Abstract
Copper cobalt ferrite nanoparticles are prepared through two coprecipitation methods as well as two sol–gel auto combustion methods, and a comparison is made by studying the structural properties of nanoparticles produced. The effect of heat treatment is studied by calcining the obtained samples at two different temperatures. The obtained nanoparticles are characterized by different standard techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), and surface area and pore diameter studies. XRD patterns reveal the spinel structure of the prepared nanocomposites. FTIR spectra confirm the spinel structure by revealing two characteristic absorption bands in the range 400–450 and 550–600 cm−1 respectively due to the vibrations of oxide ions with the divalent and trivalent metal ions in octahedral and tetrahedral sites in the spinel lattice. TEM images disclose the spherical nature of the particles. The acid site distribution of the prepared samples quantified using temperature-programmed desorption (TPD) of ammonia depict the presence of moderate and strong acid sites. Temperature-programmed reduction (TPR) experiments suggest the potential use of cobalt copper nanoferrites in catalytic applications.
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