Search results for: Said M. El‐Sheikh

Items from 1 to 20 out of 26 results

article

A novel biosensor for early diagnosis of liver cancer cases using smart nano‐magnetic metal–organic framework

Sheta M. Sheta, Said M. El‐Sheikh, Mohkles M. Abd‐Elzaher, Salem R. Salem, more

Applied Organometallic Chemistry > 33 > 12 > n/a - n/a

For the first time, alpha‐fetoprotein (AFP) quantification as an early test for liver cancer diagnosis competing with other interfering analytes and factors based on a novel nano‐magnetic metal–organic framework (MOF) was investigated. The novel nano‐magnetic MOF was synthesized via a simple preparation method, and characterized using various techniques. The X‐ray photoelectron spectrum of the nano‐magnetic...

article

Promising photoluminescence optical approach for triiodothyronine hormone determination based on smart copper metal–organic framework nanoparticles

Sheta M. Sheta, Said M. El‐Sheikh, Mohkles M. Abd‐Elzaher

Applied Organometallic Chemistry > 33 > 9 > n/a - n/a

A copper metal–organic framework nanoparticles (Cu‐MOF‐NPs) synthesized via simple technique. The prepared Cu‐MOF‐NPs nanoparticles were further characterized using ¹H‐NMR, FE‐SEM/EDX and thermal study (DSC/TGA). The FE‐SEM/EDX, thermal analysis, and NMR spectrum data with the other analysis support the nano‐Cu‐MOF structure and the monomeric unit (n[Cu (AIP)₂(APY)(H₂O)₂].4H₂O) of Cu‐MOF‐NPs. The...

article

A novel nano‐size lanthanum metal–organic framework based on 5‐amino‐isophthalic acid and phenylenediamine: Photoluminescence study and sensing applications

Sheta M. Sheta, Said M. El‐Sheikh, Mohkles M. Abd‐Elzaher, Ahmed R. Wassel

Applied Organometallic Chemistry > 33 > 4 > n/a - n/a

In this paper, a novel lanthanum metal–organic framework La‐MOF was prepared via hydrothermal and reflux methods. The La‐MOF was achieved through the reaction of a 5‐amino‐isophthalic acid with 1, 2‐phenylenediamine and lanthanum chloride. The prepared La‐MOF structure was confirmed by XRD, mass spectrometry, IR, UV–Vis and elemental analysis, whereas the size, and morphology was examined by FE‐SEM/EDX...

article

A novel optical approach for determination of prolactin based on Pr-MOF nanofibers

Sheta M. Sheta, Said M. El-Sheikh, Mokhles M. Abd-Elzaher

Analytical and Bioanalytical Chemistry > 2019 > 411 > 7 > 1339-1349

The analytical quantification and follow-up of the hormone prolactin is very important in clinical diagnosis (e.g., in cases of breast cancer), treatment, and the medical laboratory. The development of a new simple, fast, and less costly method is of considerable importance. Novel praseodymium metal–organic framework nanofibers (Pr-MOF-NFs) were synthesized by a facile and simple method for the determination...

article

Influence of reaction temperature and time on nanoboron carbide morphology and its thermal stability, optical and electronic properties

Said M. El-Sheikh, Yasser M. Z. Ahmed, Asmaa Abd-El-Baset Abd-Allah, Said A. Sayed

Journal of the Australian Ceramic Society > 2018 > 54 > 3 > 501-512

Boron carbide powder was prepared via the carbothermic reduction reaction (CRR) using lactose (C₁₂H₂₂O₁₁) and boric acid (H₃BO₃) as carbon and boron sources. Starting materials were mixed with an excess amount of H₃BO₃ stoichiometric ratio to reduce the presence of free carbon content in the produced boron carbide samples caused by the great loss of boron during the reaction. The mixed solutions of...

article

Removal and Spectrophotometric Determination of Anionic Dye Using a Polymeric Nanocomposite

Omnia I.M. Ali, Said M. El‐Sheikh

Journal of the Chinese Chemical Society > 64 > 11 > 1367 - 1377

Removal and spectrophotometric determination of trace amounts of methyl orange (MO) in tap and Nile water using silver nanoparticles (AgNPs) supported over polyurethane foam were successfully carried out. AgNPs and samples of a nanocomposite of polyurethane foam and silver nanoparticles (PUF/AgNPs) were characterized using UV–vis spectroscopy, field‐emission scanning electron microscopy (FE‐SEM),...

article

Functionalization of Synthesized NaP Zeolite with Silver Nanoparticles Capped with Alkyl Dimethyl Hydroxyethyl Ammonium for Sorption and Reduction of Chromate(VI) Oxoanions

Tarek M. Salama, Ibraheem O. Ali, Mostafa F. Bakr, Said M. El-Sheikh, more

Journal of Inorganic and Organometallic Polymers and Materials > 2018 > 28 > 1 > 334-351

NaP zeolite crystals were synthesized and used as templating support species for the purpose of hosting and the confinement of silver nanoparticles. This was being adapted primarily by introducing trace amounts of alkyl dimethyl hydroxyethyl ammonium chloride (ADHA) ranging from 50 to 200 ppm into the zeolite (Ag/ADH-NaP_50–200). For comparison purposes, ADHA/NaP and Ag/NaP were also prepared under...

article

Highly active non-metals doped mixed-phase TiO2 for photocatalytic oxidation of ibuprofen under visible light

Tamer M. Khedr, Said M. El-Sheikh, Amer Hakki, Adel A. Ismail, more

Journal of Photochemistry and Photobiology A: Chemistry > 2017 > 346 > C > 530-540

Visible light-activated C, N, S-tri-doped mesoporous anatase-brookite heterojunction TiO₂ photocatalyst has been synthesized by a facile hydrothermal method. The XRD and Raman spectra data revealed the formation of mixed anatase and brookite phases. The FE-SEM and TEM images demonstrated the formation of brookite phase with a rod-like structure composed of much smaller particles of anatase phase....

article

Controlling the Morphology and Oxidation Resistance of Boron Carbide Synthesized Via Carbothermic Reduction Reaction

Yasser M. Z. Ahmed, Said M. El-Sheikh, Emad M. M. Ewais, Asmaa A. Abd-Allah, more

Journal of Materials Engineering and Performance > 2017 > 26 > 3 > 1444-1454

Boron carbide powder was synthesized from boric acid and lactose mixtures via easy procedure. Boric acid and lactose solution mixtures were roasted in stainless steel pot at 280 °C for 24 h. Boron carbide was obtained by heating the roasted samples under flowing of industrial argon gas at 1500 °C for 3 h. The amount of borate ester compound in the roasted samples was highly influenced by the boron/carbon...

article

Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

Said M. El-Sheikh, Tamer M. Khedr, Geshan Zhang, Vasileia Vogiazi, more

Chemical Engineering Journal > 2017 > 310 > P2 > 428-436

Anatase–brookite heterojunction TiO₂ (ABH) photocatalysts were purposefully tailored by introducing different glycine concentrations through hydrothermal treatment at 200°C for 20h. In the absence of glycine, pure anatase and brookite phases were selectively prepared via simply adjusting the initial pH value with NH₄OH or NaOH. The as-synthesized photocatalysts were characterized with X-ray diffraction...

article

Visible light activated carbon and nitrogen co-doped mesoporous TiO2 as efficient photocatalyst for degradation of ibuprofen

Said M. El-Sheikh, Tamer M. Khedr, Amer Hakki, Adel A. Ismail, more

Separation and Purification Technology > 2017 > 173 > C > 258-268

Carbon and nitrogen co-doped mesoporous TiO₂ photocatalysts with tunable brookite/anatase ratios controlled by glycine assistant were synthesized through one-pot hydrothermal process. Structural investigations indicated a formation of pure brookite TiO₂ nano-spindles in the absence of glycine, while when glycine was added, mesoporous heterojunction TiO₂ nanoparticles consisted of small quasi-spherical...

chapter

Nanocrys Talline Boron Carbide Powder Synthesized Via Carbothermal Reduction Reaction

Said M. El‐Sheikh, Yasser M. Z. Ahmed, Emad M. M. Ewais, Asmaa Abd‐El‐Baset Abd Allah, more

Ceramic Engineering and Science Proceedings > Advances in Ceramic Armor XI > 63 - 74

Boron carbide is an important strategic material due to high hardness, mechanical properties and neutron absorption cross‐section which make it an attractive material for micro‐electronic, nuclear, military and medicine. Boron carbide is regarded as the third hardest material after diamond and cubic boron nitride. It has various excellent properties such as, high melting point (>2400°C), outstanding...

article

Optical properties of nanocrystalline magnesium aluminate spinel synthesized from industrial wastes

Emad M.M. Ewais, Dina H.A. Besisa, Ahmed A.M. El-Amir, Said M. El-Sheikh, more

Journal of Alloys and Compounds > 2015 > 649 > C > 159-166

In this work, magnesium aluminate spinel (MA) nanoparticles were synthesized via co-precipitation method using industrial wastes of magnesium and aluminum. The obtained powders were calcined at a temperature range of 650–1500 °C. The calcined powders were characterized by XRD, FT-IR, DTA, FE-SEM and HR-TEM. XRD data illustrated that the spinel MA with a crystallite size of ∼3.8 nm was formed at 650 °C...

chapter

Efficient mesoporous anatase-brookite TiO2 photocatalysts for degradation of ibuprofen

Said M. El-Sheikh, Tamer M. Khedr, Adel A. Ismial, Waheed A. Badawy

2015 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) > 139 - 142

2015 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

Mesoporous anatase-brookite heterojunction TiO2 photocatalysts with tunable brookite/anatase ratios controlled by glycine assistant were successfully synthesized by facile hydrothermal process. In addition, pure brookite phase was prepared in the absence of glycine. The obtained TiO2 catalysts have been characterized by X-ray diffraction, Brunauer-Emmett-Teller analysis, transmission electron microscope...

article

Thermally Conductive Adhesive from Chemically Modified Cellulose and Nanoparticle of Surfactant‐Doped Polypyrrole

Sarifah Fauziah Syed Draman, Rusli Daik, Said M. El‐Sheikh, Famiza Abdul Latif

Macromolecular Symposia > 353 > 1 > 24 - 30

Nanocomposite of thermally conductive adhesive was prepared from cellulose‐based adhesive, TSA‐doped Ppy and ceramic filler via colloidal dispersion. Field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA) and differential scanning colorimetry (DSC) were used to characterize the nanocomposites. Electrical and thermal conductivity were measured by using frequency response...

article

Identification of TiO2 photocatalytic destruction byproducts and reaction pathway of cylindrospermopsin

Geshan Zhang, Elizabeth M. Wurtzler, Xuexiang He, Mallikarjuna N. Nadagouda, more

Applied Catalysis B: Environmental > 2015 > 163 > C > 591-598

Cylindrospermopsin (CYN) has become a significant environmental concern because of its extremely high toxicity and widespread distribution. TiO₂ assisted photocatalytic degradation process has been proven to be effective for CYN degradation. However, the lack of investigation on byproducts and pathways of CYN photocatalytic destruction limited the assessment of this treatment technology (e.g. toxicity...

article

Novel Synthesis of Cobalt Nickel Tungstate Nanopowders and its Photocatalytic Application

Said M. El-Sheikh, Mohamed M. Rashad

Journal of Cluster Science > 2015 > 26 > 3 > 743-757

Nanocrystalline cobalt nickel tungstate powders (CO_1−XNi_XWO₄ where X = 0, 0.5 and 1) have been synthesized by a microemulsion method. The results indicate that pure monoclinic wolframite tungstate structure was obtained from the precipitated precursors at pH 10 calcined at a temperature 600 °C for 6 and 10 h. Meanwhile, the average particle sizes of the formed tungstate powders were about 12–35 nm...

article

Controllable synthesis of NaP zeolite and its application in calcium adsorption

Ibraheem O. Ali, Said M. El-Sheikh, Tarek M. Salama, Mostafa F. Bakr, more

Science China Materials > 2015 > 58 > 8 > 621-633

NaP zeolite particles were prepared through a template-free hydrothermal condition at 100ºC. Parameters like Na₂O/SiO₂ and SiO₂/Al₂O₃ molar ratios, gel aging time and aging temperature were investigated for regulating the crystallization of the final product. The samples at different synthesis stages were characterized with N₂ adsorption at −196ºC, field emission scanning electron microscopy (FE-SEM),...

article

High performance sulfur, nitrogen and carbon doped mesoporous anatase–brookite TiO2 photocatalyst for the removal of microcystin-LR under visible light irradiation

Said M. El-Sheikh, Geshan Zhang, Hamza M. El-Hosainy, Adel A. Ismail, more

Journal of Hazardous Materials > 2014 > 280 > Complete > 723-733

Carbon, nitrogen and sulfur (C, N and S) doped mesoporous anatase–brookite nano-heterojunction titania photocatalysts have been synthesized through a simple sol–gel method in the presence of triblock copolymer Pluronic P123. XRD and Raman spectra revealed the formation of anatase and brookite mixed phases. XPS spectra indicated the presence of C, N and S dopants. The TEM images demonstrated the formation...

article

Degradation of cylindrospermopsin by using polymorphic titanium dioxide under UV–Vis irradiation

Geshan Zhang, Mallikarjuna N. Nadagouda, Kevin O'Shea, Said M. El-Sheikh, more

Catalysis Today > 2014 > 224 > Complete > 49-55

The frequent occurrence of cyanobacterial harmful blooms due to eutrophication necessitates the development of appropriate water treatment technologies for the released cyanotoxins. In this study, nanoparticles composed of anatase–brookite–rutile polymorphic titanium dioxide (PM-TiO ₂ ) were synthesized using a modified sol–gel method with a low temperature oil bath for the photocatalytic...

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Search results for: Said M. El‐Sheikh

A novel biosensor for early diagnosis of liver cancer cases using smart nano‐magnetic metal–organic framework

Promising photoluminescence optical approach for triiodothyronine hormone determination based on smart copper metal–organic framework nanoparticles

A novel nano‐size lanthanum metal–organic framework based on 5‐amino‐isophthalic acid and phenylenediamine: Photoluminescence study and sensing applications

A novel optical approach for determination of prolactin based on Pr-MOF nanofibers

Influence of reaction temperature and time on nanoboron carbide morphology and its thermal stability, optical and electronic properties

Removal and Spectrophotometric Determination of Anionic Dye Using a Polymeric Nanocomposite

Functionalization of Synthesized NaP Zeolite with Silver Nanoparticles Capped with Alkyl Dimethyl Hydroxyethyl Ammonium for Sorption and Reduction of Chromate(VI) Oxoanions

Highly active non-metals doped mixed-phase TiO2 for photocatalytic oxidation of ibuprofen under visible light

Controlling the Morphology and Oxidation Resistance of Boron Carbide Synthesized Via Carbothermic Reduction Reaction

Tailored synthesis of anatase–brookite heterojunction photocatalysts for degradation of cylindrospermopsin under UV–Vis light

Visible light activated carbon and nitrogen co-doped mesoporous TiO2 as efficient photocatalyst for degradation of ibuprofen

Nanocrys Talline Boron Carbide Powder Synthesized Via Carbothermal Reduction Reaction

Optical properties of nanocrystalline magnesium aluminate spinel synthesized from industrial wastes

Efficient mesoporous anatase-brookite TiO2 photocatalysts for degradation of ibuprofen

Thermally Conductive Adhesive from Chemically Modified Cellulose and Nanoparticle of Surfactant‐Doped Polypyrrole

Identification of TiO2 photocatalytic destruction byproducts and reaction pathway of cylindrospermopsin

Novel Synthesis of Cobalt Nickel Tungstate Nanopowders and its Photocatalytic Application

Controllable synthesis of NaP zeolite and its application in calcium adsorption

High performance sulfur, nitrogen and carbon doped mesoporous anatase–brookite TiO2 photocatalyst for the removal of microcystin-LR under visible light irradiation

Degradation of cylindrospermopsin by using polymorphic titanium dioxide under UV–Vis irradiation

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