Spectroscopic investigation of defects in spin coated titania based thin films for photocatalytic applications

Akshayakumar Kompa; M. G. Mahesha; Dhananjaya Kekuda; Mohan Rao K

doi:10.1016/j.jssc.2021.122488

Spectroscopic investigation of defects in spin coated titania based thin films for photocatalytic applications

Akshayakumar Kompa, M. G. Mahesha, Dhananjaya Kekuda, Mohan Rao K

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The present work focuses on Raman and photoluminescence spectroscopic study of spin coated Nd doped titania thin films annealed at 350 and 450 °C. For all the samples, the penetration depth of laser was evaluated to be about 300–350 nm. The lifetime of phonon was in the range 0.46–0.52 ps for different samples and its variation is discussed in detail. Photoluminescence (PL) spectra of Nd doped titania revealed the influence of dopant concentration on defect sites and strong emission in near infrared (NIR) region confirms Nd doping in titania matrix. The effect of Nd doping on photocatalytic behavior of titania films was studied by degrading methyl orange (MO) under UV light. The Nd doped titania thin films enhance the photocatalytic activity as compared to pristine titania. The enhancement in efficiency is correlated to the formation of surface defects.

Original language	English
Article number	122488
Journal	Journal of Solid State Chemistry
Volume	303
DOIs	https://doi.org/10.1016/j.jssc.2021.122488
Publication status	Published - 11-2021

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jssc.2021.122488

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@article{71be2f0bdcaf4e0aa185ecd83ac1dda8,

title = "Spectroscopic investigation of defects in spin coated titania based thin films for photocatalytic applications",

abstract = "The present work focuses on Raman and photoluminescence spectroscopic study of spin coated Nd doped titania thin films annealed at 350 and 450 °C. For all the samples, the penetration depth of laser was evaluated to be about 300–350 nm. The lifetime of phonon was in the range 0.46–0.52 ps for different samples and its variation is discussed in detail. Photoluminescence (PL) spectra of Nd doped titania revealed the influence of dopant concentration on defect sites and strong emission in near infrared (NIR) region confirms Nd doping in titania matrix. The effect of Nd doping on photocatalytic behavior of titania films was studied by degrading methyl orange (MO) under UV light. The Nd doped titania thin films enhance the photocatalytic activity as compared to pristine titania. The enhancement in efficiency is correlated to the formation of surface defects.",

author = "Akshayakumar Kompa and Mahesha, {M. G.} and Dhananjaya Kekuda and {Rao K}, Mohan",

note = "Funding Information: The authors thank SAIF IIT Mumbai for Raman spectrometer 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: {\textcopyright} 2021 Elsevier Inc.",

year = "2021",

month = nov,

doi = "10.1016/j.jssc.2021.122488",

language = "English",

volume = "303",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

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AU - Kompa, Akshayakumar

AU - Mahesha, M. G.

AU - Kekuda, Dhananjaya

AU - Rao K, Mohan

N1 - Funding Information: The authors thank SAIF IIT Mumbai for Raman spectrometer 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: © 2021 Elsevier Inc.

PY - 2021/11

Y1 - 2021/11

N2 - The present work focuses on Raman and photoluminescence spectroscopic study of spin coated Nd doped titania thin films annealed at 350 and 450 °C. For all the samples, the penetration depth of laser was evaluated to be about 300–350 nm. The lifetime of phonon was in the range 0.46–0.52 ps for different samples and its variation is discussed in detail. Photoluminescence (PL) spectra of Nd doped titania revealed the influence of dopant concentration on defect sites and strong emission in near infrared (NIR) region confirms Nd doping in titania matrix. The effect of Nd doping on photocatalytic behavior of titania films was studied by degrading methyl orange (MO) under UV light. The Nd doped titania thin films enhance the photocatalytic activity as compared to pristine titania. The enhancement in efficiency is correlated to the formation of surface defects.

AB - The present work focuses on Raman and photoluminescence spectroscopic study of spin coated Nd doped titania thin films annealed at 350 and 450 °C. For all the samples, the penetration depth of laser was evaluated to be about 300–350 nm. The lifetime of phonon was in the range 0.46–0.52 ps for different samples and its variation is discussed in detail. Photoluminescence (PL) spectra of Nd doped titania revealed the influence of dopant concentration on defect sites and strong emission in near infrared (NIR) region confirms Nd doping in titania matrix. The effect of Nd doping on photocatalytic behavior of titania films was studied by degrading methyl orange (MO) under UV light. The Nd doped titania thin films enhance the photocatalytic activity as compared to pristine titania. The enhancement in efficiency is correlated to the formation of surface defects.

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Spectroscopic investigation of defects in spin coated titania based thin films for photocatalytic applications

Abstract

All Science Journal Classification (ASJC) codes

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