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Low temperature molten salt synthesis of perovskite-type ACeO3(A=Sr, Ba) in eutectic NaCl-KCl

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Abstract

A molten salt method was developed for the synthesis of ACeO3(A=Sr, Ba) with perovskite structure at 750 °C(SrCeO3) and 850 °C(BaCeO3) in the eutectic NaCl-KCl. The synthetic temperature was much lower than that of the conventional method(generally>1000 °C). The structure and morphology of the product were characterized by means of X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM) and transmission electron microscopy(TEM). The results show that the synthesized octahedral SrCeO3 crystallizes in the orthorhombic system with the unit cell parameters of a=0.85855 nm, b=0.61523 nm, c=0.60059 nm, and the synthesized cuboid BaCeO3 crystallizes in the cubic system with the unit cell parameter of a=0.43962 nm. The result of X-ray photoelectron spectroscopy(XPS) analysis indicates that both Ce4+ and Ce3+ exist in the two structures, and the Ce4+/Ce3+ peak area ratios for SrCeO3 and BaCeO3 are 1.93 and 2.12, respectively. Meanwhile, the adsorbed/lattice oxygen ratios(1.87 for SrCeO3 and 3.04 for BaCeO3) indicate the existence of a lot of oxygen vacancies in the structures of SrCeO3 and BaCeO3, which indicates a far-reaching significance to study the corresponding physicochemistry performance.

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Authors and Affiliations

  1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, P. R. China

    Ming Liu, Lei Hu, Pengfei Xu, Kun Zhao, Lingbo Zong, Ranbo Yu, Jun Chen & Xianran Xing

Authors
  1. Ming Liu
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  2. Lei Hu
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  3. Pengfei Xu
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  4. Kun Zhao
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  5. Lingbo Zong
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  6. Ranbo Yu
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  7. Jun Chen
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  8. Xianran Xing
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Corresponding author

Correspondence to Ranbo Yu.

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Supported by the National Natural Science Foundation of China(Nos.51472025, 21271021).

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Liu, M., Hu, L., Xu, P. et al. Low temperature molten salt synthesis of perovskite-type ACeO3(A=Sr, Ba) in eutectic NaCl-KCl. Chem. Res. Chin. Univ. 31, 342–346 (2015). https://doi.org/10.1007/s40242-015-4330-0

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  • DOI: https://doi.org/10.1007/s40242-015-4330-0

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