Advances in preparation, biomedical, and pharmaceutical applications of chitosan-based gold, silver, and magnetic nanoparticles: a review

M Jiang, RH Althomali, SA Ansari, EAM Saleh… - International Journal of …, 2023 - Elsevier
During the last decades, the ever-increasing incidence of various diseases, like cancer, has
led to a high rate of death worldwide. On the other hand, conventional modalities (such as …

Competition between enzymatic and non-enzymatic electrochemical determination of cholesterol

MA Hefnawy, SA Fadlallah, RM El-Sherif… - Journal of …, 2023 - Elsevier
Cholesterol is considered an essential component in animal bodies that plays a vital role in
hormone production and creating vitamin D. The elevated blood cholesterol level increases …

Nickel–cobalt oxides decorated Chitosan electrocatalyst for ethylene glycol oxidation

SS Medany, MA Hefnawy - Surfaces and Interfaces, 2023 - Elsevier
A composite of NiCo 2 O 4 modified electrocatalyst is prepared to enhance the ethylene
glycol electrooxidation. Chitosan matrix is used to improve the activity and adsorption ability …

Synthesis and characterization of lead-based metal–organic framework nano-needles for effective water splitting application

AS Eliwa, MA Hefnawy, SS Medany, RG Deghadi… - Scientific Reports, 2023 - nature.com
Metal organic frameworks (MOFs) are a class of porous materials characterized by robust
linkages between organic ligands and metal ions. Metal–organic frameworks (MOFs) exhibit …

Polyaniline-supported nickel oxide flower for efficient nitrite electrochemical detection in water

NS Al-Kadhi, MA Hefnawy, FS Alamro, RA Pashameah… - Polymers, 2023 - mdpi.com
A modified electrode with conducting polymer (Polyaniline) and NiO nanoflowers was
prepared to detect nitrite ions in drinking water. A simple method was used to prepare the …

Ultrasonic-assisted synthesis of nickel metal-organic framework for efficient urea removal and water splitting applications

AS Eliwa, MA Hefnawy, SS Medany, RG Deghadi… - Synthetic Metals, 2023 - Elsevier
The change in the climate is considered a critical environmental issue that humanity will
deal with through the next decade. Herein, the ultrasonic-assisted method prepared the …

Construction of chitosan-supported nickel cobaltite composite for efficient electrochemical capacitor and water-splitting applications

SS Medany, A Nafady, RA Soomro, MA Hefnawy - Scientific Reports, 2024 - nature.com
The construction of highly efficient electrode material is of considerable interest, particularly
for high capacitance and water-splitting applications. Herein, we present the preparation of a …

High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications

SS Medany, MA Hefnawy, SM Kamal - Scientific Reports, 2024 - nature.com
One of the most effective electrocatalysts for electrochemical oxidation reactions is NiMn2O4
spinel oxide. Here, a 3-D porous substrate with good conductivity called carbon felt (CF) is …

Optimizing magnetic, dielectric, and antimicrobial performance in chitosan-PEG-Fe2O3@ NiO nanomagnetic composites

AM Abouelnaga, AM Mansour… - International Journal of …, 2024 - Elsevier
There is a growing interest in eco-friendly and cost-effective organic-inorganic
nanocomposites due to their alignment with the principles of “green” chemistry, as well as …

Zinc nanocomposite supported chitosan for nitrite sensing and hydrogen evolution applications

NS Al-Kadhi, MA Hefnawy, S S. Nafee, FS Alamro… - Polymers, 2023 - mdpi.com
Nanoparticles of ZnO-Chitosan (Zn-Chit) composite were prepared using precipitation
methods. Several analytical techniques, such as scanning electron microscope (SEM) …