Structural and Magnetic Characterization of Nanostructured Iron Acetate

• Main Authors: Antônio Oliveira de Souza, Valdecir Biondo, Flávio Francisco Ivashita, Glécilla Colombelli de Souza Nunes, Andrea Paesano Jr
• Format: Article
• Language: English
• Published: Universidade Federal de Mato Grosso do Sul 2017-10-01
• Series: Orbital: The Electronic Journal of Chemistry
• Subjects: activation energy; freeze-drying; nanostructured iron(ii) acetate; termogravimetry anddifferential scanning calorimetry; spectroscopy mössbauer.
• Online Access: http://orbital.ufms.br/index.php/Chemistry/article/view/1006
• ISSN: 1984-6428

<p class="TTPAbstract">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 (E_a) for the exothermic events related to the decomposition of the above acetate was estimated in the range of 275-328 °C. Values for E_a ​​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.</p><p class="TTPAbstract"> </p><p class="TTPAbstract">DOI: <a href="http://dx.doi.org/10.17807/orbital.v9i4.1006">http://dx.doi.org/10.17807/orbital.v9i4.1006</a></p>