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Nd-doped calcium molybdate core and particles: synthesis,optical and photoluminescence studies |
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| Authors: | Anees A Ansari Manawwer Alam A K Parchur |
| Institution: | 1. King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia 2. Research Center, College of Science, King Saud University, P.O. Box 2455, Riyadh, Saudi Arabia 3. Department of Physics, Banaras Hindu University, Varanasi, 221005, India |
| Abstract: | CaMoO4:Nd (core), CaMoO4:Nd@CaMoO4 and CaMoO4:Nd@CaMoO4@SiO2 core–shell nanoparticles were synthesized using polyol method under urea hydrolysis. X-ray diffraction and thermogravimetric analysis were employed to examine the structural and thermal properties of the as-prepared core and core–shell nanoparticles. Optical properties of core and core–shell nanoparticles were observed to investigate the influence of surface coating on the spectra of as-prepared nanomaterials in terms of ultraviolet/visible (UV-Vis) absorbance, FTIR, Raman and emission spectra. The optical band gap energy calculated from the UV-Vis absorption spectrum for CaMoO4:Nd, CaMoO4:Nd@CaMoO4 and CaMoO4:Nd@CaMoO4@SiO2 nanoparticles was 3.09, 2.06 and 1.26 eV, respectively. The photoluminescence spectra of the samples showed broad charge transfer emission band of MoO4]2? along with sharp transitions of neodymium ion in the visible and near infrared regions, respectively. |
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