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Photocatalytic and magnetic properties of loosened ceria hollow microspheres synthesized by a single-step hydrothermal method

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Abstract

Loosened CeO2 hollow microspheres with 0.5–1 μm in diameter have been successfully synthesized by a single-step hydrothermal method using Ce(NO3)·6H2O as cerium, urea as precipitant, HNO3 as mineralizer, and polyvinyl pyrrolidone as complexant at 200 °C for different time periods. X-ray diffraction inferred that Ce(OH)CO3 was gradually transformed to CeO2 with increasing reaction time from 12 to 60 h, and no Ce(OH)CO3 was detected but CeO2 when the reaction time was 60 h. XPS and UV–Vis absorption spectra analysis indicated that the as-synthesized CeO2 contained a large number of Ce3+ in their surface. M–H curve for the loosened CeO2 hollow microspheres showed an excellent ferromagnetic behavior at room-temperature, which can be attributed to the presence of Ce3+ ions. The BET surface area of the catalyst was confirmed to be 83.83 m2 g−1 synthesized at 200 °C for 60 h. Correspondingly, its pore width distribution was 6.5 nm. The photocatalytic activities of the ceria were evaluated by the photodegradation of methyl orange under UV light irradiation. Not only the presence of Ce3+ ions, but the high surface area led to the excellent photocatalytic performance of the loosened CeO2 hollow microspheres.

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Acknowledgments

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, Hefei, 230601, People’s Republic of China

    Fanming Meng, Huijie Li, Jinfeng Gong & Zhenghua Fan

  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. Fanming Meng
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  2. Huijie Li
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Correspondence to Fanming Meng.

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Meng, F., Li, H., Gong, J. et al. Photocatalytic and magnetic properties of loosened ceria hollow microspheres synthesized by a single-step hydrothermal method. J Mater Sci: Mater Electron 27, 8433–8439 (2016). https://doi.org/10.1007/s10854-016-4857-y

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  • DOI: https://doi.org/10.1007/s10854-016-4857-y

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