Abstract
AbstractExploring photocatalysts to promote CO2 photoreduction into solar fuels is of great significance. We develop TiO2/perovskite (CsPbBr3) 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 CsPbBr3 quantum dots (QDs) to TiO2, resulting in the construction of internal electric field (IEF) directing from CsPbBr3 to TiO2 upon hybridization. The IEF drives the photoexcited electrons in TiO2 to CsPbBr3 upon light irradiation as revealed by in-situ X-ray photoelectron spectroscopy analysis, suggesting the formation of an S-scheme heterojunction in the TiO2/CsPbBr3 nanohybrids which greatly promotes the separation of electron-hole pairs to foster efficient CO2 photoreduction. The hybrid nanofibers unveil a higher CO2-reduction rate (9.02 μmol g–1 h–1) comparing with pristine TiO2 nanofibers (4.68 μmol g–1 h–1). Isotope (13CO2) tracer results confirm that the reduction products originate from CO2 source.
Funder
National Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry
Reference44 articles.
1. El-Khoulya, M. E., El-Mohsnawy, E. & Fukuzumi, S. Solar energy conversion: from natural to artificial photosynthesis. J. Photochem. Photobiol. C. 31, 36–83 (2017).
2. Crake, A. Metal-organic frameworks based materials for photocatalytic CO2 reduction. Mater. Sci. Technol. 33, 1737–1749 (2017).
3. Collado, L. et al. Unravelling the effect of charge dynamics at the plasmonic metal/semiconductor interface for CO2 photoreduction. Nat. Commun. 9, 4986 (2018).
4. Xu, Q. et al. Direct Z-scheme photocatalysts: principles, synthesis, and applications. Mater. Today 21, 1042–1063 (2018).
5. Yan, Z.-H. et al. Photo-generated dinuclear {Eu(II)}2 active sites for selective CO2 reduction in a photosensitizing metal-organic framework. Nat. Commun. 9, 3353 (2018).
Cited by
872 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献