Influence of Gamma-Irradiation on Structural, Optical and Photocatalytic Performance of TiO2 Nanoparticles Under Controlled Atmospheres

The effect of gamma-rays on structural, optical and photocatalytic properties of TiO 2 nanoparticles under controlled atmospheres are studied to further improve photocatalytic performance. The sol–gel TiO 2 powders were deposited with spin-coating technique, annealed at 500°C then finally irradiated...

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Bibliographic Details
Published in:Journal of electronic materials Vol. 49; no. 3; pp. 1904 - 1921
Main Authors: Bourezgui, A., Kacem, I., Daoudi, M., Al-Hossainy, Ahmed F.
Format: Journal Article
Language:English
Published: New York Springer US 01.03.2020
Springer Nature B.V
Subjects:
Anisotropy
Atmospheres
Characterization and Evaluation of Materials
Chemistry and Materials Science
Controlled atmospheres
Degradation
Density functional theory
Electrical resistivity
Electronics and Microelectronics
Fourier transforms
Gamma rays
Instrumentation
Irradiation
Materials Science
Mathematical analysis
Methylene blue
Nanoparticles
Nanostructure
Optical and Electronic Materials
Optical properties
Photocatalysis
Pollutants
Sol-gel processes
Solid State Physics
Spectrum analysis
Spin coating
Time dependence
Titanium dioxide
optical properties
DFT
TiO
photo catalysis
Gamma ray radiation
ISSN:0361-5235, 1543-186X
Online Access:Get full text
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Summary:The effect of gamma-rays on structural, optical and photocatalytic properties of TiO 2 nanoparticles under controlled atmospheres are studied to further improve photocatalytic performance. The sol–gel TiO 2 powders were deposited with spin-coating technique, annealed at 500°C then finally irradiated by gamma-rays. The structural and optical characteristics of samples were investigated by Fourier transform infrared spectroscopy, x-ray diffraction and UV-visible spectroscopy (UV). The time-dependent density functional theory (TD-DFT) calculation are used to determine ground geometries and electronic structures of TiO 2 nanostructures. DFT calculations present an excellent conformity with experimental results, and a high anisotropy in stretched thermal and electrical conductivity TiO 2 nanostructures was found. Structural and optical results show that gamma radiation did not change the crystallinity of TiO 2 nanostructures and leads to an optical band gap reduction to 3.039 eV. The gamma radiation effect on photocatalytic performance was investigated by methylene blue degradation as a typical pollutant. Gamma radiation has been discovered to improve considerably the degradation of pollutants compared with unirradiated TiO 2 . Graphic Abstract
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ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-019-07887-z