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Nada EA, El-Maghrabi HH, Ali HR, El-Wahab SA, Sabry DY, Moustafa YM, Nada AA. Superior photodegradation activity of MoS2/TiO2 nanofibers for phenol under visible light irradiation. DWT 2022; 255:236-241. [DOI: 10.5004/dwt.2022.28346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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El-Maghrabi HH, Nada AA, Bekheet MF, Roualdes S, Riedel W, Iatsunskyi I, Coy E, Gurlo A, Bechelany M. Coaxial nanofibers of nickel/gadolinium oxide/nickel oxide as highly effective electrocatalysts for hydrogen evolution reaction. J Colloid Interface Sci 2021; 587:457-466. [DOI: 10.1016/j.jcis.2020.11.103] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 11/06/2020] [Accepted: 11/26/2020] [Indexed: 02/06/2023]
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Najem M, Nada AA, Weber M, Sayegh S, Razzouk A, Salameh C, Eid C, Bechelany M. Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation. Materials (Basel) 2020; 13:ma13081947. [PMID: 32326154 PMCID: PMC7215890 DOI: 10.3390/ma13081947] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/14/2020] [Accepted: 04/16/2020] [Indexed: 11/23/2022]
Abstract
As organic dyes are a major source of pollution, it is important to develop novel and efficient heterogeneous catalysts with high activity for their degradation. In this work, two innovative techniques, atomic layer deposition and electrospinning, were used to prepare palladium nanoparticles (Pd NPs) supported on carbon nanofibers (CNFs). The sample morphology was investigated using scanning and transmission electron microscopy. This showed the presence of nanofibers of several micrometers in length and with a mean diameter of 200 nm. Moreover, the size of the highly dispersed Pd NPs was about 7 nm. X-ray photoelectron spectroscopy visually validated the inclusion of metallic Pd. The prepared nano-catalysts were then used to reduce methyl orange (MO) in the presence of sodium borohydride (NaBH4). The Freundlich isotherm model was the most suitable model to explain the adsorption equilibrium for MO onto the Pd/CNF catalysts. Using 5 mL MO dye-solution (0.0305 mM) and 1 mL NaBH4 (0.026 mM), a 98.9% of catalytic activity was achieved in 240 min by 0.01 g of the prepared nano-catalysts Pd/C (0.016 M). Finally, no loss of catalytic activity was observed when such catalysts were used again. These results represent a promising avenue for the degradation of organic pollutants and for heterogeneous catalysis.
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Affiliation(s)
- Melissa Najem
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
| | - Amr A. Nada
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
- Department of Analysis and Evaluation, Egyptian Petroleum Research Institute, Cairo, Nasr City P.B. 11727, Egypt
| | - Matthieu Weber
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
| | - Syreina Sayegh
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
- Laboratory of Chemical Analyses, Faculty of Sciences 2, Lebanese University, Fanar B.P. 90656, Lebanon;
| | - Antonio Razzouk
- Laboratory of Chemical Analyses, Faculty of Sciences 2, Lebanese University, Fanar B.P. 90656, Lebanon;
| | - Chrystelle Salameh
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
| | - Cynthia Eid
- EC2M, Faculty of Science 2, Fanar Campus, Lebanese University, Fanar B.P. 90656, Lebanon;
| | - Mikhael Bechelany
- Institut Européen des Membranes, IEM–UMR 5635, ENSCM, CNRS, University Montpellier, 34730 Montpellier, France; (M.N.); (A.A.N.); (M.W.); (S.S.); (C.S.)
- Correspondence:
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Barhoum A, El-Maghrabi HH, Iatsunskyi I, Coy E, Renard A, Salameh C, Weber M, Sayegh S, Nada AA, Roualdes S, Bechelany M. Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions. J Colloid Interface Sci 2020; 569:286-297. [PMID: 32114107 DOI: 10.1016/j.jcis.2020.02.063] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/11/2020] [Accepted: 02/15/2020] [Indexed: 12/20/2022]
Abstract
The most critical challenge in hydrogen fuel production is to develop efficient, eco-friendly, low-cost electrocatalysts for water splitting. In this study, self-supported carbon nanofiber (CNF) electrodes decorated with nickel/nickel oxide (Ni/NiO) and palladium (Pd) nanoparticles (NPs) were prepared by combining electrospinning, peroxidation, and thermal carbonation with atomic layer deposition (ALD), and then employed for hydrogen evolution and oxygen evolution reactions (HER/OER). The best CNF-Ni/NiO-Pd electrode displayed the lowest overpotential (63 mV and 1.6 V at j = 10 mA cm-2), a remarkably small Tafel slope (72 and 272 mV dec-1), and consequent exchange current density (1.15 and 22.4 mA cm-2) during HER and OER, respectively. The high chemical stability and improved electrocatalytic performance of the prepared electrodes can be explained by CNF functionalization via Ni/NiO NP encapsulation, the formation of graphitic layers that cover and protect the Ni/NiO NPs from corrosion, and ALD of Pd NPs at the surface of the self-supported CNF-Ni/NiO electrodes.
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Affiliation(s)
- Ahmed Barhoum
- Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo 11795, Egypt; Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France.
| | - Heba H El-Maghrabi
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France; Dept. of Refining, Egyptian Petroleum Research Institute, Cairo, Nasr City P.B. 11727, Egypt
| | - Igor Iatsunskyi
- NanoBioMedical Centre, Adam Mickiewicz University, 3 Wszechnicy Piastowskiej str., 61-614 Poznan, Poland
| | - Emerson Coy
- NanoBioMedical Centre, Adam Mickiewicz University, 3 Wszechnicy Piastowskiej str., 61-614 Poznan, Poland
| | - Aurélien Renard
- LCPME - UMR 7564 - CNRS - Université de Lorraine, 405, rue de Vandoeuvre, 54600 Villers-Les-Nancy, France
| | - Chrystelle Salameh
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France
| | - Matthieu Weber
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France
| | - Syreina Sayegh
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France
| | - Amr A Nada
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France; Dept. of Analysis and Evaluation, Egyptian Petroleum Research Institute, Cairo, Nasr City P.B. 11727, Egypt
| | - Stéphanie Roualdes
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France
| | - Mikhael Bechelany
- Institut Européen des Membranes (IEM), UMR-5635, Univ Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier, France.
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Abd Elhamid AEM, Shawkey H, Nada AA, Bechelany M. Anomalous dielectric constant value of graphene oxide/Polyvinyl alcohol thin film. Solid State Sciences 2019; 94:28-34. [DOI: 10.1016/j.solidstatesciences.2019.05.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Nada AA, Bekheet MF, Roualdes S, Gurlo A, Ayral A. Functionalization of MCM-41 with titanium oxynitride deposited via PECVD for enhanced removal of methylene blue. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.154] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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El-Maghrabi HH, Al-Kahlawy AA, Nada AA, Zaki T. Photocorrosion resistant Ag 2CO 3@Fe 2O 3/TiO 2-NT nanocomposite for efficient visible light photocatalytic degradation activities. J Hazard Mater 2018; 360:250-256. [PMID: 30121355 DOI: 10.1016/j.jhazmat.2018.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 06/13/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
Ternary nanocomposite Ag2CO3@Fe2O3/TiO2-NT (AFT), compared with binary Fe2O3/TiO2-NT (FTNT) and TiO2 nanotube (TNT), showed remarkably enhanced performance for catalytic photodegradation of phenol compounds in the presence of solar irradiation. AFT nanocomposite performed high degradation efficiency (96.5%) and high degree of sustainability. The unique catalytic properties of the nanocomposite such as synergetic light absorption, efficient charge separation-transfer and resistance toward photocorrosion suggested three possible alternative mechanisms for transferring photogenerated electrons. Ag2CO3@Fe2O3/TiO2-NT nanocomposite may have a potential application for the industrial treatment of wastewater containing toxic organic contamination.
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Affiliation(s)
- H H El-Maghrabi
- Catalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt
| | - A A Al-Kahlawy
- Catalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt
| | - Amr A Nada
- Department of Analysis and Evaluation, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt; EPRI Nanotechnology Center, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt
| | - T Zaki
- Catalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt; EPRI Nanotechnology Center, Egyptian Petroleum Research Institute, Nasr city, 11727, Cairo, Egypt.
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Diab KR, El-Maghrabi HH, Nada AA, Youssef AM, Hamdy A, Roualdes S, Abd El-Wahab S. Facile fabrication of NiTiO3/graphene nanocomposites for photocatalytic hydrogen generation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.07.040] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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El-Maghrabi HH, Barhoum A, Nada AA, Mohamed Moustafa Y, Mikhail Seliman S, Youssef AM, Bechelany M. Corrigendum to “Synthesis of mesoporous core-shell CdS@TiO2 (0D and 1D) photocatalysts for solar-driven hydrogen fuel production” [Journal of Photochemistry and Photobiology A: Chemistry 351 15 january (2018) 261–270]. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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El-Maghrabi HH, Barhoum A, Nada AA, Moustafa YM, Seliman SM, Youssef AM, Bechelany M. Synthesis of mesoporous core-shell CdS@TiO2 (0D and 1D) photocatalysts for solar-driven hydrogen fuel production. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.10.048] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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El-Maghrabi HH, Abdelmaged SM, Nada AA, Zahran F, El-Wahab SA, Yahea D, Hussein GM, Atrees MS. Magnetic graphene based nanocomposite for uranium scavenging. J Hazard Mater 2017; 322:370-379. [PMID: 27776855 DOI: 10.1016/j.jhazmat.2016.10.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 09/21/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
Magnetic graphene based ferberite nanocomposite was tailored by simple, green, low cost and industrial effective method. The microstructure and morphology of the designed nanomaterials were examined via XRD, Raman, FTIR, TEM, EDX and VSM. The prepared nanocomposites were introduced as a novel adsorbent for uranium ions scavenging from aqueous solution. Different operating conditions of time, pH, initial uranium concentration, adsorbent amount and temperature were investigated. The experimental data shows a promising adsorption capacity. In particular, a maximum value of 455mg/g was obtained within 60min at room temperature with adsorption efficiency of 90.5%. The kinetics and isotherms adsorption data were fitted with the pseudo-second order model and Langmuir equation, respectively. Finally, the designed nanocomposites were found to have a great degree of sustainability (above 5 times of profiteering) with a complete maintenance of their parental morphology and adsorption capacity.
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Affiliation(s)
| | | | - Amr A Nada
- Egyptian Petroleum Research Institute, 11727, Cairo, Egypt
| | - Fouad Zahran
- Faculty of Science, Helwan University, 11795, Cairo, Egypt.
| | | | - Dena Yahea
- Faculty of Science, Ain shams University, Cairo, Egypt
| | - G M Hussein
- Nuclear Materials Authority, 6530 P.O. Box Maadi, Cairo, Egypt
| | - M S Atrees
- Nuclear Materials Authority, 6530 P.O. Box Maadi, Cairo, Egypt
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Abstract
Naturally occurring radionuclides (NORs) from the 232Th- and 238U-series, which are omnipresent in the earth's crust, can be concentrated by technical activities, particularly those involving natural resources. Although, a great deal of work has been done in the field of radiation protection and remedial action on uranium and other mines, recent concern has been devoted to the hazard arising from naturally occurring radioactive materials (NORM) in oil and gas facilities. NORM wastes associated with oil and gas operations from scale deposits, separated sludge and water at different oil fields in the eastern and western deserts were investigated. Concentrations of the uranium, thorium, and potassium (40K) series have been determined from high-resolution gamma-ray spectrometry. Total uranium content of samples was determined using laser fluorimetry. The levels of radioactivity were mainly due to enhanced levels of dissolved radium ions. Only minute quantities of uranium and thorium were present. The disequilibrium factor for 238U/226Ra has been determined.
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Affiliation(s)
- S Shawky
- National Center for Nuclear Safety and Radiation Protection, Nasr City, Cairo, Egypt.
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Al-Arfaj AA, Khwaja MS, Al-Mulhim AA, Al-Awad NI, Nada AA, Bahnassy AA. Pediatric inguinal hernia: Outcome of repair. Saudi Med J 1999; 20:504-508. [PMID: 27632451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Full text is available as a scanned copy of the original print version.
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Affiliation(s)
- A A Al-Arfaj
- Division of Pediatric Surgery, King Faisal University, Dammam, Kingdom of Saudi Arabia
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Awad MA, Nada AA, Hamza MS, Froehlich K. Chemical and isotopic investigation of groundwater in Tahta region, Sohag-Egypt. Environ Geochem Health 1995; 17:147-153. [PMID: 24194185 DOI: 10.1007/bf00126083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/1994] [Accepted: 01/31/1995] [Indexed: 06/02/2023]
Abstract
Chemical and isotopic investigations indicate that the recharge source for the groundwater in the Tahta district, adjacent to the Nile, is mainly from the Nile water seeping from irrigation channels. The water's chemical type is sodium bicarbonate, with values of oxygen-18 and deuterium close to that of Nile water. Another minor source of recharge to the far west of the Nile bank is palaeowater. This water's chemical type is sodium sulphate and sodium chloride. The change of water quality in some groundwater samples could be due to the extensive use of fertilizers to improve soil characteristics in new reclamation projects. In addition, these wells are slightly depleted in oxygen-18, deuterium and tritium. Recommendations for the periodic monitoring of groundwater quality for proper use are given.
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Affiliation(s)
- M A Awad
- Siting and Environmental Department, National Center for Nuclear Safety and Radiation Control, Atomic Energy Authority, Nasr City - 19762, P.O. Box 7559, Cairo, Egypt
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