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Step-by-Step Mechanism Insights into the TiO <sub>2</sub> /Ce <sub>2</sub> S <sub>3</sub> S-Scheme Photocatalyst for Enhanced Aniline Production with Water as a Proton Source

Feiyan XuLaboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, P. R. ChinaKai MengState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. ChinaShuang CaoState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. ChinaChenhui JiangHefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. ChinaTao ChenHefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. ChinaJingsan XuSchool of Chemistry and Physics & Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4001, AustraliaJiaguo YuLaboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, P. R. China
2021en
ABI

Аннотация

Exploring heterostructured photocatalysts for the photocatalytic hydrogenation reaction with water as a proton source and investigating the corresponding intrinsic step-by-step mechanism are of great interest. Here, we develop an S-scheme heterojunction through theoretical design and carried out solvothermal growth of Ce2S3 nanoparticles (NPs) onto electrospun TiO2 nanofibers. The low-dimensional (0D/1D) heterostructure unveils enhanced photocatalytic activity for aniline production by nitrobenzene hydrogenation with water as a proton source. Density functional theory (DFT) calculations indicate the electrons transfer from Ce2S3 to TiO2 upon hybridization due to their Fermi level difference and creates an internal electric field at the interface, driving the separation of the photoexcited charge carriers, which is authenticated by in situ X-ray photoelectron spectroscopy along with femtosecond transient absorption spectroscopy. The step-by-step reaction mechanism of the photocatalytic nitrobenzene hydrogenation to yield aniline is revealed by in situ diffuse reflectance infrared Fourier transform spectroscopy, associated with DFT computational prediction.

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DOI
10.1021/acscatal.1c04903

Цитирования и источники

Цитирований: 3Использованных источников: 0
Показатели — AkademScholar