International Journal of Engineering Research

G. R. Navyashree ¹, H. Nagabhushana ², D. V. Sunitha ¹, S. Yeshodamma ¹

Affiliations
1 School of Physical Sciences, Reva University, Yelahanka, Bangalore-560064, IN
2 Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur-572103, IN

Abstract

Titanium dioxide (TiO₂) nanoparticles was synthesized by solution combustion technique using Nigella sativa, Euphorbia milii, Synadenium grantii as different fuels. The obtained products were characterized by Powder X-ray diffraction (PXRD) and Diffuse reflectance spectroscopy (DRS). The X-ray diffraction pattern was in good agreement with the standard JCPDS card No.84-1285. The crystallite size was estimated by Scherrer's method and was found to ∼10 nm. The optical band gap for TiO₂ nanoparticles synthesized using Nigella sativa, Euphorbia milii, Synadenium grantii as a fuel were found to be 3.37, 3.41 and 3.46 eV respectively.

Keywords

Nanoparticles, Plant Extracts, Band Gap.

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S. Yeshodamma ¹, D. V. Sunitha ¹, H. Nagabhushana ², G. R. Navyashree ¹, K. Hareesh ³, N. Bhoraskar ³, S. D. Dhole ³

Affiliations
1 School of Physical Sciences, Reva University, Yelahanka, Bangalore-560064, IN
2 Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur-572103, IN
3 Department of Physics, Savitribai Phule Pune University, Pune-411007, IN

Abstract

Y₂O₃:Sm³⁺ (3 mol%) nanophosphors was synthesized by solution combustion technique using Aloe Vera gel as a fuel. The pristine and E-beam irradiated samples were subjected to powder X-ray diffraction studies (PXRD). Pristine sample reveled the formation of highly crystalline cubic phase of Y₂O₃. Whereas the E-beam irradiated sample showed decrease in crystalline nature by the creation of defects. Photoluminescence (PL) spectra taken for pristine and E-beam irradiated Y₂O₃:Sm³⁺ nanophosphors showed characteristic emission peaks at 570, 608 and 656 nm corresponding to ⁴G_5/2→⁶H_J (J=5/2, 7/2, 9/2) transitions of Sm³⁺ ion respectively.

Keywords

E-Beam, Photoluminescence, Transitions.

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