Volltext verfügbar nach Anmeldung bzw. im Campus-Netz.
Preparation of CuCrO nanopowders using two different chromium sources.
In: Journal of Thermal Analysis & Calorimetry, Jg. 131 (2018), Heft 1, S. 137-144
Online
academicJournal
Zugriff:
CuCrO spinel powders were synthesized starting from different chromium sources, namely (i) chromium oxide (α-CrO) and (ii) ammonium dichromate ((NH)CrO). The copper source was a Cu(II) carboxylate-type complex. The Cu(II) carboxylate complex was obtained by the redox reaction between Cu(NO)·3HO and 1,3-propanediol (1,3PG) at 130 °C. In the first case (i), we have started from a mixture of α-CrO, Cu(NO)·3HO and 1,3PG that upon heating formed the copper malonate complex, which decomposed around 220 °C forming an oxide mixture (CuO + α-CrO). In the second case (ii), (NH)CrO, Cu(NO)·3HO and 1,3PG were homogenously mixed. Heating this mixture at 130 °C resulted, in situ, in the Cu(II) complex. On controlled temperature increase, the violent decomposition of (NH)CrO took place at 180 °C along with the decomposition of the Cu(II) complex, leading to an amorphous oxide mixture of CrO and CuO. By annealing the samples in the temperature range 400-1000 °C, the spinel phase (CuCrO) was obtained in both cases: (i) at 800 °C and (ii) at 600 °C as a result of the interactions between the precursors used, when the oxide system was amorphous and highly reactive. The presence of CuCrO was highlighted by XRD and FTIR analyses. [ABSTRACT FROM AUTHOR]
Titel: |
Preparation of CuCrO nanopowders using two different chromium sources.
|
---|---|
Autor/in / Beteiligte Person: | Berei, Eniko ; Muntean, Cornelia ; Ştefănescu, Oana ; Niculescu, Mircea ; Ştefănescu, Mircea |
Link: | |
Zeitschrift: | Journal of Thermal Analysis & Calorimetry, Jg. 131 (2018), Heft 1, S. 137-144 |
Veröffentlichung: | 2018 |
Medientyp: | academicJournal |
ISSN: | 1388-6150 (print) |
DOI: | 10.1007/s10973-017-6328-y |
Schlagwort: |
|
Sonstiges: |
|