Indian Journal of Pure and Applied Physics

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Enhanced Luminescence and Photocatalytic Activity of the Monovalent Sodium (Na+) Co-Doped MgAl2O4: Eu3+ Nanostructures


Affiliations
1 Department of Physics, Mirza Ghalib College, Gaya, Bihar 823 001, India
2 Department of Physics, A.S (PG) College Mawana, Meerut 250 401, India
 

In the present work, monovalent sodium (Na+) co-doped MgAl2O4: Eu3+ photocatalyst was prepared bya combustion method followed by annealing at 1000 °. The doping of trivalent Eu3+ ions into a host MgAl2O4 with divalent cations leads to luminescence quenching and hence needs charge compensation to control the quenching, which was systematically studied by powder X-ray diffraction (PXRD), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and X-ray photoelectron spectroscopy (XPS) etc. The PL spectra of doped and co-doped samples exhibit sharp peaks around 580, 592, 611, 628 and 692 nm associated to the 5D0 → 7 Fj (j = 1–4) transitions of the Eu3+ ions, respectively. The interplay of Na+ and Eu3+ ions in the host MgAl2O4 lattice appears to be an effective charge compensation mechanism that achieve better crystal quality and enhanced red luminescence of such co-doped particles. In addition, we studied the photocatalytic activity of all the prepared photocatalysts. Specifically, Na+ co-doped MgAl2O4: Eu3+ photocatalyst revealed the enhanced photocatalytic activity with photodegradation efficiency 82% under visible light irradiation.

Keywords

Luminescence, Photocatalytic Activity, Diffuse Reflectance Spectroscopy, XPS.
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  • Enhanced Luminescence and Photocatalytic Activity of the Monovalent Sodium (Na+) Co-Doped MgAl2O4: Eu3+ Nanostructures

Abstract Views: 99  |  PDF Views: 43

Authors

Mohd Faizan
Department of Physics, Mirza Ghalib College, Gaya, Bihar 823 001, India
M. Naseem Siddique
Department of Physics, A.S (PG) College Mawana, Meerut 250 401, India
Sachin Kumar
Department of Physics, A.S (PG) College Mawana, Meerut 250 401, India

Abstract


In the present work, monovalent sodium (Na+) co-doped MgAl2O4: Eu3+ photocatalyst was prepared bya combustion method followed by annealing at 1000 °. The doping of trivalent Eu3+ ions into a host MgAl2O4 with divalent cations leads to luminescence quenching and hence needs charge compensation to control the quenching, which was systematically studied by powder X-ray diffraction (PXRD), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) and X-ray photoelectron spectroscopy (XPS) etc. The PL spectra of doped and co-doped samples exhibit sharp peaks around 580, 592, 611, 628 and 692 nm associated to the 5D0 → 7 Fj (j = 1–4) transitions of the Eu3+ ions, respectively. The interplay of Na+ and Eu3+ ions in the host MgAl2O4 lattice appears to be an effective charge compensation mechanism that achieve better crystal quality and enhanced red luminescence of such co-doped particles. In addition, we studied the photocatalytic activity of all the prepared photocatalysts. Specifically, Na+ co-doped MgAl2O4: Eu3+ photocatalyst revealed the enhanced photocatalytic activity with photodegradation efficiency 82% under visible light irradiation.

Keywords


Luminescence, Photocatalytic Activity, Diffuse Reflectance Spectroscopy, XPS.

References