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Article ; Online: Eco-friendly anti-corrosion performance of chitosan modified with fused heterocyclic compound on mild steel in acidic medium.

Al Kiey, Sherief A / Mohamed-Ezzat, Reham A / Dacrory, Sawsan

International journal of biological macromolecules

2024 Volume 263, Issue Pt 1, Page(s) 130133

Abstract: This study aims to explore the prevention of chitosan modified with a fused heterocyclic compound as a sustainable corrosion inhibitor for mild steel in 1 M HCl. Electrochemical instruments, including potentiodynamic polarization techniques, and ... ...

Abstract	This study aims to explore the prevention of chitosan modified with a fused heterocyclic compound as a sustainable corrosion inhibitor for mild steel in 1 M HCl. Electrochemical instruments, including potentiodynamic polarization techniques, and electrochemical impedance spectroscopy (EIS), were employed to evaluate the corrosion protection performance. The outcomes showed that the chitosan modified with a fused heterocyclic compound has outstanding inhibition performance, with an inhibition effectiveness of 98.25 % at 100 ppm. The anti-corrosion features of modified chitosan were ascribed to the presence of hetero atoms in modified chitosan composite which leads to the creation of a protective layer, The modified chitosan composite behaved as mixed-typed inhibitors, as shown by the PDP results. The modified chitosan composite adsorbs on mild steel in the investigated corrosive media via chemisorption interactions, and its adsorption followed the Langmuir adsorption model. Furthermore, increasing the temperature from 303 to 333 K enhanced the corrosion rate, most likely due to the desorption of the inhibitor agent from the steel surface.
MeSH term(s)	Chitosan/chemistry ; Steel/chemistry ; Corrosion ; Surface Properties ; Hydrochloric Acid/chemistry
Chemical Substances	Chitosan (9012-76-4) ; Steel (12597-69-2) ; Hydrochloric Acid (QTT17582CB)
Language	English
Publishing date	2024-02-13
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2024.130133
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Article ; Online: Facile synthesis of MOF-derived N doped ZnO/C nanoparticles and its adsorption activity toward dye removal.

Abas, Khadiga Mohamed / Al Kiey, Sherief A

BMC chemistry

2023 Volume 17, Issue 1, Page(s) 126

Abstract: Metal-organic framework (MOF)-derived materials have gained an increasing interest and showed potential adsorption features in numerous applications. Significant attempts have been performed to boost the structure, functionality, surface area and ... ...

Abstract	Metal-organic framework (MOF)-derived materials have gained an increasing interest and showed potential adsorption features in numerous applications. Significant attempts have been performed to boost the structure, functionality, surface area and porosity in addition to adsorption performance of MOF-derived carbon nanoparticles. Here, nitrogen-doped ZnO/carbon nanoparticles were synthesized by directly pyrolysis of Zn based metal organic framework (ZIF-8) in a nitrogen atmosphere at two different temperatures (600 and 800 °C), followed by chemical impregnation with ZnCl
Language	English
Publishing date	2023-09-26
Publishing country	Switzerland
Document type	Journal Article
ISSN	2661-801X
ISSN (online)	2661-801X
DOI	10.1186/s13065-023-01038-6
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Article ; Online: Insight into TEMPO-oxidized cellulose-based composites as electrochemical sensors for dopamine assessment.

Al Kiey, Sherief A / Khalil, Ahmed M / Kamel, Samir

International journal of biological macromolecules

2023 Volume 239, Page(s) 124302

Abstract: The diagnosis and treatment of many neurological and psychiatric problems depend on establishing simple, inexpensive, and comfortable electrochemical sensors for dopamine (DA) detection. Herein, 2,2,6,6 tetramethylpiperidine-1-oxyl (TEMPO)-oxidized ... ...

Abstract	The diagnosis and treatment of many neurological and psychiatric problems depend on establishing simple, inexpensive, and comfortable electrochemical sensors for dopamine (DA) detection. Herein, 2,2,6,6 tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOC) were successfully loaded with silver nanoparticles (AgNPs) and/or graphite (Gr) and crosslinked by tannic acid, producing composites. This study describes a suitable casting procedure for the composite synthesis of TOC/AgNPs and/or Gr for the electrochemical detection of dopamine. Electrochemical impedance spectra (EIS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed to characterize the TOC/AgNPs/Gr composites. In addition, the direct electrochemistry of electrodes treated with the prepared composites was examined using cyclic voltammetry. The TOC/AgNPs/Gr composite-modified electrode improved electrochemical performance towards detecting dopamine compared to TOC/Gr-modified electrodes. Upon employing amperometric measurement, our electrochemical instrument has a wide linear range (0.005-250 μM), a low limit of detection (0.0005 μM) at S/N = 3, and a high sensitivity (0.963 μA μM
MeSH term(s)	Dopamine ; Cellulose, Oxidized ; Metal Nanoparticles/chemistry ; Reproducibility of Results ; Limit of Detection ; Silver/chemistry ; Graphite/chemistry ; Electrochemical Techniques/methods ; Electrodes
Chemical Substances	Dopamine (VTD58H1Z2X) ; Cellulose, Oxidized ; Silver (3M4G523W1G) ; Graphite (7782-42-5)
Language	English
Publishing date	2023-04-01
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.124302
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Article ; Online: Insight into TEMPO-oxidized cellulose-based composites as electrochemical sensors for dopamine assessment

Al Kiey, Sherief A. / Khalil, Ahmed M. / Kamel, Samir

International Journal of Biological Macromolecules. 2023 June, v. 239 p.124302-

2023

Abstract	The diagnosis and treatment of many neurological and psychiatric problems depend on establishing simple, inexpensive, and comfortable electrochemical sensors for dopamine (DA) detection. Herein, 2,2,6,6 tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOC) were successfully loaded with silver nanoparticles (AgNPs) and/or graphite (Gr) and crosslinked by tannic acid, producing composites. This study describes a suitable casting procedure for the composite synthesis of TOC/AgNPs and/or Gr for the electrochemical detection of dopamine. Electrochemical impedance spectra (EIS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed to characterize the TOC/AgNPs/Gr composites. In addition, the direct electrochemistry of electrodes treated with the prepared composites was examined using cyclic voltammetry. The TOC/AgNPs/Gr composite-modified electrode improved electrochemical performance towards detecting dopamine compared to TOC/Gr-modified electrodes. Upon employing amperometric measurement, our electrochemical instrument has a wide linear range (0.005–250 μM), a low limit of detection (0.0005 μM) at S/N = 3, and a high sensitivity (0.963 μA μM⁻¹ cm⁻²). Additionally, it was demonstrated that DA detection seemed to have outstanding anti-interference characteristics. The proposed electrochemical sensors meet the clinical criteria regarding reproducibility, selectivity, stability, and recovery. The straightforward electrochemical method utilized in this paper may provide a potential framework for creating dopamine quantification biosensors.
Keywords	Fourier transform infrared spectroscopy ; X-ray diffraction ; biosensors ; cellulose nanofibers ; crosslinking ; detection limit ; dopamine ; electrochemistry ; electrodes ; electron microscopy ; graphene ; nanosilver ; tannins ; voltammetry ; TEMPO oxidized cellulose ; Electrochemical sensor ; Silver nanoparticles ; Tannic acid ; Graphite
Language	English
Dates of publication	2023-06
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.124302
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Article: Green and facile synthesis of nickel oxide-porous carbon composite as improved electrochemical electrodes for supercapacitor application from banana peel waste

Al Kiey, Sherief A. / Hasanin, Mohamed S.

Environmental science and pollution research. 2021 Dec., v. 28, no. 47

2021

Abstract: Lithium-ion batteries and supercapacitors are examples of energy storage technologies that have a lot of promise in a variety of applications. Herein, NiO-porous carbon composites were prepared by a green and cost-effective facile synthesis route from ... ...

Abstract	Lithium-ion batteries and supercapacitors are examples of energy storage technologies that have a lot of promise in a variety of applications. Herein, NiO-porous carbon composites were prepared by a green and cost-effective facile synthesis route from banana peel waste materials. The surface morphology and chemical composition of the NiO-porous carbon composite were investigated using a scanning electron microscope (SEM) and energy dispersive x-ray analysis (EDX). The prepared samples were also described through Fourier transform infrared (FTIR) spectroscopy, x-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), and surface area measurements. The electrochemical behavior of prepared materials was studied by cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance (EIS) to test their applicable suitability as supercapacitor electrode. PC-NiO (3) composite exhibits a remarkable specific capacitance of 811 F/g at a current density of 1 A/g. The specific capacitance of PC-NiO (3) is 5.3 times more than that of PC material at 1.0 A/g. Furthermore, the PC-NiO (3) composite material still exhibits a specific capacitance of 780 F/g at 5.0 A/g, high rate capability of 84.55% retention at a high current density of 10.0 A/g and superior cycle stability at 1000 cycles. Based on its high specific capacitance, the NiO-porous carbon nanocomposite is one of the most promising electrode materials for supercapacitors, according to the above results.
Keywords	Fourier transform infrared spectroscopy ; X-ray diffraction ; banana peels ; capacitance ; carbon ; chemical composition ; cost effectiveness ; electrochemical capacitors ; electrochemistry ; electrodes ; energy ; energy-dispersive X-ray analysis ; nanocomposites ; nickel ; pollution ; research ; surface area ; thermogravimetry ; voltammetry ; wastes
Language	English
Dates of publication	2021-12
Size	p. 66888-66900.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-021-15276-5
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Article ; Online: Green and sustainable chitosan-gum Arabic nanocomposites as efficient anticorrosive coatings for mild steel in saline media.

Al Kiey, Sherief A / Hasanin, Mohamed S / Heakal, Fakiha El-Taib

Scientific reports

2022 Volume 12, Issue 1, Page(s) 13209

Abstract: The application of green and sustainable anticorrosive coatings is becoming of upsurge interest for the protection of metallic materials in aggressive environments. Herein, a stable crystalline chitosan/gum Arabic composite (CGAC) nanopowder was ... ...

Abstract	The application of green and sustainable anticorrosive coatings is becoming of upsurge interest for the protection of metallic materials in aggressive environments. Herein, a stable crystalline chitosan/gum Arabic composite (CGAC) nanopowder was successfully synthesized and characterized by various methods. The CGAC nanopowder with different doses (25, 50, 100, and 200 ppm) was used to coat mild steel samples and examined its anticorrosion ability in 3.5 wt.% NaCl solution using gravimetric, electrochemical measurements, and surface characterization techniques. All methods yielded consistent results revealing that nanocomposite coatings can impart good anticorrosive properties to the steel substrate. The obtained protection efficiency was enhanced with increasing CGAC dose in the applied surface layer achieving 96.6% for the 200 ppm-coating. SEM and AFM surface morphologies of uncoated and coated samples after the inundation in the saline solution showed that CGAC coating can block the active corrosive sites on the steel surface, and prevent the aggressive Cl
MeSH term(s)	Chitosan/chemistry ; Coated Materials, Biocompatible/chemistry ; Gum Arabic ; Nanocomposites/chemistry ; Saline Solution ; Steel/chemistry
Chemical Substances	Coated Materials, Biocompatible ; Saline Solution ; Steel (12597-69-2) ; Gum Arabic (9000-01-5) ; Chitosan (9012-76-4)
Language	English
Publishing date	2022-08-01
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-022-17386-7
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Article ; Online: Author Correction: Green and sustainable chitosan-gum Arabic nanocomposites as efficient anticorrosive coatings for mild steel in saline media.

Al Kiey, Sherief A / Hasanin, Mohamed S / Heakal, Fakiha El-Taib

Scientific reports

2022 Volume 12, Issue 1, Page(s) 16741

Language	English
Publishing date	2022-10-06
Publishing country	England
Document type	Published Erratum
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-022-21477-w
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Article ; Online: Green and facile synthesis of nickel oxide-porous carbon composite as improved electrochemical electrodes for supercapacitor application from banana peel waste.

Al Kiey, Sherief A / Hasanin, Mohamed S

Environmental science and pollution research international

2021 Volume 28, Issue 47, Page(s) 66888–66900

Abstract	Lithium-ion batteries and supercapacitors are examples of energy storage technologies that have a lot of promise in a variety of applications. Herein, NiO-porous carbon composites were prepared by a green and cost-effective facile synthesis route from banana peel waste materials. The surface morphology and chemical composition of the NiO-porous carbon composite were investigated using a scanning electron microscope (SEM) and energy dispersive x-ray analysis (EDX). The prepared samples were also described through Fourier transform infrared (FTIR) spectroscopy, x-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), and surface area measurements. The electrochemical behavior of prepared materials was studied by cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance (EIS) to test their applicable suitability as supercapacitor electrode. PC-NiO (3) composite exhibits a remarkable specific capacitance of 811 F/g at a current density of 1 A/g. The specific capacitance of PC-NiO (3) is 5.3 times more than that of PC material at 1.0 A/g. Furthermore, the PC-NiO (3) composite material still exhibits a specific capacitance of 780 F/g at 5.0 A/g, high rate capability of 84.55% retention at a high current density of 10.0 A/g and superior cycle stability at 1000 cycles. Based on its high specific capacitance, the NiO-porous carbon nanocomposite is one of the most promising electrode materials for supercapacitors, according to the above results.
MeSH term(s)	Carbon ; Electrodes ; Musa ; Nickel ; Porosity
Chemical Substances	Carbon (7440-44-0) ; Nickel (7OV03QG267) ; nickel monoxide (C3574QBZ3Y)
Language	English
Publishing date	2021-07-08
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-021-15276-5
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Article: Lymphoma and Differentiated Thyroid Cancer: A Case Series.

Sherief, Amitha / Thambi, Sugeeth M / Susan Joy Philip, Deepa / Menon, Abhilash / A, Sreekumar

Cureus

2023 Volume 15, Issue 1, Page(s) e34429

Abstract: Occurrences of lymphoma and differentiated thyroid cancer are rare. Usually, involvement of the thyroid gland is seen as a part of extranodal involvement or as a part of radiation-induced malignant transformation in previously treated lymphoma patients. ... ...

Abstract	Occurrences of lymphoma and differentiated thyroid cancer are rare. Usually, involvement of the thyroid gland is seen as a part of extranodal involvement or as a part of radiation-induced malignant transformation in previously treated lymphoma patients. The incidence of synchronous hematological malignancy with differentiated thyroid cancer is 7%. The synchronous occurrence of differentiated thyroid cancer and lymphoma poses a significant diagnostic and treatment dilemma. Here we report a case series of four patients with lymphoma and differentiated thyroid cancer. All four patients had lymphoma treated first followed by definitive management of thyroid malignancy.
Language	English
Publishing date	2023-01-31
Publishing country	United States
Document type	Case Reports
ZDB-ID	2747273-5
ISSN	2168-8184
ISSN	2168-8184
DOI	10.7759/cureus.34429
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Article ; Online: Polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly (AM-co-ECA-co-AMPS): Broadband dielectric spectroscopy investigations.

Darwish, Abdelfattah / El-Sayed, Naglaa Salem / Al Kiey, Sherief A / Kamel, Samir / Turky, Gamal

International journal of biological macromolecules

2023 Volume 232, Page(s) 123443

Abstract: In this study, the dielectric behavior of polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) was investigated by broadband dielectric spectroscopy (BDS). The dielectric spectra obtained from -70 ...

Abstract	In this study, the dielectric behavior of polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) was investigated by broadband dielectric spectroscopy (BDS). The dielectric spectra obtained from -70 to 70 °C showed a superposition of three distinctive processes, electrode polarization, charge carrier's transport, and a molecular relaxation process. These dynamic processes were further analyzed along with the effect of both temperature and reduced graphene oxide (rGO) content. The development of a clear electrochemical double layer (ECDL) at the electrode/hydrogel interface strongly supports its possible application in supercapacitors' forms of energy storage. TGA, DSC, rheology, and electrochemical properties were studied. Furthermore, when the composite hydrogel with rGO content of 2.5 % was assembled into a symmetric supercapacitor, it displayed a specific capacitance of 756 F.g
MeSH term(s)	Hydrogels ; Dielectric Spectroscopy ; Electricity ; Alginates ; Poly A
Chemical Substances	graphene oxide ; Hydrogels ; Alginates ; Poly A (24937-83-5)
Language	English
Publishing date	2023-01-26
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.123443
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