Effect of Ferroelectricity on Solar-Light-Driven Photocatalytic Activity of BaTiO3? Influence on the Carrier Separation and Stern Layer Formation

Journal article


Cui, Y, Briscoe, J and Dunn, S (2013). Effect of Ferroelectricity on Solar-Light-Driven Photocatalytic Activity of BaTiO3? Influence on the Carrier Separation and Stern Layer Formation. Chemistry of Materials. 25 (21), pp. 4215-4223.
AuthorsCui, Y, Briscoe, J and Dunn, S
Abstract

BaTiO3 is used as a target catalyst to probe the influence of ferroelectricity on the decolorization of a typical dye molecule—Rhodamine B—under simulated solar light. We show that there is a 3-fold increase in the decolorization rate using BaTiO3 with a high tetragonal content compared to predominantly cubic material. This is ascribed to the ferroelectricity of the tetragonal phase. The influence of ferroelectricity ensures a tightly bound layer of dye molecule and also acts to separate the photoexcited carriers due to the internal space charge layer. Both of these features act to enhance the catalytic performance. When nanostructured Ag is photochemically deposited on the surface of the BaTiO3, we find a further increase in the reaction rate that gives complete decolorization of the dye in around 45 min.

Year2013
JournalChemistry of Materials
Journal citation25 (21), pp. 4215-4223
PublisherACS Publications
Digital Object Identifier (DOI)doi:10.1021/cm402092f
Publication dates
Print17 Oct 2013
Publication process dates
Deposited11 Jan 2019
Accepted17 Sep 2013
Accepted author manuscript
License
CC BY 4.0
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https://openresearch.lsbu.ac.uk/item/878vx

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