Nd-doped calcium molybdate core and particles: synthesis, optical and photoluminescence studies

被引：28
作者：
Ansari, Anees A. [1 ]
Alam, Manawwer [2 ]
Parchur, A. K. [3 ]
机构：
[1] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh 11451, Saudi Arabia
[2] King Saud Univ, Coll Sci, Res Ctr, Riyadh 11451, Saudi Arabia
[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2014年 / 116卷 / 04期
关键词：
LUMINESCENCE PROPERTIES; SHELL NANOPARTICLES; CONVERSION; GROWTH; GREEN; FACILE;
D O I：
10.1007/s00339-014-8308-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页码：1719 / 1728
页数：10
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