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Solar photocatalysts from Gd–La codoped TiO2 nanoparticles

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Abstract

Gd–La codoped TiO2 nanoparticles with diameter of 10 nm were successfully synthesized via a sol–gel method. The photocatalytic activity of the Gd–La codoped TiO2 nanoparticles evaluated by photodegrading methyl orange has been significantly enhanced compared to that of undoped or Gd or La monodoped TiO2. Ti4+ may substitute for La3+ and Gd3+ in the lattices of rare earth oxides to create abundant oxygen vacancies and surface defects for electron trapping and dye adsorption, accelerating the separation of photogenerated electron–hole pairs and methyl orange photodegradation. The formation of an excitation energy level below the conduction band of TiO2 from the binding of electrons and oxygen vacancies decreases the excitation energy of Gd–La codoped TiO2, resulting in versatile solar photocatalysts. The results suggest that Gd–La codoped TiO2 nanoparticles are promising for future solar photocatalysts.

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Acknowledgements

The authors gratefully acknowledge Ocean University of China for providing Seed Fund to this project, and Fundamental Research Funds for the Central Universities (201313001, 201312005), Shandong Province Outstanding Youth Scientist Foundation Plan (BS2013CL015), Doctoral Fund of Ministry of Education of China (20130132120023), Shandong Provincial Natural Science Foundation (ZR2011BQ017), and Research Project for the Application Foundation in Qingdao (13-1-4-198-jch).

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, Ocean University of China, Qingdao, 266100, Shandong, People’s Republic of China

    Xiaoxu Chen, Hongyuan Cai, Qunwei Tang & Benlin He

  2. Electron Microscopy Center, University of South Carolina, Columbia, SC, 29208, USA

    Yingchao Yang

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  1. Xiaoxu Chen
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  2. Hongyuan Cai
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Correspondence to Qunwei Tang.

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Chen, X., Cai, H., Tang, Q. et al. Solar photocatalysts from Gd–La codoped TiO2 nanoparticles. J Mater Sci 49, 3371–3378 (2014). https://doi.org/10.1007/s10853-014-8045-2

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  • DOI: https://doi.org/10.1007/s10853-014-8045-2

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