ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
PXRD (powder x-ray diffraction), FT-IR (Fourier Transform infrared), N2 adsorption at -196 ºC and TG/DTA (thermogravimetric and differential thermal analyses) techniques have beenused for characterisation of MgAl- and ZnAl-CrO4 LDHs, which had been prepared by the ionexchange method from the corresponding chloride LDH (layered double hydroxides) precursors.The results indicates that the oxometalate intercalation in both systems produces interlayermicroporosity and a basal spacing of 8.7 Å; This gallery height decreases when the samples arecalcined in the temperature range 100-300 ºC, due to a grafting process. A larger thermal stability isdetected for MgAl-CrO4 sample than for the zinc-containing one
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/12/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.514-516.1541.pdf
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