Okba Ben Khetta
@univ-biskra.dz
Department of Material Sciences
Université de Biskra
RESEARCH, TEACHING, or OTHER INTERESTS
Surfaces, Coatings and Films, Condensed Matter Physics, Physics and Astronomy, Environmental Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scopus Publications
Abdallah Attaf, Radhia Messemeche, Hanane Saidi, Benkhetta Youcef, Mohamed Salah Aida, and Okba Benkhetta
IOS Press
Photocatalytic application has been of large interest due to its new technology for organic pollution. Among the photocatalyst, titanium dioxide thin film is known as a photocatalyst for the elimination of organic pollutants. In this research, the structural and optical properties of TiO2 thin films prepared on glass substrates were studied, using a sol-gel (spin coating) technique. TiO2 thin films were deposited with molar ratio y between [TTIP] and [AcAc] concentration, which varied from 0.5 to 2. Photocatalytic properties of TiO2 thin films are studied by using sunlight and photodegradation of methylene blue as a water pollutant evaluated until the photocatalytic process enhances with the molar ratio. Absorbance spectra were measured using a spectrophotometer. Test results showed that the photocatalytic sunlight /TiO2 thin film is a promising method for treating wastewater. The quantity of acetylacetone in the precursor solution had no significant effect on the optical and structural properties of the TiO2 thin films. Films consisted of the anatase phase, with a band gap in the range of 3.38–3.51 eV and thickness in the range of 534–618 nm. However, the molar ratio effect on photocatalytic preperties, the best photodegradation rate reaches to 94% in y = 0.66 at t = 180 min.
Radhia Messemeche, Youcef Benkhetta, Abdallah Attaf, Hanane Saidi, Mohamed Salah Aida, and Okba Ben khetta
Springer Science and Business Media LLC
Okba Ben khetta, Abdellah Attaf, Ammar Derbali, Hanane Saidi, Adel Bouhdjer, Mohamed Salah Aida, Youcef Ben khetta, Radhia Messemeche, Rahima Nouadji, Saâd Rahmane,et al.
Elsevier BV
R. Nouadji, A. Attaf, A. Derbali, A. Bouhdjer, H. Saidi, M.S. Aida, F. Zeribi, O. Benkhetta, R. Messemeche, M. Nouadji,et al.
IOS Press
In this work, we investigated the effect of the thickness on structural, morphological, optical, and electrical properties of In2O3 thin films synthesized via by sol–gel spin coating technique. The prepared samples were characterized by various techniques including X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray (EDX) spectra, UV-Vis-NIR spectrophotometer as well as the electrical measurements via the four-probe technique. The XRD analysis reveals that the films have a cubic crystalline structure, with (222) preferential orientation. The crystallite size values of the films were varied from 14 to 27 nm. The (SEM) images indicated that the homogenous and smooth surface with better adherent to the substrate surface. The EDX spectrum reveals the presence of In and O element necessary for In2O3 films for film formation. Excess of oxygen is observed due to the substrate contribution. The transmittance results exhibit that the films are highly transparent, more than 75% in the visible range from 400 nm to 800 nm is measured. The estimated band gap energy is found to increase with increasing film thickness (3.37–3.7 eV). The electrical resistivity of the In2O3 thin films substantially decreases with the increasing film thickness from 1.48×10-4 to 1.3×10-3 Ω.cm.
A. Bouhdjer, H. Saidi, A. Attaf, A. Yahia, M.S. Aida, O. Benkhetta, and L. Bouhdjer
Elsevier BV