Tunable white light emissive Mg2SiO4:Dy3+ nanophosphor: Its photoluminescence, Judd–Ofelt and photocatalytic studies. (April 2016)

• Record Type: Journal Article
• Authors: Naik, Ramachandra; Prashantha, S.C.; Nagabhushana, H.; Sharma, S.C.; Nagaswarupa, H.P.; Anantharaju, K.S.; Jnaneshwara, D.M.; Girish, K.M.
• Is Part Of: Dyes and pigments. Volume 127(2016)
• Page Start: 25
• Page End: 36
• Publication Date: 2016-04
• Subjects: Mg2SiO4:Dy3+ -- Combustion -- Nanophosphor -- Photoluminescence -- Judd–Ofelt -- CIE & CCT; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2015.12.014
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Dy 3+ doped Mg2 SiO4 nanoparticles have been synthesized by the solution combustion method at 350 °C temperature. The crystallinity and changes of lattice parameters with the incorporation of the Dy 3+ ions are studied by means of Powder X-Ray Diffraction studies. Fourier transform infrared data indicate the formation of bonds and capping of the nanoparticles. Scanning electron microscopy pictures evident for the product is porous and agglomerated. The nano size of the product is confirmed by means of transmission electron microscopy. The characteristic emission peaks and the Judd–Ofelt intensity parameters of Mg2 SiO4 :Dy 3+ nanoparticles are studied. The emission can be tuned from green (0.238, 0.348) to white (0.276, 0.347) which indicates, the prepared phosphors can be effectively used for white light emitting diodes and biosensors. Further, the degradation of dyes is found to be enhancing in the presence of Dy 3+ ions due to suppress of the e − CB and h + VB recombination. Graphical abstract: Photoluminescence, CIE and Photocatalytic mechanism of Mg2 SiO4 :Dy 3+ nanophosphor. Highlights: Nanophosphors of Dy 3+ doped Mg2 SiO4 – prepared by facile LCS method (350 °C). Characteristic emission peaks of Dy 3+ ion in the range 470–680 nm are recorded. CIE co-ordinate values shifted towards white region. Present phosphor was quite useful for display applications.