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Title: Enhanced photocatalytic degradation of methylene blue dye under UV-sunlight irradiation by cesium doped chromium oxide thin films

Abstract

Highlights: • Cs doped thin films has been prepared by the low- cost spray pyrolysis technique. • Enhanced photocatalytic activity of Cr2O3 thin films for MB photogegradation(MB) dye was achieved through Cs doping. • 6 % Cs doped Cr{sub 2}O{sub 3} thin film photocatalyst with the merits of low band gap and more oxygen vacancies, exhibits the highest sun-light photocatalytic activity. • High photostability and recyclability was achieved under sun-light irradiation. - Abstract: The present contribution highlights the photocatalytic degradation of methylene blue dye over chromium oxide Cr{sub 2}O{sub 3} thin films based photocatalysts illuminated by ultraviolet and sunlight. Cr{sub 2}O{sub 3} photocatalyst was synthesized as thin film by the spray pyrolysis method on glass substrate at temperature of 350 °C. The physical properties of the thin films were studied by X-ray diffraction, scanning electron microscopy (SEM), infrared spectroscopy (IR), Raman spectroscopy, photoluminescence (PL) probing and UV–vis spectroscopy. XRD results showed that all samples were well crystallized with rhomoboedric curudum structure. Emissions of all films have been observed in visible region at 325 nm excitation. UV–vis-NIR spectrophotometry analysis showed that the band gap energy value of chromium oxide is shortened with cesium doping. Results indicate that both the cesium dopingmore » and the introduction of oxygen vacancies promote good photocatalytic activity of Cs doped Cr{sub 2}O{sub 3} thin films under sunlight for MB degradation.« less

Authors:
 [1];  [2]; ; ;  [1]
  1. Unité de Physique des Dispositifs a Semi-Conducteurs, Faculté des Sciences de Tunis, Tunis El Manar University, 2092 Tunis (Tunisia)
  2. (Tunisia)
Publication Date:
OSTI Identifier:
22730444
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CATALYSTS; CESIUM; CHROMATES; CHROMIUM OXIDES; DOPED MATERIALS; INFRARED SPECTRA; IRRADIATION; METHYLENE BLUE; OXIDATION; PHOTOCATALYSIS; PHYSICAL PROPERTIES; RAMAN SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; THIN FILMS; ULTRAVIOLET RADIATION; X-RAY DIFFRACTION

Citation Formats

Larbi, T., E-mail: l07tarek@yahoo.fr, Department of Physics, Faculty of Sciences of Gafsa, 2112 Gafsa, Amara, M. A., Ouni, B., and Amlouk, M.. Enhanced photocatalytic degradation of methylene blue dye under UV-sunlight irradiation by cesium doped chromium oxide thin films. United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.07.024.
Larbi, T., E-mail: l07tarek@yahoo.fr, Department of Physics, Faculty of Sciences of Gafsa, 2112 Gafsa, Amara, M. A., Ouni, B., & Amlouk, M.. Enhanced photocatalytic degradation of methylene blue dye under UV-sunlight irradiation by cesium doped chromium oxide thin films. United States. doi:10.1016/J.MATERRESBULL.2017.07.024.
Larbi, T., E-mail: l07tarek@yahoo.fr, Department of Physics, Faculty of Sciences of Gafsa, 2112 Gafsa, Amara, M. A., Ouni, B., and Amlouk, M.. Wed . "Enhanced photocatalytic degradation of methylene blue dye under UV-sunlight irradiation by cesium doped chromium oxide thin films". United States. doi:10.1016/J.MATERRESBULL.2017.07.024.
@article{osti_22730444,
title = {Enhanced photocatalytic degradation of methylene blue dye under UV-sunlight irradiation by cesium doped chromium oxide thin films},
author = {Larbi, T., E-mail: l07tarek@yahoo.fr and Department of Physics, Faculty of Sciences of Gafsa, 2112 Gafsa and Amara, M. A. and Ouni, B. and Amlouk, M.},
abstractNote = {Highlights: • Cs doped thin films has been prepared by the low- cost spray pyrolysis technique. • Enhanced photocatalytic activity of Cr2O3 thin films for MB photogegradation(MB) dye was achieved through Cs doping. • 6 % Cs doped Cr{sub 2}O{sub 3} thin film photocatalyst with the merits of low band gap and more oxygen vacancies, exhibits the highest sun-light photocatalytic activity. • High photostability and recyclability was achieved under sun-light irradiation. - Abstract: The present contribution highlights the photocatalytic degradation of methylene blue dye over chromium oxide Cr{sub 2}O{sub 3} thin films based photocatalysts illuminated by ultraviolet and sunlight. Cr{sub 2}O{sub 3} photocatalyst was synthesized as thin film by the spray pyrolysis method on glass substrate at temperature of 350 °C. The physical properties of the thin films were studied by X-ray diffraction, scanning electron microscopy (SEM), infrared spectroscopy (IR), Raman spectroscopy, photoluminescence (PL) probing and UV–vis spectroscopy. XRD results showed that all samples were well crystallized with rhomoboedric curudum structure. Emissions of all films have been observed in visible region at 325 nm excitation. UV–vis-NIR spectrophotometry analysis showed that the band gap energy value of chromium oxide is shortened with cesium doping. Results indicate that both the cesium doping and the introduction of oxygen vacancies promote good photocatalytic activity of Cs doped Cr{sub 2}O{sub 3} thin films under sunlight for MB degradation.},
doi = {10.1016/J.MATERRESBULL.2017.07.024},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 95,
place = {United States},
year = {2017},
month = {11}
}