TY - JOUR
T1 - Influence of low concentration Sm doping on optical and catalytic performance of titania
AU - Kompa, Akshayakumar
AU - Kekuda, Dhananjaya
AU - Rao K, Mohan
N1 - Funding Information:
Authors would like to thank School of pure applied physics, Mahatma Gandhi University Kottayam Kerala for providing Ellipsometer facility, Dr. Sudha D. Kamath for providing photoluminescence spectrophotometer facility (DST-SERB-EMR/2017/001548) and Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal for other research facilities. Akshayakumar Kompa thank MAHE for providing Dr. T. M. A. fellowship.
Publisher Copyright:
© 2022 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/2/1
Y1 - 2023/2/1
N2 - The work focuses on exploring the effect of the concentration of Sm dopant (0.2–0.6 at.%) on structural, optical and photocatalytic properties of the spin coated titania based thin films annealed at different temperatures. The optical interpretation involves the influence of Sm doping on optical constants and luminescence behaviour of the samples. The comprehensive work on optical bandgap, Urbach energy and electron-phonon interaction strength was conducted for Sm doped samples. The optical band gap was found to increase with the increasing concentration of Sm, but decreased with high temperature annealing. Using ellipsometry measurement, refractive index of the samples was obtained. The orbital level information was gathered using X-Ray Photoelectron Spectroscopy (XPS) study with a special emphasis on the evolution of physico-chemical properties as function of Sm doping. The XPS study confirms the presence of Sm in the titania host material and it helped in estimating defects induced by Sm doping. The photocatalytic study of Sm doped titania thin films was carried out by using methylene blue (MB) and Rhodamine B (RhB) dye and we have found an enhanced photocatalytic activity for the 0.4 at.% Sm doped samples.
AB - The work focuses on exploring the effect of the concentration of Sm dopant (0.2–0.6 at.%) on structural, optical and photocatalytic properties of the spin coated titania based thin films annealed at different temperatures. The optical interpretation involves the influence of Sm doping on optical constants and luminescence behaviour of the samples. The comprehensive work on optical bandgap, Urbach energy and electron-phonon interaction strength was conducted for Sm doped samples. The optical band gap was found to increase with the increasing concentration of Sm, but decreased with high temperature annealing. Using ellipsometry measurement, refractive index of the samples was obtained. The orbital level information was gathered using X-Ray Photoelectron Spectroscopy (XPS) study with a special emphasis on the evolution of physico-chemical properties as function of Sm doping. The XPS study confirms the presence of Sm in the titania host material and it helped in estimating defects induced by Sm doping. The photocatalytic study of Sm doped titania thin films was carried out by using methylene blue (MB) and Rhodamine B (RhB) dye and we have found an enhanced photocatalytic activity for the 0.4 at.% Sm doped samples.
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U2 - 10.1016/j.ceramint.2022.09.306
DO - 10.1016/j.ceramint.2022.09.306
M3 - Article
AN - SCOPUS:85139058048
SN - 0272-8842
VL - 49
SP - 4230
EP - 4239
JO - Ceramics International
JF - Ceramics International
IS - 3
ER -