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Stacking of lamellae in Mg/Al hydrotalcites: Effect of metal ion concentrations on morphology

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Title Stacking of lamellae in Mg/Al hydrotalcites: Effect of metal ion concentrations on morphology
 
Creator PANDA, HS
SRIVASTAVA, R
BAHADUR, D
 
Subject layered double hydroxides
spinel ferrites
mg
intercalation
nanomaterials
precursors
exchange
shape
acid
chemical synthesis
electron microscopy
layered compounds
 
Description A hybrid nanocomposite based on the intercalation of carbonate anion has been synthesized through co-precipitation technique. Powder X-ray diffraction patterns (PXRD) showed pure layered double hydroxide (LDH) phases having crystallite size around 20 and 13 nm in 'a' and 'c' crystallographic directions, respectively. Fourier transform infrared and Raman spectroscopy measurements exhibit shifting of bands with increase of divalent metal ion concentration and it further suggests the presence of carbonate anions. Differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA) exhibit the three stages of thermal degradation, which is characteristic behaviour of layered double hydroxide. CHN and energy dispersive X-ray analysis support the PXRD and spectroscopy results. The nature of charge observed through Zeta potential analyzer is positive. Transmission electron microscope (TEM) exhibits the characteristic LDH platelet morphology with the platelets stacked one above the other. (C) 2007 Elsevier Ltd. All fights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-26T14:58:45Z
2011-12-26T12:57:29Z
2011-12-27T05:42:08Z
2011-08-26T14:58:45Z
2011-12-26T12:57:29Z
2011-12-27T05:42:08Z
2008
 
Type Article
 
Identifier MATERIALS RESEARCH BULLETIN, 43(6), 1448-1455
0025-5408
http://dx.doi.org/10.1016/j.materresbull.2007.06.037
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11347
http://hdl.handle.net/10054/11347
 
Language en