Title of article :
Synthesis and characterization of Ln2O2SO4 (Ln = Gd, Ho, Dy and Lu) nanoparticles obtained by coprecipitation method and study of their reduction reaction under H2 flow
Author/Authors :
Osseni, Se`miyou. A Department of Chemistry - Faculty of Sciences and Technology of Natitingou - UNSTIM - Abomey, Benin , Denisenko, Yu. G Tyumen State University, Russia , Fatombi, Jacques. K Laboratory of Water Chemistry and Environment-ENS - UNSTIM - Abomey, Benin , Sal’nikova, Elena. I Tyumen State University, Russia , Andreev, Oleeg. V Tyumen State University, Russia
Abstract :
We have proposed an optimized homogeneous
precipitation method for the synthesis of spherical and
well-dispersed pure Ln2O2SO4 (Ln = Gd, Ho, Dy and Lu)
nanoparticles (NPs) using synthesized lanthanide sulfates
and urea as starting materials. Ln2O2SO4 NPs can be easily
transformed to Ln2O2S by reduction under H2 flow at
650 C for Gd, Dy and Ho whereas the reduction with Lu
gave only Lu2O3. Particle size was between 500 nm and
3.5 lm. This reduction method allows to obtain Ln2O2S
without using H2S which is highly toxic and uncomfortable
gas. Ln2O2SO4/Ln2O2S synthetized can be used for
release and oxygen storage or doped with luminescent
centers for multimodal medical imaging applications.
Keywords :
Coprecipitation , Lanthanide oxysulfates , Lanthanide oxysulfides , Nanoparticles , Reduction
