Okba Ben Khetta

RESEARCH, TEACHING, or OTHER INTERESTS

Surfaces, Coatings and Films, Condensed Matter Physics, Physics and Astronomy, Environmental Engineering

Scopus Publications

Enhanced photocatalytic degradation of Rhodamine B by (Mg/Ta): doped Bi<inf>4</inf>Ti<inf>3</inf>O<inf>12</inf> catalyst under sunlight irradiation
Lakhdar Smaili, Hayet Menasra, Chaima Benbrika, Okba Ben Khetta, Zelikha Necira, and Karima Bounab
Springer Science and Business Media LLC



Characterization and photocatalytic activity of different molar ratios of TiO<inf>2</inf>thin films prepared by Sol-Gel process
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.


Photocatalytic mechanisms reactions of gallium doped TiO<inf>2</inf> thin films synthesized by sol gel (spin coating) in the degradation of methylene blue (MB) dye under sunlight irradiation
Radhia Messemeche, Youcef Benkhetta, Abdallah Attaf, Hanane Saidi, Mohamed Salah Aida, and Okba Ben khetta
Springer Science and Business Media LLC



Precursor concentration effect on the physical properties of transparent titania (Anatase-TiO<inf>2</inf>) thin films grown by ultrasonic spray process for optoelectronics application
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



Film thickness effect on structural, optical and electrical properties of indium oxide (In<inf>2</inf>O<inf>3</inf>) thin films grown via sol-gel method
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.


Effects of lattice mismatches in In<inf>2</inf>O<inf>3</inf>/substrate structures on the structural, morphological and electrical properties of In<inf>2</inf>O<inf>3</inf> films
A. Bouhdjer, H. Saidi, A. Attaf, A. Yahia, M.S. Aida, O. Benkhetta, and L. Bouhdjer
Elsevier BV

RECENT SCHOLAR PUBLICATIONS

Study of dopant concentration effect on the physical properties of spin coated anatase TiO 2: Al 3+ thin films
S Chala, H Saidi, A Derbali, A Attaf, MS Aida, A Guettaf, R Messemeche, ...
2024



Enhanced photocatalytic degradation of Rhodamine B by (Mg/Ta): doped Bi₄Ti₃O₁₂ catalyst under sunlight irradiation
L Smaili, H Menasra, C Benbrika, O Ben Khetta, Z Necira, K Bounab
Reaction Kinetics, Mechanisms and Catalysis 136 (6), 3257-3269 2023



Characterization and photocatalytic activity of different molar ratios of TiO 2 thin films prepared by Sol-Gel process
A Attaf, R Messemeche, H Saidi, B Youcef, MS Aida, O Ben khetta
Main Group Chemistry 22 (1), 55- 65 2023



Photocatalytic mechanisms reactions of gallium doped TiO₂ thin films synthesized by sol gel (spin coating) in the degradation of methylene blue (MB) dye under
R Messemeche, Y Benkhetta, A Attaf, H Saidi, MS Aida, O Ben Khetta
Reaction Kinetics, Mechanisms and Catalysis 135 (5), 2735-2747 2022



Precursor concentration effect on the physical properties of transparent titania (Anatase-TiO2) thin films grown by ultrasonic spray process for optoelectronics application
O Ben khetta, A Attaf, A Derbali, H Saidi, A Bouhdjer, MS Aida, ...
Optical Materials 132, 112790 2022



Film thickness effect on structural, optical and electrical properties of indium oxide (In₂O₃) thin films grown via sol-gel method
R Nouadji, A Attaf, A Derbali, A Bouhdjer, H Saidi, MS Aida, F Zeribi, ...
Main Group Chemistry 20 (4), 513-527 2021



Effects of lattice mismatches in In2O3/substrate structures on the structural, morphological and electrical properties of In2O3 films
A Bouhdjer, H Saidi, A Attaf, A Yahia, MS Aida, O Benkhetta, L Bouhdjer
Surfaces and Interfaces 20, 100579 2020



Surfaces and Interfaces
A Bouhdjer, H Saidi, A Attaf, A Yahia, MS Aida, O Benkhetta, L Bouhdjer

MOST CITED SCHOLAR PUBLICATIONS

Enhanced photocatalytic degradation of Rhodamine B by (Mg/Ta): doped Bi₄Ti₃O₁₂ catalyst under sunlight irradiation
L Smaili, H Menasra, C Benbrika, O Ben Khetta, Z Necira, K Bounab
Reaction Kinetics, Mechanisms and Catalysis 136 (6), 3257-3269 2023
Citations: 8



Precursor concentration effect on the physical properties of transparent titania (Anatase-TiO2) thin films grown by ultrasonic spray process for optoelectronics application
O Ben khetta, A Attaf, A Derbali, H Saidi, A Bouhdjer, MS Aida, ...
Optical Materials 132, 112790 2022
Citations: 8



Film thickness effect on structural, optical and electrical properties of indium oxide (In₂O₃) thin films grown via sol-gel method
R Nouadji, A Attaf, A Derbali, A Bouhdjer, H Saidi, MS Aida, F Zeribi, ...
Main Group Chemistry 20 (4), 513-527 2021
Citations: 8



Photocatalytic mechanisms reactions of gallium doped TiO₂ thin films synthesized by sol gel (spin coating) in the degradation of methylene blue (MB) dye under
R Messemeche, Y Benkhetta, A Attaf, H Saidi, MS Aida, O Ben Khetta
Reaction Kinetics, Mechanisms and Catalysis 135 (5), 2735-2747 2022
Citations: 5



Effects of lattice mismatches in In2O3/substrate structures on the structural, morphological and electrical properties of In2O3 films
A Bouhdjer, H Saidi, A Attaf, A Yahia, MS Aida, O Benkhetta, L Bouhdjer
Surfaces and Interfaces 20, 100579 2020
Citations: 5



Characterization and photocatalytic activity of different molar ratios of TiO 2 thin films prepared by Sol-Gel process
A Attaf, R Messemeche, H Saidi, B Youcef, MS Aida, O Ben khetta
Main Group Chemistry 22 (1), 55- 65 2023
Citations: 2