Influence of ferroelectric dipole on the photocatalytic activity of heterostructured BaTiO3 /a-Fe2 O3

Nanotechnology
Yongfei CuiYongping Pu

Abstract

Using BaTiO3 as a model ferroelectric material we investigated the influence of the ferroelectric dipole on the photocatalytic activity of a heterogeneous BaTiO3/α-Fe2O3 photocatalyst. Two distinct BaTiO3 samples were used: BTO and BTO-A. The latter consists more ferroelectric tetragonal phase and thus stronger ferroelectricity. It was found that under identical experimental conditions, the photodecolourisation rate of a target dye using BTO-A/α-Fe2O3 under visible light was 1.3 times that of BTO/α-Fe2O3. Photoelectrochemical and photoluminescence analysis confirmed a more effective charge carrier separation in BTO-A/α-Fe2O3. Considering solely the photoexcitation of α-Fe2O3 in the composite photocatalysts under visible light and the similar microstructures of the two catalysts, we propose that the enhanced decolourisation rate when using BTO-A/α-Fe2O3 is due to the improved charge carrier separation and extended charge carrier lifetime arising from an interaction between the ferroelectric dipole and the carriers in α-Fe2O3. Our results demonstrate a new process to use a ferroelectric dipole to manipulate the charge carrier transport, overcome recombination, and extend the charge carrier lifetime of the surface material in a he...Continue Reading

References

Sep 30, 2009·Chemical Communications : Chem Comm·Hyun Gyu KimJae Sung Lee
Mar 3, 2010·Nano Letters·Fredrik BoxbergH Q Xu
Jun 5, 2010·Physical Chemistry Chemical Physics : PCCP·Linlin PengDejun Wang
Sep 23, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Matt Stock, Steve Dunn
Dec 12, 2012·Advanced Materials·Sabina M HatchSteve Dunn
Jul 11, 2013·Chemistry : a European Journal·Jin QuWei-Guo Song
Oct 3, 2013·Nanoscale·Li LiGregory S Rohrer

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Citations

Dec 17, 2021·Chemistry : a European Journal·Lizhen Liu, Hongwei Huang

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