A5067141983- Carbon and Quantum Dots Applications
- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Supercapacitor Materials and Fabrication
- Nanocluster Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Quantum Dots Synthesis And Properties
- Gamma-ray bursts and supernovae
- Adsorption and biosorption for pollutant removal
- Electrospun Nanofibers in Biomedical Applications
- Extraction and Separation Processes
- Potato Plant Research
- Surface Modification and Superhydrophobicity
- Melamine detection and toxicity
- Graphene and Nanomaterials Applications
- Electrohydrodynamics and Fluid Dynamics
- Biodiesel Production and Applications
- Thermal and Kinetic Analysis
- Nanoparticles: synthesis and applications
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- Energetic Materials and Combustion
- Nanomaterials and Printing Technologies
- Advanced biosensing and bioanalysis techniques
Alexandria University
2016-2024
National Research Institute of Astronomy and Geophysics
2023-2024
An electrochemical deposition technique was used to fabricate polypyrrole (Ppy)/NiO nanocomposite electrodes for supercapacitors. The were characterized and investigated by Fourier transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) impedance (EIS). performance of supercapacitor Ppy/NiO enhanced compared with pristine Ppy electrode. It found that the electrode electrodeposited at 4 A/cm
The aim of this work is to fabricate supercapacitor electrode based on poly (3-hexyl-thiophene-2, 5-diyl) (P3HT) and single-walled carbon nanotubes (SWCNTs) nanocomposites with different ratios onto a graphite sheet as substrate wide voltage window in nonaqueous electrolyte. Structural, morphological electrochemical properties the prepared P3HT/SWCNTs were studied discussed. included cyclic voltammetry (CV), galvanostatic charging-discharging (GCD), impedance spectroscopy (EIS) investigated....
GRB 221009A is the brightest Gamma-Ray Burst (GRB) detected in more than 50 years of study. In this paper, we present observations X-ray and optical domains after obtained by GRANDMA Collaboration (which includes from 30 professional amateur telescopes) Insight-HXMT Collaboration. We study afterglow with empirical fitting GRANDMA+HXMT data, augmented data literature up to 60 days. then model numerically, using a Bayesian approach, HXMT-LE observations, that augment Swift-XRT additional...
Abstract Quantum dots (QDs) with photostability show a potential application in optical sensing and biological imaging. In this work, ternary nanocomposite (NC) of high fluorescent polyaniline (PANI)/2-acrylamido-2-methylpropanesulfonic acid (AMPSA) capped silver nanoparticles (NPs)/graphene oxide quantum (PANI/Ag (AMPSA)/GO QDs) have been synthesized by situ chemical oxidative polymerization aniline the presence Ag NPs GO QDs. QDs were prepared AgNO3 reduction glucose carbonization methods,...
Selective determination of toxic hexavalent chromium (Cr(VI)) is a stringent important due to its huge negative impact on the health and environment. Recently, high sensitivity, rapidness, cost-effectiveness fluorescent sensors for Cr(VI) have been developed. A nanocomposite (NC) has synthesized based doped polyaniline (PANI), 2-acrylamido-2-methylpropanesulfonic acid (AMPSA) capped Ag nanoparticles (NPs) graphene oxide (GO) quantum dots (QDs) via in situ reaction highly selective sensing...
Nanotoxicology is argued and considered one of the emerging topics. In this study, polyaniline (PANI)/2-acrylamido-2-methylpropanesulfonic acid (AMPSA) capped silver nanoparticles (NPs)/graphene oxide (GO) quantum dots (QDs) nanocomposite (PANI/Ag (AMPSA)/GO QDs NC) as a nanoadsorbent has potential for removal toxic hexavalent chromium (Cr(VI)) ions from water. The acute toxicity NC was evaluated on Artemia salina freshwater Ostracods (Cypridopsis vidua) larvae 48 h. measurements were made...
In this paper, nitrogen graphene quantum dots (N-GQDs) and copper indium sulfide/zinc sulfide (CIS/ZnS) QDs were synthesized via facile hydrothermal aqueous solution routes, respectively. Herein, a fluorescent nanocomposite has been between N-GQDs CIS/ZnS in an phase. This was characterized by photoluminescence, Raman, ultraviolet–visible (UV–vis) spectroscopies, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD). developed as highly sensitive, selective...
Acetone is a dangerous material that poses major risk to human health. To protect against its harmful impacts, fluorescent biosensor 3-aminopropyl triethoxysilane capped ZnO quantum dots (APTES/ZnO QDs) was investigated detect low concentrations of acetone. Numerous techniques, including Fourier transform infrared (FTIR), energy dispersive X-ray (EDX), photoelectron spectroscopy (XPS), diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), zeta potential, UV-vis...
ABSTRACT GRB 230812B is a bright and relatively nearby (z = 0.36) long gamma-ray burst (GRB) that has generated significant interest in the community thus been observed over entire electromagnetic spectrum. We report 80 observations X-ray, ultraviolet, optical, infrared, submillimetre bands from GRANDMA (Global Rapid Advanced Network for Multimessenger Addicts) network of observatories observational partners. Adding complementary data literature, we then derive essential physical parameters...
The aim of this study is to develop a ternary nanocomposite (NC) polyaniline (PANI)/2-acrylamido-2-methylpropanesulfonic acid (AMPSA)-capped silver nanoparticles (NPs)/graphene oxide quantum dots (PANI/Ag (AMPSA)/GO QDs) as an efficient adsorbent for the removal highly toxic hexavalent chromium (Cr(vi)) from polluted water. PANI/Ag QDs NC was synthesized via in situ oxidative polymerization. effects pH, dose, initial concentration, temperature, contact time, ionic strength and co-existing...
Abstract Oily water contamination has been sighted as one of the most global environmental pollution. Herein, copper hydroxide nanorods layer was constructed onto cellulosic filter paper surface cured with polydopamine, Ag nanoparticles, and Cu NPs through immersion method. This work aimed to produce a superhydrophobic superoleophilic paper. The structure, crystalline, morphological properties these modified were investigated. Scanning electron microscope images confirmed that rougher...
The uptake of low concentration toxic cadmium ions from polluted water by polyaniline/akaganéite superparamagnetic nanocomposite was investigated.Akaganéite nanoparticles (NPs) and polyaniline (PANI) doped with hydrochloric acid were synthesized co-precipitation chemical polymerization methods, respectively.Polyaniline/akaganéite formed using facile method.High resolution transmission microscope image PANI/akaganéite revealed that it is composed sheets spherical shaped PANI as a matrix...
In order to protect human health from the adverse impacts of acrylamide and acetone, simple analytical processes are required detect low concentrations acetone. Dual functional garlic-capped silver nanoparticles (G-Ag NPs) have been used as fluorescent sensors for This technique depends on quenching photoluminescence (PL) intensity G-Ag NPs with interaction either or probe presented high selectivity toward a wide linear response 0.01-6 mM limit detection (LOD) 2.9 μM. Moreover, this also...
Oil-water separation is a difficult process, and many reported materials have the drawbacks of low oil absorption which limit their application. Herein, we nylon 6 nanofibers prepared by electrospinning process using formic acid. The nanofibers' surface morphology, crystallinity, hydrophobicity, sorption capacity were studied. Morphological analysis 30 wt % /formic acid demonstrated uniform that are free from beads with an average diameter varying to 90 nm. results revealed contact angle...
Abstract Acrylamide (AA) is a carcinogenic, neurotoxin, and pregnancy‐harmful agent produced in food thermal processing. A specified excellent analytical technique performance desired for detecting low AA concentration human protection from its adverse impacts. photoluminescent sensor APTES capped zinc oxide quantum dots (APTES/ZnO QDs) has been synthesized quantification. Different capping agent's effects, instance, triethanolamine (TEA), oleic acid (OA), tetraethyl orthosilicate (TEOS),...
The combustion behavior, flammability limits and ballistic properties, of composite low oxygen content propellants were studied experimentally by using propellant formulations based on hydroxy-terminated polybutadiene pre-polymer (HTPB) / ammonium perchlorate oxidizer (AP).Higher pressures AP contents as well smaller particle size found to promote sustained increase burning rate.The addition aluminum powder (Al) a metallic fuel copper chromite (CC), rate accelerator, caused an in the rate.A...
Aims. We present a campaign designed to train the Global Rapid Advanced Network Devoted Multi-messenger Addicts (GRANDMA) network and its infrastructure follow up on transient alerts detect their early afterglows. In preparation for O4 II campaign, we focused gamma-ray burst (GRB) since they are expected serve as electromagnetic counterpart of gravitational-wave events. Our goal was improve our response start prompt observations soon possible, so that may better prepare GRANDMA fourth...