Liu, Ming and Hu, Lei and Xu, Pengfei and Zhao, Kun and Zong, Lingbo and Yu, Ranbo and Chen, Jun and Xing, Xianran (2015) Low temperature molten salt synthesis of perovskite-type ACeO3(A=Sr, Ba) in eutectic NaCl-KCl. Chemical Research in Chinese Universities, 31 (3). pp. 342-346. ISSN 1005-9040
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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| Item Type: | Article (Commonwealth Reporting Category C) |
|---|---|
| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | Files associated with this item cannot be displayed due to copyright restrictions. |
| Faculty / Department / School: | No Faculty |
| Date Deposited: | 07 Dec 2017 03:44 |
| Last Modified: | 07 Dec 2017 03:44 |
| Uncontrolled Keywords: | BaCeO3; Molten salt synthesis; Perovskite; SrCeO3; |
| Fields of Research : | 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry |
| Socio-Economic Objective: | E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences |
| Identification Number or DOI: | 10.1007/s40242-015-4330-0 |
| URI: | http://eprints.usq.edu.au/id/eprint/31938 |
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