Metathesis synthesis, characterization, spectral and photoactivity studies of Ln_(2/3)MoO_4(Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Y)

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英文篇名：Metathesis synthesis, characterization, spectral and photoactivity studies of Ln_(2/3)MoO_4(Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Er and Y) 作者：Radha ; Velchuri ; Suresh ; Palla ; G.Ravi ; Naveen ; Kumar ; Veldurthi ; J.R.Reddy ; M.Vithal 英文作者：Radha Velchuri;Suresh Palla;G.Ravi;Naveen Kumar Veldurthi;J.R.Reddy;M.Vithal;Department of Chemistry, Osmania University; 英文关键词：metathesis;;X-ray diffraction;;IR spectroscopy;;UV-Vis spectroscopy;;photodegradation;;rare earths 中文刊名：YXTB 英文刊名：稀土学报(英文版) 机构：Department of Chemistry, Osmania University; 出版日期：2015-08-15 出版单位：Journal of Rare Earths 年：2015 期：v.33 基金：supported by Council of Scientific and Industrial Research(CSIR),New Delhi 语种：英文; 页：YXTB201508009 页数：9 CN：08 ISSN：11-2788/TF 分类号：55-63

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.
        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.

引文

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