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Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction

Open access
Xu, Feiyan, Meng, Kai, Cheng, Bei, Wang, Shengyao, Xu, Jingsan, Yu, Jiaguo·2020·Nature Communications

Abstract

Exploring photocatalysts to promote CO 2 photoreduction into solar fuels is of great significance. We develop TiO 2/perovskite (CsPbBr 3) S-scheme heterojunctions synthesized by a facile electrostatic-driven self-assembling approach. Density functional theory calculation combined with experimental studies proves the electron transfer from CsPbBr 3 quantum dots (QDs) to TiO 2, resulting in the construction of internal electric field (IEF) directing from CsPbBr 3 to TiO 2 upon hybridization. The IEF drives the photoexcited electrons in TiO 2 to CsPbBr 3 upon light irradiation as revealed by in-situ X-ray photoelectron spectroscopy analysis, suggesting the formation of an S-scheme heterojunction in the TiO 2/CsPbBr 3 nanohybrids which greatly promotes the separation of electron-hole pairs to foster efficient CO 2 photoreduction. The hybrid nanofibers unveil a higher CO 2-reduction rate (9.02 μmol g–1 h–1) comparing with pristine TiO 2 nanofibers (4.68 μmol g–1 h–1). Isotope (13 CO 2) tracer results confirm that the reduction products originate from CO 2 source.

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Metadata

Authors
Xu, F., Meng, K., Cheng, B., Wang, S., Xu, J., & Yu, J.
Venue
Nature Communications
Published
2020-09-14
Volume
11
Issue
1
Pages
4613-4613
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3085189088
Cited by
1,456
References
42
FWCI
38.83
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction. https://app.cochat.ai/papers/10.1038/s41467-020-18350-7
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Xu, F., Meng, K., Cheng, B., Wang, S., Xu, J., & Yu, J. (2020). Unique S-scheme heterojunctions in self-assembled TiO2/CsPbBr3 hybrids for CO2 photoreduction. Nature Communications. https://doi.org/10.1038/s41467-020-18350-7

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