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A study of structural memory effects in synthetic hydrotalcites using environmental SEM

By Kristy L. Erickson, Thor E. Bostrom and Ray L. Frost


The ‘memory’ effect in synthetic hydrotalcite was demonstrated using d(001) and d(002) peaks in XRD patterns. These peaks were present in the hydrotalcite before it was calcined, and after it was reformed, but not in the thermally activated hydrotalcite. SEM images were taken of the hydrotalcite, to show the layering and size of the crystals. Environmental SEM (ESEM) images were taken of the thermally activated hydrotalcite, and then manipulation of temperature and pressure allowed water to condense on the sample. The ESEM images show that the layered structure is reforming following exposure to water

Topics: 030200 INORGANIC CHEMISTRY, Hydrotalcites, Structural memory effects, Environmental SEM
Publisher: Elsevier
Year: 2004
DOI identifier: 10.1016/j.matlet.2004.08.035
OAI identifier:

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