Combustion synthesis and characterization of spherical α-MnMoO4 nanoparticles

In this study, α-MnMoO4 nanoparticles were prepared by combustion synthesis method. The structural, morphological and electrical characteristics of α-MnMoO4 were investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, transmission electron microscopy and impedance spectroscopy. The structural parameters were calculated from XRD pattern which confirmed the monoclinic structure of α-MnMoO4. FT-IR and Raman spectroscopy results revealed the presence of MoO4 surface functional groups. The TEM and HRTEM investigations evidenced the presence of homogeneous distribution of spherical nanoparticles and high crystallinity of α-MnMoO4. Moreover, the SAED patterns clearly revealed the polycrystalline nature of the material. The conductivity measurements had inferred the semiconducting property of α-MnMoO4 and the maximum conductivity of 1.94 × 10− 6 S/cm was attained at 540 °C.

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► The nanosized-α-MnMoO4 particles synthesized by combustion method using glycine.
► The activation energy of 9.13 kJ/mol is estimated from the plot of crystallite size against temperature.
► Spherical shape α-MnMoO4 nanoparticles are uniformly distributed in the size of 20 nm.
► α-MnMoO4 exhibits semi-conducting nature with maximum conductivity of 1.94 × 10− 6S/cm.