Résumé
As an effective way to enhance the photo/electro-catalytic performance of titanium dioxide (TiO2) is to explore the positive roles of doped fluorine sites in the fluorinated TiO2 systems, which, currently still lacks the direct experimental evidence due to the complexity of the species involved. Herein, we have fabricated TiOF2/TiO2 with interfacial bridging fluorine (Ti2–F) via a coherent phase transition through hydrothermal synthesis. Nuclear magnetic resonance and electron paramagnetic resonance characterization have provided strong evidence of the transformation of the doped fluorine from Ti2–F to Ti1–F and the subsequent generation of Ti3+ at the interface of the TiOF2 and TiO2 under UV–visible (UV–vis) light irradiation. Density functional theory (DFT) calculations and photo/electrochemical measurements further confirmed the electron donor behavior of the Ti3+. The benefit is a significantly enhanced charge transfer efficiency in TiOF2/TiO2, which not only resulted in improved performances for the photodegradation of acetone being 5.5 times higher than the commercial TiO2 but also supported high capacity for sodium-ion storage. Thus, the TiOF2/TiO2 with
Ti2–F provided a perfect structure to investigate the roles of fluorine sites in fluorinated TiO2 systems and their interaction with material properties.
langue originale | Anglais |
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Pages (de - à) | 1573-1581 |
Nombre de pages | 9 |
journal | CCS Chemistry |
Volume | 2 |
Numéro de publication | 6 |
Les DOIs | |
Etat de la publication | Publié - déc. 2020 |
Financement
This research was made possible as a result of a generous grant from the National Key R&D Program of China (no. 2017YFC1103800), the Program for Changjiang Scholars and Innovative Research Team in University (no. IRT_15R52), the joint National Natural Science Foundation of China-Deutsche Forschungsgemeinschaft (NSFC-DFG) project (NSFC grant no. 51861135313 and DFG no. JA466/39-1), the China Postdoctoral Science Foundation (no. 2020M672961), the International Science and Technology Cooperation Program of China (no. 2015DFE52870), the Fundamental Research Funds for the Central Universities (nos. 19lgpy113 and 19lgzd16), the Science and Technology Research Project of Hubei Province Department of Education (no. D20191001), Jilin Province Science and Technology Development Plan (no. 20180101208JC), and the National 111 project (no. B20002), Ministry of Science and Technology and Ministry of Education, China.
Bailleurs de fonds | Numéro du bailleur de fonds |
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Jilin Province Science and Technology Development Plan | 20180101208JC |
NSFC-DFG | |
National Natural Science Foundation of China-Deutsche Forschungsgemeinschaft | |
Deutsche Forschungsgemeinschaft | JA466/39-1 |
National Natural Science Foundation of China | 51861135313 |
Ministry of Education of the People's Republic of China | |
Ministry of Science and Technology of the People's Republic of China | |
China Postdoctoral Science Foundation | 2020M672961 |
National Key Research and Development Program of China | 2017YFC1103800 |
Fundamental Research Funds for the Central Universities | 19lgpy113, 19lgzd16 |
International Science and Technology Cooperation Programme | 2015DFE52870 |
Higher Education Discipline Innovation Project | B20002 |
Program for Changjiang Scholars and Innovative Research Team in University | IRT_15R52 |
Key Science and Technology Research Project in Jiangxi Province Department of Education | D20191001 |
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Physico-chimie et caractérisation (PC2)
Wouters, J. (!!Manager), Aprile, C. (!!Manager) & Fusaro, L. (!!Manager)
Plateforme technologique Caracterisation physico-chimiquesEquipement/installations: Plateforme technolgique