Structural and Magnetic Characterization of Nanostructured Iron Acetate
| Autor: | Glécilla Colombelli de Souza Nunes, Andrea Paesano, Flávio F. Ivashita, Valdecir Biondo, Antônio O. de Souza |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Morphology (linguistics)
010504 meteorology & atmospheric sciences Scanning electron microscope Chemistry Materials Science (miscellaneous) General Chemical Engineering Science spectroscopy mössbauer Analytical chemistry General Chemistry Activation energy 01 natural sciences Decomposition Thermogravimetry Differential scanning calorimetry termogravimetry anddifferential scanning calorimetry activation energy freeze-drying Anhydrous nanostructured iron(ii) acetate Thermal analysis QD1-999 0105 earth and related environmental sciences |
| Zdroj: | Orbital: The Electronic Journal of Chemistry, Vol 9, Iss 4, Pp 261-265 (2017) |
| ISSN: | 1984-6428 |
| Popis: | Iron(II) acetate anhydrous, (i) as received (FeAc) and (ii) processed by freeze-drying (FeAc-FD), were characterized structural, magnetic and morphologically by thermal analysis, scanning electron microscopy, thermogravimetry, differential scanning calorimetry and X-ray diffraction. As a result of these analyzes, it was found that the FeAc- FD type leaves showed a morphology with a thickness in the nanometer scale. The activation energy (Ea) for the exothermic events related to the decomposition of the above acetate was estimated in the range of 275-328 °C. Values for Ea equal to 100,225 and 127,824 kJ / mol were obtained for the FeAc and FeAc-FD, respectively. Mössbauer spectra showed as isomer shift (IS) characteristic of a Fe+3 to the FeAc-FD, and Fe+3 and Fe+2 to the FeAc. The results indicate that freeze-drying of FeAc could be used as a precursor to further processing method of decreasing the synthesis temperature. DOI: http://dx.doi.org/10.17807/orbital.v9i4.1006 |
| Databáze: | OpenAIRE |
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