Thermal properties of Co-, Ni- and Cu-exchanged montmorillonite with 3-hydroxypyridine |
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Authors: | M Kubranová E Jóna E Rudinská K Nemceková D Ondrušová M Pajtášová |
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Institution: | (1) Department of Inorganic Chemistry, Slovak Academy of Sciences, 842 36 Bratislava, Slovakia;(2) Department of Chemistry and Technology of Inorganic Materials, Faculty of Industrial Technologies, Trencín University of Alexander Dubcek in Trencín, 020 32 Púchov, Slovakia |
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Abstract: | Thermal analysis (TG, DTG), powder diffraction analysis (RTG) and infrared absorption spectra (IR spectra) were used to study
of release of 3-hydroxypyridine (3-OHpy) from Co-, Ni- and Cu-exchanged montmorillonite (Co-MMT, Ni-MMT, Cu-MMT). It was found
that release of 3-OHpy under heating from Co- and Ni-MMT proceeds in three distinct steps while from Cu-MMT in four steps.
The first step can be assigned to the release of physically sorbed 3-OHpy while the last one corresponds to the lattice dehydroxylation.
The second step (Co-, Ni-MMT) and/or second and third steps (Cu-MMT) can be assigned to release of chemically bonded 3-OHpy.
This investigation shows that studied exchanged montmorillonites predominantly exhibit Lewis acid character.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | Ni- and Cu-exchanged montmorillonite 3-hydroxypyridine Co- |
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