Comparison on effect of EDTA and citrate mediated on luminescence property of Eu3+ doped YPO4 nanoparticles

Abstract

Nanoparticles of Eu³⁺ doped YPO₄ have been prepared by co-precipitation method. The structure, morphology, composition and photoluminescence were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), IR Spectroscopy, and Scanning electron microscopy (SEM) and Photoluminescence spectroscopy (PL). In this method EG was used as a solvent, tri sodium citrate dihydrate and EDTA were used as a complexing agent. X-ray diffraction results show that the nanoparticles are crystalline in tetragonal structure and the presence of two phases, tetragonal and hexagonal phase for citrate mediated and EDTA complexed nanoparticles. The SEM image shows spherical nanoparticles which are non-agglomerated and highly dispersible in water. With the addition of citrate and EDTA, there is a slightly shift towards the lower wavelength in emission peaks. A broad peak at ̴250 nm is observed due to the EuO charge transfer band in the excitation spectra. Emission intensity decreases with complexing agent because of decrease of particle size as well as decrease of number of Eu³⁺ activators per unit volume. The emission spectrum of Eu³⁺doped YPO₄ nanoparticles clearly shows f–f transitions of Eu³⁺.