A. Phuruangrat, T. Thongtem, S. Thongtem
Jul 29, 2009
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Journal
Journal of Alloys and Compounds
Abstract
Abstract Nanocrystalline calcium molybdate was successfully synthesized from Ca(NO 3 ) 2 and Na 2 MoO 4 in ethylene glycol using a microwave radiation method. Body-centered tetragonal structured calcium molybdate with narrow nanosized distribution was detected using XRD, SAED and TEM. A diffraction pattern was also simulated and was found to be in accordance with those obtained from the experiment and JCPDS standard. Raman and FTIR spectra show the Mo–O prominent stretching bands in the [MoO 4 ] 2− tetrahedrons at 879.59 and 743–895 cm −1 , respectively. Photoluminescence emission of CaMoO 4 was detected at 477 nm, caused by the annihilation of a self-trapped excitons from the [MoO 4 ] 2− excited complex.