Browsing by Author "Khader, Mahmoud M."
Now showing items 1-20 of 26
-
Activation and stabilization of gallium arsenide anode in an aqueous photoelectrochemical cell
( Elsevier , 2003 , Article)The formation of a porous layer on the surface of gallium arsenide anode, n-GaAs, increases photogenerated currents significantly. This layer was formed as a result of an anodic polarization of illuminated n-GaAs in acidified ... -
Activation and stabilization of gallium arsenide anode in an aqueous photoelectrochemical cell
( Elsevier B.V. , 2003 , Article)The formation of a porous layer on the surface of gallium arsenide anode, n-GaAs, increases photogenerated currents significantly. This layer was formed as a result of an anodic polarization of illuminated n-GaAs in acidified ... -
Catalytic evaluation of Ni-based nano-catalysts in dry reformation of methane
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference)Development of a highly efficient, nickel-based nano-catalyst in the carbon dioxide reformation of methane is reported. The alumina supported Ni-based catalyst with a metal loading of 5wt% was prepared via solution combustion ... -
Catalytic evaluation of nickel nanoparticles in methane steam reforming
( Elsevier , 2016 , Article)Development of a highly efficient and coke-resistant, nickel nanoparticles (Ni.NPs) based catalyst in the steam reformation reaction of methane is reported. The catalyst was prepared by dispersing Ni-nanoparticles over ... -
A comparison of the redox properties of vanadia-based mixed oxides
( American Chemical Society (ACS) , 2015 , Article)The thermodynamics of oxidation and reduction were investigated for a series of vanadium-containing oxides, including CeVO4, LaVO 4, ZrV2O7, Mg3(VO4) 2, CrVO4, AlVO4, and V2O 5, in the temperature range between 873 and 973 ... -
Development of highly active and coke-resilient Ni-based catalysts for low-temperature steam reformation of methane
( Elsevier , 2023 , Article)In this work, we report on the development of highly active and stable catalysts for low temperature steam reformation of methane. The Ni-based catalysts supported on alumina were synthesized by the single step solution ... -
Effect of the length of silicon nano-dot/wire on band gap
( Institute of Electrical and Electronics Engineers Inc. (IEEE) , 2014 , Conference)We will report on the role of the length of silicon nanowire (SNW) in determining the band gap of a structure. We find that the band gap decreases with SNW length for the same diameter and approaches the band gap for an ... -
Formation of arsenic sulfide on GaAs surface under illumination in acidified thiourea electrolytes
( Elsevier , 2011 , Article)The present article reports the formation of arsenic sulfide films on GaAs by the potentiodynamic polarization in acidified thiourea (TU) electrolytes under photo-illumination. Oxidation of TU competes with the oxidation ... -
High-efficiency c-Si based interdigitated point contact back heterojunction solar cells
( Springer New York LLC , 2017 , Article)We report on the modeling and performance optimization studies of point contact back heterojunction (BHJ) solar cells. BHJ solar cell technology is a combination of front heterojunction (a-Si:H/c-Si) solar cell technology ... -
In situ DRIFTS Studies on Cu, Ni and CuNi catalysts for Ethanol Decomposition Reaction
( Springer New York LLC , 2016 , Article)Catalyst nanopowders containing copper and nickel were synthesized using solution combustion synthesis method for hydrogen production from ethanol decomposition. Detailed in situ DRIFTS studies were conducted on three ... -
Kinetics of CO2 Adsorption/Desorption of Polyethyleneimine-Mesoporous Silica
( Wiley-VCH Verlag , 2017 , Article)The kinetics of adsorption of CO2 on solid sorbents based on polyethyleneimine/mesoporous silica (PEI/MPS) was studied by following the mass gain during CO2 flow. Linear (PEI-423) and branched (PEI-10k) polymers were ... -
Modeling of dual-metal Schottky contacts based silicon micro and nano wire solar cells
( Elsevier B.V. , 2014 , Article)We study solar cell properties of single silicon wires connected at their ends to two dissimilar metals of different work functions. Effects of wire dimensions, the work functions of the metals, and minority carrier lifetimes ... -
Modification of Pd/CeO2 catalyst by Atomic Layer Deposition of ZrO2
( Elsevier , 2016 , Article)Modification of a 1 wt% Pd/CeO2 catalyst by Atomic Layer Deposition of thin ZrO2 films was studied. Calcination of the unmodified Pd/CeO2, prepared by precipitation of aqueous Ce(NO3)3 solutions, with Pd added by impregnation, ... -
Ni-based nano-catalysts for the dry reforming of methane
( Elsevier B.V. , 2019 , Article)Development of a highly efficient and coke-resistant, nickel based nano-catalyst in the carbon dioxide reformation of methane is reported. The alumina supported Ni-based catalyst with a metal loading of 5wt% was prepared ... -
Oxygen passivation as effective technique for tailoring the nature of band gap of silicon nanowires
( Institute of Electrical and Electronics Engineers Inc. (IEEE) , 2015 , Conference)Silicon nanowires have been subjected to several experiential and theoretical studies, including chemical tuning with different substituents aiming to tailor the band gap as well as increasing optical absorption efficiency ... -
Photoconductive response of strained silicon nanowires: A Monte Carlo study
( AIP Publishing LLC. , 2014 , Article)Using Ensemble Monte Carlo simulations, the photocurrent in a 500 nm long strained [110] silicon nanowire with diameter of 3.1 nm is investigated. It was observed that a phototransistor based on this nanowire can have ... -
Photoresponse of silicon with asymmetric area contacts
( Institute of Physics Publishing , 2016 , Article)We report on high performance metal-semiconductor-metal (MSM) photosensors based on asymmetric metal pad areas. The reported devices require a single-step metal deposition, and exhibit large photo response even under ... -
Phyllosilicate nanoclay-based aqueous nanoparticle sorbent for CO2 capture at ambient conditions
( Elsevier Ltd , 2017 , Article)We report a new and effective aqueous sorbent for CO2 capture at ambient conditions based on aminopropyl magnesium phyllosilicate nanoparticles (aminoclay). Combining the advantages of both liquid and solid amine sorbents, ... -
Prevention of gallium arsenide photocorrosion by an epoxy adhesion layer
( Elsevier Ltd , 2004 , Article)Coating of gallium arsenide with an adhesion layer of commercial epoxy prevented its photocorrosion. A two-component room temperature curing adhesive paste (Araldite 2014) has been selected. When GaAs/Araldite was employed ... -
Simulation study of Schottky contact based single Si wire solar cell
( IEEE , 2014 , Conference)We model single silicon nanowire (SiNW) solar cells with dissimilar work function metal contacts. Both short circuit current (ISC) and open circuit voltage (VOC) have been investigated. Effects of nanowire dimension, ...
