期刊
APPLIED CLAY SCIENCE
卷 48, 期 3, 页码 542-546出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2010.02.015
关键词
Layered double hydroxide; Hydrotalcite-like compounds; Mixed oxides; Coprecipitation; Sonication
The incorporation of Ce in Ni-Mg-Al layered double hydroxides (LDHs) was studied by coprecipitation and under sonication. Mixed oxides were obtained by calcination. X-ray diffraction (XRD) patterns of the as-synthesized samples showed formation of well-crystallized LDHs and CeO2. Rietveld refinement was employed to calculate the content of cerium that was incorporated in the LDH structure. Sonication increased the incorporation of Ce in the structure. The specific surface areas of cerium-containing LDHs prepared by the conventional method were similar to that of free-Ce sample. Synthesis under sonication significantly increased the specific surface area. After calcination both specific surface areas and pore volumes increased compared to the corresponding LDH. (C) 2010 Elsevier B.V. All rights reserved.
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