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Enhancement of charge separation in ferroelectric heterogeneous photocatalyst Bi4(SiO4)3/Bi2SiO5 nanostructures

Abstract

he photocatalytic activity of ferroelectric materials is highly influenced by the main direction of charge separation, originating from the spontaneous polarization. In this work, unique bismuth silicate based zero-dimensional (0D)/two-dimensional (2D) heterogeneous nanostructures were successfully constructed. In contrast to either individual pristine phase, this heterogeneous structure exhibited much enhanced photocatalytic activity towards the degradation of Rhodamine B and phenol. The synergistic effects of high polarization in the 2D ferroelectric Bi2SiO5 nanosheets and the band bending at the 0D-2D interface of the heterostructures have been proved to accelerate the photoinduced charge separation and the movement of separated carriers to the interface, which further improves the photodegradation performance. This work provides a novel strategy for adjusting the photoinduced carrier transfer route in the ferroelectric materials and designing novel photocatalysts with ultrafast charge separation and large active surface area.

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Publication details

The article was received on 29 Aug 2017, accepted on 11 Oct 2017 and first published on 12 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03193A
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Enhancement of charge separation in ferroelectric heterogeneous photocatalyst Bi4(SiO4)3/Bi2SiO5 nanostructures

    A. Alkeisy, L. Ren, T. Zheng, X. Xu, M. Higgins, W. Hao and Y. Du, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03193A

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