Abstract
Chromium substituted cobalt ferrites CoFe2−xCrxO4 (x = 0; 1; 1.5) were synthesized through a soft chemistry method—the gluconate precursor route. The gluconate precursors were characterized by infrared spectroscopy (IR), ultraviolet–visible spectroscopy and thermal analysis. The spinel oxide powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Mössbauer spectroscopy and Brunauer–Emmett–Teller N2 adsorption–desorption analyses. XRD indicated the formation of the spinel-type phase with good crystallinity. The mean crystalline domains size decreased from 23.8 to 17.8 nm with the increase in the chromium content. SEM revealed faceted particles for which the particle sizes varied significantly with the chromium content. The chromium substituted cobalt ferrites were found to have high catalytic performance.
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Acknowledgments
Support of the EU (ERDF) and Romanian Government, allowing for the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM-Nr. 19/01.03.2009, is gratefully acknowledged. The work also benefits from the support of the “Materials Science and Advanced Characterization Methods” Programme of the “Ilie Murgulescu” Institute of Physical Chemistry, financed by the Romanian Academy. One of the authors (LD) acknowledges the financial support under the Core Program PN 10N/2017.
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Mindru, I., Gingasu, D., Diamandescu, L. et al. CoFe2−xCrxO4 ferrites: synthesis, characterization and their catalytic activity. Chem. Pap. 72, 3203–3213 (2018). https://doi.org/10.1007/s11696-018-0553-0
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DOI: https://doi.org/10.1007/s11696-018-0553-0