Photoinduced terminal fluorine and Ti3+ in TiOF2/TiO2 heterostructure for enhanced charge transfer

Jie Hu, Yi Lu, Xiao Long Liu, Christoph Janiak, Wei Geng, Si Ming Wu, Xiao Fang Zhao, Li Ying Wang, Ge Tian, Yuexing Zhang, Bao Lian Su, Xiao Yu Yang

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

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 originaleAnglais
Pages (de - à)1573-1581
Nombre de pages9
journalCCS Chemistry
Volume2
Numéro de publication6
Les DOIs
Etat de la publicationPublié - 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 fondsNuméro du bailleur de fonds
Jilin Province Science and Technology Development Plan20180101208JC
NSFC-DFG
National Natural Science Foundation of China-Deutsche Forschungsgemeinschaft
Deutsche ForschungsgemeinschaftJA466/39-1
National Natural Science Foundation of China51861135313
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 Foundation2020M672961
National Key Research and Development Program of China2017YFC1103800
Fundamental Research Funds for the Central Universities19lgpy113, 19lgzd16
International Science and Technology Cooperation Programme2015DFE52870
Higher Education Discipline Innovation ProjectB20002
Program for Changjiang Scholars and Innovative Research Team in UniversityIRT_15R52
Key Science and Technology Research Project in Jiangxi Province Department of EducationD20191001

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