ahmedabudief

Prof. Ahmed Mohamed Abu-Dief

Professor - Professor of Physical and Inorganic Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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Publications Which contain the keyword: TEM

Effect of chromium substitution on the structural and magnetic properties of nanocrystalline zinc ferrite

2018-09-11 14:58:39 Keywords XRD, SEM, TEM, Nano structures, Chemical synthesis, EDAX, Rietveld analysis, Magnetometer,
Effect of chromium substitution on the structural and magnetic properties of nanocrystalline zinc ferrite
Single-phase Cr doped zinc ferrites have been synthesized by hydrothermal method. The crystal structure, microstructure, crystallite size and distribution, composition and magnetic properties of the synthesized nanoparticles were determined using X-ray powder diffraction, electron microscopies and vibrating sample magnetometry. Powders are composed of ultrafine spherical nanoparticles with a highly homogeneous elemental composition. The nanoparticles have partially inversed cubic spinel structure ... Read more

Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation

2018-09-11 14:54:26 Keywords TOF, TON, IR, TGA, Hydrogen peroxide, Catalytic activity, Density Functional Theory, Benzyl alcohol, TEM, Cu(II) Schiff base complexes, NMR,
Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation
In the present contribution, some novel Cu(II) complexes were synthesized from tri- and tetradentate imine ligands. All the prepared compounds were elucidated by different physicochemical methods. Density Functional Theory calculations were carried out to explain the equilibrium geometry of the bsisnph and npisnph ligands and their Cu(II) complexes. Interaction of the synthesized ligands with Cu(II) affords nano-sized particles via TEM. ... Read more

Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)

2018-09-11 15:35:36 Keywords TEM, XRD, Removal, Lead, Biosorbent, Kinetic parameters, Biosorption capacities, Delonix regia pod,
Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)
The removing of toxic heavy metals from aqueous solution by agricultural biosorbents was investigated by studying the effect of nano sized (Delonix regia) and chemically modified biosorbent citric acid Delonix regia (CADR) for removing of Pb2+ ions. TEM, XRD and EDS, FT-IR, SEM methods were used for characterizing the biosorbent(Delonix regia). The effect of contact time, pH,temperature, dosage of biosorbent, ... Read more

CuFe2O4 nanoparticles: an efficient heterogeneous magnetically separable catalyst for synthesis of some novel propynyl-1H-imidazoles derivatives

2018-09-11 16:39:44 Keywords superparamagnetic materials, TEM, non-chromatographic methods, 5-Tetrasubstituted imida, recovered catalyst, efficient catalyst , Magnetic CuFe2O4 nanoparticles,
CuFe2O4 nanoparticles: an efficient heterogeneous magnetically separable catalyst for synthesis of some novel propynyl-1H-imidazoles derivatives
The non-toxic magnetic CuFe2O4 nanoparticles have been synthesized, characterized, and used as an efficient catalyst for synthesis of new derivatives for 1,2,4,5-tetrasubstituted imidazoles in excellent yields. The synthesized compounds work-up easy and purification of products are performed without chromatographic methods. The catalyst can be recovered for the subsequent reactions and reused without any appreciable loss. Read more

Magnetic NiFe2O4 nanoparticles: efficient, heterogeneous and reusable catalyst for synthesis of acetylferrocene chalcones and their anti‐tumour activity

2018-09-11 14:11:35 Keywords anti-tumour activity, chalcone derivatives, acetylferrocene, recovered catalyst, efficient catalyst , magnetic NiFe2O4nanoparticles, TEM, SEM-EDX,
Magnetic NiFe2O4 nanoparticles: efficient, heterogeneous and reusable catalyst for synthesis of acetylferrocene chalcones and their anti‐tumour activity
A robust synthesis of magnetic NiFe2O4 nanoparticles via a hydrothermal technique was investigated. The prepared magnetic NiFe2O4 nanoparticles were characterized using powder X‐ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy (TEM), high‐resolution TEM, energy‐dispersive X‐ray spectroscopy, thermogravimetric analysis, infrared spectroscopy and vibrating sample magnetometry. XRD and TEM analyses confirmed the formation of single‐phase ultrafine nickel ferrite nanoparticles with highly ... Read more

Hydrothermal preparation and characterization of ZnFe2O4 magnetic nanoparticles as catalyst for the synthesis of multi‐substituted imidazoles

2018-09-04 06:29:35 Keywords ZnFe 2O 4 nanoparticles, superparamagnetic materials, imidazoles, efficient catalyst , TEM, SEM, EDAX, XRD,
Hydrothermal preparation and characterization of ZnFe2O4 magnetic nanoparticles as catalyst for the synthesis of multi‐substituted imidazoles
Nanoparticles are key focus of research for a wide range of novel applications. As such, ZnFe2O4 magnetic nanoparticles were synthesized hydrothermally and characterized via scanning and transmission electron microscopies, powder X‐ray diffraction, energy‐dispersive X‐ray and infrared spectroscopies, thermogravimetric analysis and magnetic measurements. They were used as a robust catalyst for the synthesis of a series of biologically active multi‐substituted imidazoles ... Read more

Functionalization of Magnetic Nanoparticles for Drug Delivery

2018-09-03 15:32:22 Keywords Magnetic nanoparticles; Nanotechnology; , Functiolization, Drug delivery, TEM, SEM, XRD,
Functionalization of Magnetic Nanoparticles for Drug Delivery
Magnetic nanoparticles (MNPs) possess unique magnetic properties and the ability to function at the cellular and molecular level of biological interactions making them an attractive platform as carriers for drug delivery. Recent advances in nanotechnology have improved the ability to specifically tailor the features and properties of MNPs for these biomedical applications. To better address specific clinical needs, MNPs with ... Read more

Electric, Thermoelectric and Magnetic Properties of Nickel(II) Imine Nanocomplexes

2018-09-03 15:00:43 Keywords TEM, TGA, Ni-Schiff base complexes, electric, thermoelectric, Magnetic, Nanostructures, IR, semiconductor,
Electric, Thermoelectric and Magnetic Properties of Nickel(II) Imine Nanocomplexes
Production of novel organic semiconductor nanomaterials is essential for enabling the development of personal, portable and flexible electronic modules. This work presents Ni(II)-Schiff base complexes with enhanced Seebeck coefficient and weak ferromagnetic ordering for thermoelectric and magnetic devices. Four Ni(II)-Schiff base complexes (namely [Ni(C12">1212H10">1010N3O4Br)]⋅">⋅⋅2H2O, [Ni(C16">1616H11">1111N3O4)">4)4)]⋅">⋅⋅2H2O, [Ni(C21">2121H14">1414N5O8Br)] and [Ni(C25">2525H17">1717N5O8)">8)8)]⋅1/2">⋅1/2⋅1/2H2O) have been synthesized in nanosized dimensions. The electrical and thermoelectric properties have ... Read more