Calcination temperature dependent structural modifications, tailored morphology and luminescence properties of MoO3 nanostructures prepared by sonochemical method

MoO3 nanoparticles were prepared by a surfactant assisted sonochemical method. Final products were calcined at 180 degrees C, 400 degrees C, and 600 degrees C resulting in the alpha-orthorhombic, beta-monoclinic, and h-hexagonal structures of MoO3, respectively. Variable morphologies were also seen from SEM images. The energy band gap of the samples was estimated to be similar to 3.60 eV from diffuse reflectance spectra using KubelkaMunk function. Photoluminescence spectra exhibited a strong emission peak at similar to 438 nm due to the hexa-coordinated [MoO6](5+)d(z)(2-) d(yz) transitions. The results show that the samples can be used as blue light emitting components of white light emitting diodes. (c) 2017 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.