tarek_ali

Tarek T. Ali

Professor - Professor

Faculty of science

Address: Chemistry Department, Faculty of Science, Sohag University, Sohag, P.O.Box 82524, Egypt

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Antibacterial and Photocatalytic Activities of Controllable (Anatase /Rutile) Mixed Phase TiO2 Nanophotocatalyst Synthesized by Microwave- Assisted Sol-Gel Method
The idea of preparing different ratios of (anatase/rutile) TiO2 mixture has been performed by using microwave assisted sol-gel method and by applying particular concentrations of titanium (IV) isopropoxide as a single source precursor (SSP) with a constant concentration of nitric acid that has been used as structure directing agent. The effect of TiO2 composition ratio of anatase to rutile on ... Read more

Template Assisted Microwave Synthesis of rGO-ZrO2 Composites: Efficient Photocatalysts Under Visible Light
In this research, cetyltetraethyl ammonium bromide template assisted microwave procedure was utilized to synthesize reduced graphene oxide-zirconia (rGO-ZrO2) nanocomposites by varying the rGO composition (1, 2, 5 and 10 wt%). The physico-chemical characteristics of the nanocomposites were studied using X-ray diffraction (XRD), Raman, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), diffusive reflectance ultraviolet-visible (DRUV-vis), X-ray photoelectron spectroscopy (XPS) and ... Read more

Porous Fe2O3-ZrO2 and NiO-ZrO2 nanocomposites for catalytic N2O decomposition
Mesoporous Fe2O3-ZrO2 and NiO-ZrO2 nanocomposites with 10 and 20 wt% of Fe2O3 and NiO composition were prepared by modified sol-gel method. The physico-chemical characteristics of calcined nanocomposites were evaluated utilizing different techniques such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron spectroscopy, N2-physisorption, H2-temperature programed reduction, Fourier transformed infrared spectroscopy after pyridine adsorption and X-ray photoelectron spectroscopy. The ... Read more

Acidic Peptizing Agent Effect on Anatase- Rutile Ratio and Photocatalytic Performance of TiO2 Nanoparticles
TiO2 nanoparticles were synthesized from titanium isopropoxide by a simple peptization method using sulfuric, nitric, and acetic acids. The effect of peptizing acid on physicochemical and photocatalytic properties of TiO2 powders was studied. The structural properties of synthesized TiO2 powders were analyzed by using XRD, TEM, N2-physisorption, Raman, DR UV-vis, FTIR, and X-ray photoelectron spectroscopy techniques. The characterization results showed ... Read more

Fabrication, characterization and catalytic activity measurements of nanocrystalline Ag-Cr-O catalysts
This research paper describes the preparation, characterization and the hydrogen peroxide decomposition activity of a series of nano-crystalline Ag-Cr-O catalysts obtained by calcining a parent mixture of silver aetate and ammonium dichromate. This parent has been calcined for 1 h, in air, at the temperature range of200–700 °C. The characterization of the nano-crystalline Ag-Cr-O catalysts was performed using a series ... Read more

2018 | Keywords Samarium Oxidation,
Nanosized samarium modified Au-Ce0.5Zr0.5O2 catalysts for oxidation of benzyl alcohol
In this study, Au-Ce0.5Zr0.5O2 (Au-CeZr) and Sm modified AuCeZr catalysts were synthesized by organic deposition-precipitation method using gold acetate and samarium acetate as Au and Sm precursors and tetrapropylammonium hydroxide as precipitating agent. The synthesized nanocrystalline Au-CeZr and Sm modified Au-CeZrmaterials found be effective catalysts for benzyl alcohol oxidation at low reaction temperatures. The catalystswere characterized by XRD, SEM, TEM, ... Read more

Effects of Nd-, Pr-, Tb- and Y-doping on the structural, textural, electrical and N2O decomposition activity of mesoporous NiO nanoparticles
Recently, nickel oxide, NiO, promoted with various dopants showed an interesting activity behavior inN2O direct decomposition. In this paper, the activity of a series of rare earth (Nd, Pr, Tb and Y) doped NiOcatalysts was investigated for this reaction. These catalysts have been prepared by the calcination of theircorresponding oxalate mixtures, which have been synthesized via the microwave-assisted precipitationroute using ... Read more

Influence of preparation conditions on the catalytic activity of high surface
High surface area SiO2 samples were synthesized by one-step hydrolysis and co-condensation at different pH (between 3.0 and 6.0) using tetraethyl orthosilicate as the Si source and formamide as the drying additive. The effects of the presence of H2O, formamide and NH3 solution on the hydrophobic nature, textural properties and catalytic functionality of SiO2 were investigated. The physico-chemical properties of ... Read more

2016 | Keywords Lithium zirconate Biodiesel,
Effect of preparation conditions on structural and catalytic properties of lithium zirconate
Inorganic (inorg) and organic (org) routes with acid (A) and base (B) hydrolyzing agents were utilized to synthesize lithium zirconate (LiZr) nanomaterials. The effect exerted by the nature of hydrolyzing agent and synthesis route on the morphology and structural properties of the samples was studied by X-ray diffraction, Raman spectroscopy, TEM, XPS, N2-adsorption and CO2-TPD techniques. The characterization results showed ... Read more

Physico-Chemical and Catalytic Properties of Mesoporous CuO-ZrO2 Catalysts
Mesoporous CuO-ZrO2 catalysts were prepared and calcined at 500 C. The performance of the synthesized catalysts for benzylation of benzene using benzyl chloride was studied. The bare support (macroporous ZrO2) offered 45% benzyl chloride conversion after reaction time of 10 h at 75 C. Significant increase in benzyl chloride conversion (98%) was observed after CuO loading (10 wt. %) on ... Read more