NDLI: Nucleation sequence on the cation exchange process between Y0.95Eu0.05PO4 and CePO4 nanorods

Content Provider	Royal Society of Chemistry (RSC)
Author	Vatsa, Rajesh Kumar Sudarsan, Vasanthakumaran Sakuntala, Tyagarajan Vinu, Ajayan Gulnar, Abdul Karim Gautam, Ujjal Kumar Tyagi, Awesh Kumar
Copyright Year	2010
Abstract	Nanorods of Y0.95Eu0.05PO4@CePO4 (Y0.95Eu0.05PO4 phase was nucleated first and then a CePO4 phase was nucleated) and CePO4@Y0.95Eu0.05PO4 (CePO4 phase was nucleated first and then Y0.95Eu0.05PO4 phase was nucleated) were prepared at a relatively low temperature of 140 °C in ethylene glycol medium. Based on XRD, TEM and Raman studies it has been inferred that Y0.95Eu0.05PO4@CePO4 sample consists of a mixture of bigger (length around 800–1000 nm and width around of 80–100 nm) and smaller (length around 70–100 nm and width around 10–20 nm) nanorods, having monoclinic CePO4 and tetragonal YPO4 structure, whereas CePO4@Y0.95Eu0.05PO4 sample consists of mainly small nanorods having a single phase CePO4 structure. From the detailed luminescence studies it has been established that there exists significant incorporation of Y3+/Eu3+ ions in the CePO4 phase in CePO4@Y0.95Eu0.5PO4 sample. This has been attributed to the cation exchange taking place between Ce3+ ions in CePO4 host and Eu3+ and Y3+ ions in solution during the synthesis stage. Unlike this, such an exchange is not possible for Y0.95Eu0.05PO4@CePO4 sample synthesized under identical conditions due to the higher solubility product (Ksp) value of YPO4 compared to CePO4. Incorporation of Eu3+ in the CePO4 lattice of CePO4@Y0.95Eu0.5PO4 sample is confirmed by the significant reduction in the lifetime of 5D0 level of Eu3+ and the luminescence intensity from Eu3+, arising due to the electron transfer between the Ce3+/Ce4+ and Eu3+/Eu2+ species. These results are further supported by the non-radiative decay rates and quantum yields calculated from the emission spectrum.
Starting Page	2847
Ending Page	2854
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	2
Issue Number	12
Journal	Nanoscale
DOI	10.1039/c0nr00334d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Ethylene glycol Transmission electron microscopy Solubility equilibrium Monoclinic crystal system Tetragonal crystal system Luminescence Ion Raman Emission spectrum Quantum tunnelling Crystal structure
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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