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
| Autor: | Elena. I. Sal’nikova, Yu. G. Denisenko, Oleeg. V. Andreev, Jacques K. Fatombi, Sèmiyou A. Osseni |
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| Rok vydání: | 2017 |
| Předmět: |
Lanthanide
Materials science Coprecipitation Oxygen storage Doping Nanochemistry Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences lcsh:Chemistry lcsh:QD1-999 Lanthanide oxysulfides Nanoparticles Particle size 0210 nano-technology Luminescence Lanthanide oxysulfates Reduction Nuclear chemistry |
| Zdroj: | Journal of Nanostructure in Chemistry, Vol 7, Iss 4, Pp 337-343 (2017) |
| ISSN: | 2193-8865 2008-9244 |
| Popis: | 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 µm. 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. Graphical abstract |
| Databáze: | OpenAIRE |
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