Maqola

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

Feiyan XuFoshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan, 528200, P.R. ChinaKai MengState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. ChinaCheng BeiState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. ChinaShengyao WangCollege of Science, Huazhong Agricultural University, Wuhan, 430070, P.R. China. [email protected]Jingsan XuSchool of Chemistry and Physics & Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia. [email protected]Jiaguo YuFoshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan, 528200, P.R. China. [email protected]

2020en

ABI

Annotatsiya

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.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1038/s41467-020-18350-7

Iqtiboslar va manbalar

6 ta iqtibos0 ta foydalanilgan manba

Koʻrsatkichlar — AkademScholar