., 2012,2, 818-823

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    Modification of TaON with ZrO2 to improve photocatalytic hydrogen evolution activity under visible light: influence of preparation conditions on activity

    S. S. K. Ma, K. Maeda and K. Domen, Catal. Sci. Technol., 2012, 2, 818
    DOI: 10.1039/C2CY00499B

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