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- W2769569314 abstract "Nanoceria was synthesized by treating cerium carbonate hydrate in a molten KOH-NaOH mixture at 200 °C. The nanoceria thus synthesized under a hydrogen atmosphere had a crystal size of 21.6 nm measured by XRD, consistent with the particle size of 23 nm measured by TEM. Raman spectra results indicated that the nanoceria produced under hydrogen had a downshift of 0.9 cm−1 from the sample synthesized in air. XPS spectra showed that the Ce3+ fraction of the nanoceria synthesized in hydrogen was greater than that produced in air. The oxygen vacancies were formed by partial oxidization of the precursor in molten KOH-NaOH mixture. The UV–visible absorption properties of ceria synthesized under hydrogen showed a 34 nm red-shift compared with that synthesized in air. The nanoceria prepared in this work had a better catalytic property for CO oxidization than the commercial nanoceria. Results indicated that the increased Ce3+ fraction or oxygen vacancies formed by this partial oxidization process extended the absorption edge of ceria resulting in a narrower band gap, and enhanced the catalytic activity of nanoceria. This method has proven to provide a simple and scalable method for the synthesis of high quality nanoceria." @default.
- W2769569314 created "2017-12-04" @default.
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- W2769569314 date "2018-03-01" @default.
- W2769569314 modified "2023-10-06" @default.
- W2769569314 title "Nanoceria synthesis in molten KOH-NaOH mixture: Characterization and oxygen vacancy formation" @default.
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- W2769569314 doi "https://doi.org/10.1016/j.ceramint.2017.11.172" @default.
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