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Construction of Cu2+-doped CeO2 nanocrystals hierarchical hollow structure and its enhanced photocatalytic performance

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Abstract

Cu2+-doped CeO2@mSiO2(CDC@mSiO2) samples with hollow structure were prepared by calcining Cu2+-doped cerium-based metal–organic framework (UiO-66 nanocrystals) precursor coated with mesoporous silica (mSiO2). BET analysis shows that Cu2+-doped CeO2@mSiO2 has a mesoporous structure and a large specific surface area (397.7 m2/g), which can provide more active sites for photocatalytic reactions. Ultraviolet absorption spectrum and PL spectrum show that the introduction of Cu2+ makes the absorption edge of the sample red-shift and accelerate the electron–hole separation efficiency. Cu2+ doping makes CeO2 produce more oxygen vacancies, which promotes photocatalysis. The Cu2+-doped CeO2@mSiO2 sample has the best photodegradation efficiency. Under simulated sunlight, the degradation rate of methyl orange within 2 h is 92.6%, and the photocatalytic rate constant is 0.0221/min. After 4 cycles of experiments, it still has excellent photocatalytic activity. Based on the characterization analysis and experimental results, the degradation mechanism of methyl orange is proposed.

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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 Materials Science and Engineering, Anhui University, 111 Jiulong Road, Hefei, 230601, People’s Republic of China

    Manling Xue, Xingbin Liu, Hao Wu, Bo Yu & Fanming Meng

  2. School of Physics and Optoelectronics Engineering, Anhui University, Hefei, 230601, People’s Republic of China

    Manling Xue, Xingbin Liu, Hao Wu, Bo Yu & Fanming Meng

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  1. Manling Xue
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Correspondence to Fanming Meng.

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Xue, M., Liu, X., Wu, H. et al. Construction of Cu2+-doped CeO2 nanocrystals hierarchical hollow structure and its enhanced photocatalytic performance. J Mater Sci: Mater Electron 32, 27576–27586 (2021). https://doi.org/10.1007/s10854-021-07132-6

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