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An inorganic hydrothermal route to photocatalytically active bismuth vanadate


Zhou, Y; Vuille, K; Heel, A; Probst, B; Kontic, R; Patzke, Greta R (2010). An inorganic hydrothermal route to photocatalytically active bismuth vanadate. Applied Catalysis A: General, 375(1):140-148.

Abstract

BiVO4 has attracted research interest as one of the most promising visible-light-driven oxidic photocatalysts for water splitting and wastewater treatment. Highly crystalline BiVO4 particles with a homogeneous morphology are now available from a straightforward, one-step hydrothermal protocol. The facile morphology control of BiVO4 particles in the Bi(NO3)(3)center dot 5H(2)O/V2O5/K2SO4 hydrothermal system is achieved through K2SO4 as an inorganic additive that brings forward materials with a high photocatalytic activity. BiVO4 particles generated from this inorganic additive-assisted approach outperform BiVO4 materials obtained via other preparative routes in the decomposition of methylene blue (MB) under visible light irradiation. The relations between morphology, crystallinity and photocatalytic O-2 evolution in the presence of AgNO3 and FeCl3 as sacrificial reagents were studied with respect to the hydrothermal optimization of material properties. Furthermore, the Bi(NO3)(3)center dot 5H(2)O/V2O5/K2SO4 hydrothermal system brings forward potassium vanadate fibers as a second phase that also exhibits promising photocatalytic properties with respect to the decomposition of MB in the presence of visible light. (C) 2009 Elsevier B.V. All rights reserved.

Abstract

BiVO4 has attracted research interest as one of the most promising visible-light-driven oxidic photocatalysts for water splitting and wastewater treatment. Highly crystalline BiVO4 particles with a homogeneous morphology are now available from a straightforward, one-step hydrothermal protocol. The facile morphology control of BiVO4 particles in the Bi(NO3)(3)center dot 5H(2)O/V2O5/K2SO4 hydrothermal system is achieved through K2SO4 as an inorganic additive that brings forward materials with a high photocatalytic activity. BiVO4 particles generated from this inorganic additive-assisted approach outperform BiVO4 materials obtained via other preparative routes in the decomposition of methylene blue (MB) under visible light irradiation. The relations between morphology, crystallinity and photocatalytic O-2 evolution in the presence of AgNO3 and FeCl3 as sacrificial reagents were studied with respect to the hydrothermal optimization of material properties. Furthermore, the Bi(NO3)(3)center dot 5H(2)O/V2O5/K2SO4 hydrothermal system brings forward potassium vanadate fibers as a second phase that also exhibits promising photocatalytic properties with respect to the decomposition of MB in the presence of visible light. (C) 2009 Elsevier B.V. All rights reserved.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Date:26 February 2010
Deposited On:24 Feb 2011 14:15
Last Modified:20 Feb 2018 01:59
Publisher:Elsevier
ISSN:0926-860X
Additional Information:555
OA Status:Closed
Publisher DOI:https://doi.org/10.1016/j.apcata.2009.12.031
Other Identification Number:ISI:000275144200018

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