Structural and optical properties of Mg??O-4 prepared by mechanochemical technique

MgMoO4 with hexagonal particles were prepared by combining high energy ball milling with heat treatment technique. The influence of the mechanochemical activation/heat-treatment on the phase, structural and morphology transformation were investigated by X-ray powder diffraction analysis (XRD), infrared spectroscopy (IR), differential scanning calorimetry (DSC), particle size distribution (PSD) and scanning electron microscope (SEM). Optical properties of the final product were studied by UV-Vis and photoluminescence (PL) measurements. Mechanochemical activation of the initial oxides for 10 h ball milling leads to a full amorphization of MoO3, only. The heat-treatment at different temperatures after 10 h milling time results to the phase formation of MgMoO4. The reaction started at 400 ?C for 5 h and completed at 800 ?C for 5 h. The calculated energy band gap value as prepared MgMoO4 is 2.03 eV and exhibits photoluminescence emission above 600 nm. The CIE chromaticity coordinates (x = 0.53 and y = 0.43) were found to lie in the orange region.

Automated summary

MgMoO4 with hexagonal particles was prepared by combining high energy ball milling with heat treatment technique. The mechanochemical activation/heat-treatment influenced the phase, structural and morphology transformation, and the optical properties of the final product were studied. The calculated energy band gap value of prepared MgMoO4 is 2.03 eV with photoluminescence emission above 600 nm.