期刊
SOLID STATE SCIENCES
卷 10, 期 8, 页码 1028-1036出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2007.11.019
关键词
crystal morphology; hydrothermal crystal growth; rare earth compounds; phosphors; catalysts
资金
- National Natural Science Foundation of China [20571068, 90406024]
- Chinese Ministry of Education [NCET2006-0552]
- Anhui Provincial Natural Science Foundation [070414194]
- Anhui Provincial Education Department [KJ2007A073]
- Curtin Research Fellow Scheme of Curtin University of Technology, Australia
- [2005CB623601]
A hydrothermal process is reported for the preparation of rare earth hydroxycarbonates LnOHCO(3) (Ln = Pr, Sm, Dy, Y) with hierarchical structures, such as dumbbell nanorod clusters, stacked lamellae and patched rods. All the hydroxycarbonate samples show fluorescence, and the emission wavelengths and intensity may be different for different samples. The hydroxycarbonate samples are generally stable under 380 degrees C, but will decompose to the respective oxides at higher temperatures. The oxides are tested for catalytic conversion of carbon monoxide to carbon dioxide. It reveals that all the rare earth oxides are active to the catalytic reaction, and Sm2O3 shows superior catalytic performance to the other oxides. (C) 2007 Elsevier Masson SAS. All rights reserved.
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