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Enhanced visible light-driven photodegradation of rhodamine B by Ti3+ self-doped TiO2@Ag nanoparticles prepared using Ti vapor annealing

  • Wangyang Yang
  • Honglie ShenEmail author
  • Huihua Min
  • Jiawei Ge
Energy materials
  • 9 Downloads

Abstract

In recent years, Ti3+ self-doped TiO2 (B-TiO2) exhibits great potential as a photocatalyst. In this work, Ti vapor-assisted annealing is first demonstrated for Ti3+ doping and improving the visible absorption of TiO2. TEM results exhibit the formation of disordered layer, indicating the successful fabricating of B-TiO2. The absorption increase in TiO2 caused by Ti vapor annealing reaches nearly 50% in the visible wavelength range. Benefiting from the absorption increase, the photocatalytic performance of TiO2 after Ti vapor annealing increases by 60–70%. Surface modification of Ag onto B-TiO2 is also carried out to further improve its optical property. Ag-modified Ti3+ self-doped TiO2 (B-TiO2@Ag) exhibits great visible photodegradation behavior to RhB. The RhB degradation rate reaches 97.76% after 60 min of visible light irradiation. Electrochemical performance tests demonstrate that as-prepared TiO2@Ag has lower resistance than W-TiO2. The results indicate that B-TiO2@Ag has great potential in solar photocatalytic degradation of pollutant.

Notes

Acknowledgements

This work is supported by National Natural Science Foundation of China (61774084), the Fundamental Research Funds for the Central Universities (3082017NP2017106), Joint Frontier Research Project of Jiangsu Province (BY2016003-09), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX18_0273), and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Author contributions

WY has taken the responsibilities of manuscript writing and the design of experiments. HS has modified the manuscript. The relevant characterizations were done by HM. Parts of experiment were finished by JG.

Compliance with ethical standards

Conflicts of interest

The authors declare there are no conflicts of interest regarding the publication of this paper.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy ConversionNanjing University of Aeronautics and AstronauticsNanjingChina
  2. 2.College of Chemical Engineering, Advanced Analysis and Testing CenterNanjing Forestry UniversityNanjingChina

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