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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

Authors :
Aleksandra Matraszek
P. Godlewska
Jerzy Hanuza
Piotr Solarz
Irena Szczygieł
Paweł E. Tomaszewski
Marcin Sobczyk
Lucyna Macalik
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.

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