Metathesis synthesis, characterization, spectral and photoactivity studies of Ln2/3MoO4（Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Y）
来源期刊：JOURNAL OF RARE EARTHS2015年第8期
论文作者：Radha Velchuri Suresh Palla G.Ravi Naveen Kumar Veldurthi J.R.Reddy M.Vithal
文章页码：837 - 845
摘 要：Rare earth ortho-oxomolybdates of composition Ln2/3MoO 4（Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Y） were prepared by metathesis reaction. All these materials were characterized by powder X-ray diffraction, Fourier transform-infrared spectroscopy（FT-IR） and UV-Vis diffuse reflectance spectra. The Rietveld analysis of all the samples was carried out to obtain the unit cell parameters and reliability factors. All the materials were crystallized in tetragonal lattice with I41/a space group. The infrared spectra of all the samples were characterized by bands due to MoO 2–4 units. The bandgap energies of all the samples were obtained from UV-Vis DRS spectra. The luminescence spectra of Ln2/3MoO 4（Ln=Pr, Eu and Dy） showed characteristic transitions of the rare earth ions. The visible light photocatalytic activity of all the samples was studied against degradation of methylene blue.
Radha Velchuri，Suresh Palla，G.Ravi，Naveen Kumar Veldurthi，J.R.Reddy，M.Vithal
Department of Chemistry, Osmania University
摘 要：Rare earth ortho-oxomolybdates of composition Ln2/3MoO 4（Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Y） were prepared by metathesis reaction. All these materials were characterized by powder X-ray diffraction, Fourier transform-infrared spectroscopy（FT-IR） and UV-Vis diffuse reflectance spectra. The Rietveld analysis of all the samples was carried out to obtain the unit cell parameters and reliability factors. All the materials were crystallized in tetragonal lattice with I41/a space group. The infrared spectra of all the samples were characterized by bands due to MoO 2–4 units. The bandgap energies of all the samples were obtained from UV-Vis DRS spectra. The luminescence spectra of Ln2/3MoO 4（Ln=Pr, Eu and Dy） showed characteristic transitions of the rare earth ions. The visible light photocatalytic activity of all the samples was studied against degradation of methylene blue.
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