Browsing by Author "Al-Qaradawi, Siham"
Now showing items 1-20 of 30
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A study of low-temperature CO oxidation over mesoporous Cuo-TiO2 nanotube catalysts
Zedan, Abdallah F.; Allam, Nageh K.; AlQaradawi, Siham Y. ( MDPI AG , 2017 , Article)Supported copper oxide nanoparticles have attracted considerable attention as active and non-precious catalysts for many catalytic oxidation reactions. Herein, mesoporous xCuO-TiO2 nanotube catalysts were fabricated, and ... -
Addressing scale-up challenges and enhancement in performance of hydrogen-producing microbial electrolysis cell through electrode modifications
Al-Qaradawi, Siham; Chae, Kyu-Jung; Sung-Gwan, Park; Rajesh, P. P.; Young-Uk, Sim; Dipak A., Jadhav; Md. Tabish, Noori; Dong-Ho Kim; Jae-Kyung, Jang... more authors ... less authors ( Elsevier , 2022 , Article Review)Bioelectrohydrogenesis using a microbial electrolysis cell (MEC) is a promising technology for simultaneous hydrogen production and wastewater treatment which uses electrogenic microbes. Microbial activity at the anode and ... -
Charge-transfer complexes formed in the reaction of 1,4,7,10-tetraazacyclododecane with π-electron acceptors
AlQaradawi, Siham Y.; Mostafa, Adel; Bazzi, Hassan S. ( Elsevier , 2013 , Article)Abstract The reactions of the electron donor 1,4,7,10-tetraazacyclododecane (TACDD) with the π-electron acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-p-benzoquinone ... -
Charge-transfer complexes formed in the reaction of 2-amino-4-ethylpyridine with π-electron acceptors
AlQaradawi, Siham Y.; Mostafa, Adel; Bengali, A.A. ( Elsevier , 2016 , Article)Molecular charge-transfer complexes (CT) of electron donor 2-amino-4-ethylpyridine (2A4EPy) with π-acceptors tetracyanoethylene (TCNE), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and 2,4,4,6-tetrabromo-2,5-cyclohexadienone ... -
Charge-transfer complexes of 4-methylpiperidine with σ- and π-acceptors
AlQaradawi, Siham Y.; Mostafa, Adel; Bazzi, Hassan S. ( Elsevier B.V. , 2015 , Article)The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 4-methylpiperidine (4MP) with the σ-electron acceptor iodine and π-acceptors 7,7,8,8-tetracyanoquinodimethane (TCNQ), ... -
Conjugated Copolymers of Vinylene Flanked Naphthalene Diimide
Fe, Zhupingi; Han, Yang; Martin, Jaime; Scholes, Fiona H.; Al-Hashimi, Mohammed; AlQaradawi, Siham Y.; Stingelin, Natalie; Anthopoulos, Thomas D.; Heeney, Martin... more authors ... less authors ( American Chemical Society , 2016 , Article)We report the synthesis of a novel naphthalene diimide (NDI) monomer containing two (tributylstannyl)vinyl groups. The utility of this building block is demonstrated by its copolymerization with five different electron-rich ... -
Doping of Large Ionization Potential Indenopyrazine Polymers via Lewis Acid Complexation with Tris(pentafluorophenyl)borane: A Simple Method for Improving the Performance of Organic Thin-Film Transistors
Han, Yang; Barnes, George; Lin, Yen-Hung; Marti, Jaime; Al-Hashimi, Mohammed; AlQaradawi, Siham Y.; Anthopoulos, Thomas D.; Heeney, Martin... more authors ... less authors ( American Chemical Society , 2016 , Article)Molecular doping, under certain circumstances, can be used to improve the charge transport in organic semiconductors through the introduction of excess charge carriers which can in turn negate unwanted trap states often ... -
Fast and Scalable Synthesis of LiNi0.5Mn1.5O4 Cathode by Sol-Gel-Assisted Microwave Sintering
Nisar, Umair; Al-Hail, Sara Ahmad J. A.; Kumar, Petla Ramesh; Abraham, Jeffin James; Mesallam, Saoud M. A.; Shakoor, Rana Abdul; Amin, Ruhul; Essehli, Rachid; Al-Qaradawi, Siham... more authors ... less authors ( John Wiley and Sons Inc , 2021 , Article)High-voltage spinel LiNi0.5Mn1.5O4 (LNMO) is a promising cathode material for high-energy-density and high-power-density lithium-ion batteries (LIBs). The high cost of the currently available LIBs needs to be addressed ... -
Graphene wrapped Y2O3 coated LiNi0.5Mn1.5O4 quasi-spheres as novel cathode materials for lithium-ion batteries
Tariq, Hanan Abdurehman; Abraham, Jeffin James; Quddus, Aisha Abdul; AlQaradawi, Siham; Kahraman, Ramazan; Shakoor, R.A.... more authors ... less authors ( Elsevier Editora Ltda , 2021 , Article)LiNi0.5Mn1.5O4 with a high-voltage spinel structure is a potential cathode material for high-energy lithium-ion batteries (LIBs). Y2O3 coated quasi-spheres of LiNi0.5Mn1.5O4 covered in graphene (LNMO-YO-G) have been ... -
Natural clay-supported palladium catalysts for methane oxidation reaction: Effect of alloying
Ahmad, Yahia H.; Mohamed, Assem T.; Mahmoud, Khaled A.; Aljaber, Amina S.; Al-Qaradawi, Siham Y. ( Royal Society of Chemistry , 2019 , Article)The catalytic combustion of methane (CCM) has been extensively studied owing to the wide use of methane in motor vehicles and power generation turbines. However, the absence of polarizability and the high C-H bond strength ... -
Novel charge transfer complexes of the donor 1,4,7,10,13,16-hexamethyl-1,4,7,10,13,16-hexaazacyclooctadecane and the acceptors iodine, TCNE, and TCNQ
AlQaradawi, Siham Y.; Bazzi, Hassan S.; Mostafa, Adel; Nour, El-Metwally ( Elsevier , 2011 , Article)Abstract Novel charge transfer complexes have been formed in the reaction of the interesting powerful electron donor 1,4,7,10,13,16-hexamethyl-1,4,7,10,13,16-hexaazacyclooctadecane (HMHACOD) with σ-electron acceptor iodine ... -
Photocatalytic degradation of methyl orange as a model compound
Al-Qaradawi, Siham; Salman, Salman R. ( Elsevier , 2002 , Article)Titanium dioxide (TiO2) was used as a photocatalyst for the detoxification of water containing methyl orange (MO), which was used as a model compound. Solar radiation was used as an irradiation source. It was found that ... -
Rapid microwave assisted sol-gel synthesis of CeO2 and CexSm1-xO2 nanoparticle catalysts for CO oxidation
Polychronopoulou, K.; Zedan, Abdallah F.; Katsiotis, M.S.; Baker, M.A.; AlKhoori, A.A.; AlQaradawi, Siham Y.; Hinder, S.J.; AlHassan, Saeed... more authors ... less authors ( Elsevier , 2016 , Article)CeO2 and CexSm1-xO2 nanoparticle mixed oxides have been synthesized by microwave assisted sol-gel (MW sol-gel) and conventional sol-gel synthesis carried out at 60°C (typical sol-gel) and 100°C (approaching the MW temperature). ... -
Rational one-step synthesis of porous PtPdRu nanodendrites for ethanol oxidation reaction with a superior tolerance for CO-poisoning
Eid, Kamel; Ahmad, Yahia H.; Yu, Hongjie; Li, Yinghao; Li, Xiaonian; AlQaradawi, Siham Y.; Wang, Hongjing; Wang, Liang... more authors ... less authors ( Royal Society of Chemistry , 2017 , Article)Precise fabrication of porous ternary Pt-based nanodendrites is very important for electrochemical energy conversion owing to high surface area and great molecular accessibility of these nanodendrites. Herein, PtPdRu porous ... -
Silver Nanoparticles-Decorated Titanium Oxynitride Nanotube Arrays for Enhanced Solar Fuel Generation
Soliman, Khaled A.; Zedan, Abdallah F.; Khalifa, Ahmed; El-Sayed, Hany A.; Aljaber, Amina S.; AlQaradawi, Siham Y.; Allam, Nageh K.... more authors ... less authors ( Nature Publishing Group , 2017 , Article)We demonstrate, for the first time, the synthesis of highly ordered titanium oxynitride nanotube arrays sensitized with Ag nanoparticles (Ag/TiON) as an attractive class of materials for visible-light-driven water splitting. ... -
SiO2 Coated Li-rich Layered Oxides-Li1.2Ni0.13Mn0.54Co0.13O2 for efficient energy storage applications
James Abraham, Jeffin; Nisar, Umair; Monawwar, Haya; Abdul Quddus, Aisha; Shakoor, Abdul; Saleh, Mohamed; Kahraman, Ramazan; Al-Qaradawi, Siham; Aljaber, Amina... more authors ... less authors ( Qatar University Press , 2020 , Poster)Lithium ion batteries (LIBs) are attractive for energy storage application. In this regard, lithium rich layered oxides (LLOs), are considered viable cathodes due to their tempting properties such as lower production cost, ... -
Solution combustion synthesis of Ni-based hybrid metal oxides for oxygen evolution reaction in alkaline medium
Abu Hatab, Aymen S; Ahmad, Yahia H; Abdul Rahman, Mohd B; Al-Qaradawi, Siham Y ( The Royal Society of Chemistry , 2022 , Article)Oxygen evolution reaction (OER) has arisen as an outstanding technology for energy generation, conversion, and storage. Herein, we investigated the synthesis of nickel-based hybrid metal oxides (NixM1−xOy) and their catalytic ... -
Spectrophotometric and thermal studies on the charge – Transfer complexes of 4-(aminomethyl) piperidine as donor with σ- and π-electron acceptors
Mostafa, Adel; El-Ghossein, Nada; AlQaradawi, Siham Y. ( Elsevier , 2014 , Article)The spectroscopic characteristics of the solid charge-transfer molecular complexes (CT) formed in the reaction of the electron donor 4-(aminomethyl) piperidine (4AMP) with the σ-acceptor iodine and the π-acceptors ... -
Spectroscopic investigation of the charge-transfer interactions between 1,4,7-trimethyl-1,4,7-triazacyclononane and the acceptors iodine, TCNE, TCNQ and chloranil
AlQaradawi, Siham Y.; Nour, E.M. ( Elsevier , 2007 , Article)The interaction of the interesting polynitrogen cyclic base 1,4,7-trimethyl-1,4,7-triazacyclononane (TMTACN) with the σ-acceptor iodine and π-acceptors tetracyanoethylene (TCNE), 7,7,8,8-tetracyanoquinodimethane (TCNQ) and ... -
Spectroscopic investigation of the novel charge-transfer complex [(phen)(TCNE)12] formed in the reaction of phenacetin with tetracyanoethylene
AlQaradawi, Siham Y.; Nour, El-Metwally ( Elsevier , 2005 , Article)The charge-transfer (CT) interaction of the electron donor phenacetin (phen) and the π-electron acceptor tetracyanoethylene (TCNE) has been studied in CH2Cl2. The results obtained indicate the formation of the novel ...