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Structural, morphological and optical characteristics of fusiform Co-doped CeO2 via a facile hydrothermal method

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Abstract

In this study, the fusiform Co-doped CeO2 particles were prepared by a hydrothermal method and characterized by X-ray diffraction (XRD), thermo-gravimetric differential thermal analysis (TG–DTA), scanning electron microscope (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectrometer (EDX), X-ray photo-electron spectroscopy (XPS), Raman, photoluminescence (PL) and UV–Vis spectroscopy. The cubic fluorite structure of CeO2 were supported by XRD. Initially thermal gravimetric and differential thermal analysis were used to analyse the reaction mechanism and chemical process, which indicated a crystal temperature of the as-synthesized CeO2 particles at 600 °C. The reaction concentration of the solution were systematically researched. It is found that the reaction concentration is one key parameter for controlling the final micrographs. The optical properties were characterized by Raman, PL and UV–Vis spectroscopy. It has been demonstrated that oxygen vacancies and Ce3+ exist at the particle surfaces and boundaries. The appearance of luminescence peaks and emission peaks can be ascribed to the related oxygen defects. The appearance of Ce3+ and oxygen defects existing in fusiform Co-doped CeO2 products can cause the formation of several local band gap states, which is perhaps responsible for the red shift of band gap.

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Acknowledgements

This work was supported by the Anhui Provincial Natural Science Foundation of China (1508085SME219).

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Authors and Affiliations

  1. School of Physics and Materials Science, Anhui University, 111 Jiulong Road, Hefei, 230601, People’s Republic of China

    Peng Wang, Fanming Meng, Chao Gao, Wei Xie, Jie Wang & Aixia Li

  2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian, 116024, People’s Republic of China

    Fanming Meng

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  1. Peng Wang
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  3. Chao Gao
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  4. Wei Xie
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Correspondence to Fanming Meng.

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Wang, P., Meng, F., Gao, C. et al. Structural, morphological and optical characteristics of fusiform Co-doped CeO2 via a facile hydrothermal method. J Mater Sci: Mater Electron 29, 11482–11488 (2018). https://doi.org/10.1007/s10854-018-9243-5

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  • DOI: https://doi.org/10.1007/s10854-018-9243-5

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