Thermal behaviour of Cu-Mg-Mn and Ni-Mg-Mn layered double hydroxides and characterization of formed oxides

0030043 - ÚACH 2006 RIV NL eng J - Journal Article
Kovanda, F. - Grygar, Tomáš - Dorničák, V. - Rojka, T. - Bezdička, Petr - Jirátová, Květa
Thermal behaviour of Cu-Mg-Mn and Ni-Mg-Mn layered double hydroxides and characterization of formed oxides.
[Teplotní chování Cu-Mg-Mn a Ni-Mg-Mn dvojvstvě a charakterizace tvořeného kysličníku.]
Applied Clay Science. Roč. 28, 1-4 (2005), s. 121-136. ISSN 0169-1317. E-ISSN 1872-9053
Institutional research plan: CEZ:AV0Z40320502
Keywords : Cu-Mg-Mn basic carbonates * Ni-Mg-Mn hydrotalcite
Subject RIV: CA - Inorganic Chemistry
Impact factor: 1.324, year: 2005

Thermal behaviour of synthetic Cu-Mg-Mn and Ni-Mg-Mn layered double hydroxides (LDHs) with M-II/Mg/Mn molar ratio of 1:1:1 was studied in the temperature range 200-1100 degreesC by thermal analysis (TD/DTA/EGA), powder X-ray diffraction (XRD). Raman spectroscopy, and voltammetry of microparticles. Powder XRD patterns of prepared LDHs showed characteristic hydrotalcite-like phases, but further phases were indirectly found as admixtures. The Cu-Mg-Mn precipitate was decomposed at temperatures up to ca. 200 degreesC to form an XRD-amorphous mixture of oxides. The crystallization of CuO (tenorite) and a spinel type mixed oxide of varying composition CuxMgyMnzO4 with Mn4+ was detected at 300-500 degreesC.

Teplotní chování Cu-Mg-Mn a Ni-Mg-Mn dvojvstvě bylo studováno v rozmezí 200-1100 stupňů C, charakterizace tvořeného kysličníku.
Permanent Link: http://hdl.handle.net/11104/0119820