Reflux synthesis of Co3O4 nanoparticles and its magnetic characterization
2009 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, Vol. 321, no 14, 2145-2149 p.Article in journal (Refereed) Published
Co3O4 nanoparticles have been prepared for the first time via reflux method, as an alternative low-temperature high-yield process, starting from one single precursor. A plausible mechanism is suggested for the synthetic process. XRD, TEM, FTIR and VSM were used for the structural, morphological, spectroscopic, and magnetic characterization of the product respectively. X-ray diffraction line profile fitting showed that average particle size of the sample is 28 nm. Morphology of the synthesized powder was observed to be thin nanosheets with a thickness of 2-3 nm based on SEM and TEM analyses. Magnetic measurements showed a deviation of the Neel temperature from the bulk value which is attributed to the finite size effects. A loop shift with an enhanced coercivity is observed in the field-cooled hysteresis loops. The opening of the hysteresis loop reveals the existence of the spin-glass like surface spins of the Co3O4 nanoparticles.
Place, publisher, year, edition, pages
2009. Vol. 321, no 14, 2145-2149 p.
X-ray diffraction, Magnetic measurement, Chemical synthesis, Scanning, and transmission electron microscopy, Nanostructure, lithium-ion batteries, 100 degrees-c, cobalt oxide, thin-films, crystallite conversion, temperature synthesis, optical-properties, ferrous hydroxide, spray pyrolysis, aqueous-media
IdentifiersURN: urn:nbn:se:kth:diva-18372DOI: 10.1016/j.jmmm.2009.01.003ISI: 000265628000017ScopusID: 2-s2.0-65349105834OAI: oai:DiVA.org:kth-18372DiVA: diva2:336418
QC 201005252010-08-052010-08-052011-02-04Bibliographically approved