Molybdenum Based Manganese Oxides as Optoelectronic Nanomaterials: Synthesis, Structural & Optical Characterization

This work reports the synthesis of molybdenum based manganese oxide nanomaterials named as (CH1-CH5) via a facile hydrothermal approach. Nanomaterials were characterized through Powder XRD, SEM, BET, UV-Vis, Photoluminescence, and FTIR analysis. Structural characterization revealed triclinic crystal structure of nanomaterials having particle sizes in the range of 23.08-52.7 nm with very low levels of microstrain levels (<0.05) and dislocation densities. Surface areas were found to be in the range of 42.37-52.32 m2/g with mesoporous structures and solid bar and cross surface morphology. Optical band gaps (Eg) calculated from absorption data was found to be in the range of 4.65-4.75 eV for direct transitions whereas 4.60-4.74 eV for indirect transitions. The Eg calculated from emission data was found to be in the range of 2.42-2.67 eV. Absorption edge broadening was investigated by urbach energy (EU) calculated to be in the range of 1.23-1.51 eV whereas fermi energy (Ef) were obtained as 4.66-4.72 eV. Refractive index (n) was calculated to be in the range of 0.13-0.21 whereas high values obtained for real and imaginary parts of dielectric constants (epsilon) indicating polarization relaxation in synthesized materials. The calculated structural and optical characteristics indicates that these materials can be potential candidates for optoelectronic and catalytic applications.