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Optical and structural characterisation of pure and Pr3+ doped LaPO4 and CePO4 nanocrystals
Optical and structural characterisation of pure and Pr3+ doped LaPO4 and CePO4 nanocrystals
- Source :
- Journal of Alloys and Compounds. 509:7458-7465
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- The rod- and stick-shaped nanocrystalline cerium and lanthanum orthophosphates, pure and Pr 3+ doped, have been synthesised by the hydrothermal method in acidic (pH 1) or alkaline (pH 11) environment. Subsequent calcination of as-obtained powders at different temperatures, 500 and 900 °C, led to the formation of hexagonal and monoclinic phases, respectively. The hexagonal phase at room temperature has been identified as hydrated orthophosphate with zeolite water inside the channels of the structure. The monoclinic phase is free of water. The average grain size is about 12–30 nm depending on the calcination temperature and preparation conditions. The structural, morphological and optical (vibrational and luminescent) properties have been characterised and their changes due to the temperature and different acidity in the starting materials have been studied.
- Subjects :
- Materials science
Mechanical Engineering
Inorganic chemistry
Metals and Alloys
Hexagonal phase
chemistry.chemical_element
Nanocrystalline material
law.invention
Cerium
chemistry
Chemical engineering
Mechanics of Materials
law
Phase (matter)
Materials Chemistry
Lanthanum
Hydrothermal synthesis
Calcination
Monoclinic crystal system
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 509
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........8958bc79b4bc2767ba928edbc817ec2b
- Full Text :
- https://doi.org/10.1016/j.jallcom.2011.04.077