Abdelrazek Khalil

• Chair at University of Sharjah

In burn wound management, infection poses a significant challenge, accounting for 75% of deaths in burn patients. Silver sulfadiazine is broadly used as an effective antibacterial agent for treating burns. Numerous researchers have explored various dosage forms of silver sulfadiazine, such as cream, ointment, topical spray, and hydrogel, for antimi...

A novel nickel-molybdenum carbide-graphite nanofiber composite is introduced as an electrocatalyst for ethanol electrooxidation. The proposed nanofibers have been prepared by calcinating electrospun nanofibers composed of nickel acetate tetrahydrate, molybdenum chloride, and polyvinyl alcohol. The calcination process was conducted at different temp...

Increased oxidative stress in bone cells is known to negatively alter favorable bone regeneration. This study aimed to develop a porous polycaprolactone (PCL) membrane incorporated with 25 wt % Vitamin C (PCL-Vit C) and compared it to the PCL membrane to control oxidative stress and enhance biomineralization in vitro. Both membranes were characteri...

Capacitive deionization (CDI) is a promising and developing electrochemical technology utilized to desalinate salt water and produce fresh water. Multiple technologies, such as reverse osmosis, humidification-dehumidification, nanofiltration, and multi-stage flash, have been developed for water desalination and treatment. CDI significantly increase...

Oil-contaminated water and industrial oily wastewater discharges have adversely affected aquatic ecosystems and human safety. Membrane separation technology offers a promising solution for effective oil–water separation. Thus, a membrane with high surface area, hydrophilic–oleophobic properties, and stability is a promising candidate. Electrospinni...

Novel nickel-molybdenum carbide-graphite nanofiber composite is introduced as an electrocatalyst to produce green hydrogen from ethanol electrooxidation. The proposed nanofibers have been prepared by calcinating electrospun nanofibers composed of nickel acetate tetrahydrate, molybdenum chloride, and poly (vinyl alcohol). Physicochemical characteriz...

Water shortage has been a severe problem affecting the globe for the past decade. Therefore, appropriate and efficient technologies should be implemented to tackle the water shortage dilemma and to acquire clean water. Several desalination techniques are implemented across the world; among them is capacitive deionization (CDI). CDI is an energy-eff...

Capacitive deionization is an emerging electrochemical technology employed in water desalination applications. Multiple water desalination technologies include reverse osmosis, multi-stage flash, humidification-dehumidification, and nanofiltration. Capacitive deionization is appreciably increased the desalination efficiency compared to other techno...

The existence of an intrinsic electrical platform responsible for the formation and transmission of impulses is essential, especially in cardiac tissue. However, most cardiac tissue made from biodegradable polymeric materials lacks conductive characteristics; this delays regional conduction, potentially causing arrhythmias. This study proposes a co...

Novel (Ca, Mg)CO3&SiO2 NPs-decorated multilayer graphene sheets could be successfully prepared from corn stalk pith using a simple alkaline hydrothermal treatment process followed by calcination in an inert atmosphere. The produced nanocomposite was characterized by SEM, EDX, TEM, FTIR, and XRD analytical techniques, which confirm the formation of...

Dental Pulp Capping: Scan QR Code

This study aimed to develop polycaprolactone (PCL) electrospun membranes coated with mineral trioxide aggregate/hydroxyapatite (MTA/HA) as a potential material for dental pulp capping. Initially, the PCL membrane was prepared by an electrospinning process, which was further surface coated with MTA (labeled as PCLMTA) and HA (labeled as PCLHA). The...

New bio-composite nanofibers composed of polyethylene oxide (PEO)/silk fibroin (SF)/barium titanate (BaTiO3) are introduced in this study. The SF solution was added to the PEO solution to form a PEO/SF blend with different weight percentages (5, 10, 15, 20 wt.%). The PEO/15 wt.% SF blend was selected to continue the experimental plan based on the o...

Carbon nanotubes (CNTs) can be doped or intercalated with nonmetal heteroatoms, metal atoms or metal clusters to act as electron donors or acceptors, analogous to conjugated polymers and graphene. The doped CNTs reveal favorable features including tuned electrical conductivity, more elastic electron conduction, better mechanical stability, and cycl...

In this communication, biodegradable and highly elastic silk fibroin/poly(lactide-co-ε-caprolactone)/polyethylene oxide (SF/PLCL/PEO) tri-polymers composite film was fabricated by sol-gel casting technology. The tri-polymers composite film exhibited a high cycle performance and rapid degradation rate by regulating the content of blending of the thr...

In this study, hydrogen generation was performed by utilizing methylene blue dye as visible-light photosensitizer while the used catalyst is working as a transfer bridge for the electrons to H⁺/H2 reaction. Silica NPs-incorporated TiO2 nanofibers, which have a more significant band gap and longer electrons lifetime compared to pristine TiO2, were u...

The mechanical and ring stiffness of glass fiber pipes are the most determining factors for their ability to perform their function, especially in a work environment with difficult and harmful conditions. Usually, these pipes serve in rough underground environments of desert and petroleum fields; therefore, they are subjected to multi-type deterior...

Composite processing and subsequent characterization of microfibrillar composites (MFC) were the focus of this work. Compression molding of wound MFC filaments was used to fabricate MFC composites. The MFC composites were composed of polypropylene (PP) as matrix materials and polyethylene terephthalate (PET) as reinforcement fibers. The PP/PET blen...

Glass fiber reinforced polymer (GFRP) composite laminates are considered the key material in many industries such as the infrastructure industries and the aerospace sector, and in building structures due to their superior specific strength and lightweight properties. The prediction of specimens’ nominal strength with open holes is still an attracti...

Fibre-reinforced composites FRC’s have now come out as a major class of structural materials being used or regarded as substituent’s for metals in several critical components in space, automotive and other industries (marine, and sports goods) owing to their low density, strength-weight ratio, and fatigue strength. FRC’s have several commercial as...

The concept of microfibrillar composites (MFCs) is adopted to produce composites of polyethylene terephthalate (PET) fiber-reinforced polypropylene (PP) materials. The two polymers were dry mixed with PET content ranging from 22 to 45 wt%. The PET has been used as a reinforcement to improve the mechanical properties of composites. The relationship...

In this study, N-doped and TiO2-decorated graphene oxides were developed as efficient nonprecious electrodes for capacitive deionization. The activity of this new material was evaluated in situ and in vivo. The performance of the synthesized material was measured in different saline solutions (0.1, 0.5 and 1.0 M NaCl) as an electrolyte. The results...

An innovative, biomimetic, green synthesis approach was exploited for the synthesis of humane and environmental friendly nanomaterials for biomedical applications. Ultrafine bonelike apatite (BAp) 2D plate-like structures were prepared using fenugreek seed extract during the biosynthesis wet-chemical precipitation route. The chemical analysis, morp...

The introduction of autonomous vehicles (AVs) has led to a shift in liability from driver to AV. This paper is a systematic review of the literature on liability with AVs. Articles were selected from EBSCO, SCOPUS and PROQUEST and then sorted based on inclusion and exclusion criteria. The findings reveal that most such articles have been published...

Autonomous vehicles (AVs) are the latest trend in the automobile industry. Although the concept has existed since the beginning of the last century, recent technological advancements have enabled the industry to attempt mass introduction of driverless vehicles. This paper reviews the literature to explore those factors that influence the successful...

Light composite materials based on Magnesium matrix reinforced with carbon or ceramic nanofibers were fabricated by powder metallurgy rout using high frequency induction heat sintering (HFIHS) technique. A comprehensive comparative study has been investigated on using ceramic nanofibers and carbon nanofibers as a fibers reinforced Magnesium metal m...

This article has been retracted. The retraction notice is available as errata for this article.

In recent work, we demonstrated the successful fabrication of core-shell nanofiber composites with enhanced tensile, surface wetting and cytocompatibility properties via coaxial electrospinning using PLA and PVA. It has been shown that core/shell-structured PLA/PVA nanofiber mat has the hydrophilic benefits of PVA and the attractive biological prop...

In recent times, much attention has been paid to explore economic and highly active precious metal free electrocatalysts for energy conversion and storage systems due to the expensiveness of Pt-based catalysts. Here we developed a mesoporous core-shell like nanospheres composed of a metallic cobalt oxide core wrapped with a polypyrrole nanoshell (P...

Poly Lactic Acid (PLA) nanofiber scaffold has enjoyed great interest as a candidate bioactive material for tissue regeneration. However, the hydrophobic nature of PLA and its weak mechanical properties with poor ductility and low strength hinder its practical applications. In this study, coaxial electrospinning was used to fabricate core-shell comp...

The objective of this study was targeted to synthesize and characterize a carbon nanotubes (CNTs) incorporated poly(methyl methacrylate) (PMMA)-based denture polymer. Two experimental denture base polymers were fabricated either by incorporating single-walled CNTs (SWCNTs) (SW-group) or multi-walled CNTs (MWCNTs) (MW-group). In both groups, 0.5 wt%...

The performance polymer electrolyte membrane fuel cells (PEMFCs) and alkaline fuel cells (AFCs) relays on the kinetics of oxygen reduction reaction at the cathode side of the fuel cell. Efficient electrocatalyst with high activity and selectivity are of great importance to achieve ORR with four-electron reaction pathway. Targeting robust and cost-e...

Oxygen reduction reaction (ORR) catalysts are the heart of eco-friendly energy resources particularly low temperature fuel cells. Although valuable efforts have been devoted to synthesize high performance catalysts for ORR, considerable challenges are extremely desirable in the development of energy technologies. Herein, we report a simple self-pol...

Enhancing the cytocompatibility profiles including cell attachment, growth and viability of designed synthetic scaffolds have a pivotal role in tissue engineering applications. Polymer blending is one of the most effective methods for providing new desirable biomaterials for tissue scaffolds. This article reports a novel polyamide 6/ poly(Ɛ-caprola...

Herein, novel hybrid nanomaterials were developed for wound dressing applications with antimicrobial properties. Electrospinning was used to fabricate a double layer nanocomposite nanofibrous mat consisting of an upper layer of poly(vinyl alcohol) and chitosan loaded with silver nanoparticles (AgNPs) and a lower layer of polyethylene oxide (PEO) or...

Developing efficient electrocatalysts for practical applications in energy conversion and storage systems is receiving considerable attention. In the present study, graphene oxide supported cobalt hydroxide (GO/Co(OH)2) hybrid was developed by a facile surfactant-assisted hydrothermal method as an electrocatalyst for ethanol oxidation reaction. Ele...

إن الطاقة الكهروضوئية تشكل جزءاً مهماً من التوجه البحثي الدولي للحد من اعتماد العالم على الوقود الأحفوري، وهو التحدي البيئي الأكثر أهمية. كما أن زيادة الكفاءة الضوئية، مع العمل على خفض تكاليف إنتاج الخلايا الشمسية وتصغير حجمها، يعد أمراً أساسياً للوصول إلى نطاق الطاقة بالتيراوات. ويناقش كتاب"مواد الخلايا الشمسية: تقنيات التطوير"، وأحدث التطورات للح...

The glucose electrooxidation reaction at NiOx nanoparticles loaded on a nitrogen-doped carbon nanofber (N-CNF)-modifed glassy carbon electrode (NiOx@N-CNF/GCE) in an alkaline medium was studied. The N-CNF was produced by an electrospinning technique to acquire a large surface area. The produced electrode was characterized by X-ray diffraction (XRD)...

Correction for ‘A novel strategy for enhancing the electrospun PVDF support layer of thin-film composite forward osmosis membranes’ by M. Obaid et al., RSC Adv., 2016, 6, 102762–102772.

Chemical doping is a widely-used strategy to improve the performance of TiO2 for the dye-sensitized solar cells (DSCs). However, the effect of two efficient dopants has been rarely investigated. We present the synthesis of GO@SnO2/TiO2 nanofibers (NFs) by a facile method using electrospinning and hydrothermal processes. The synthesized NFs are desc...

Development of bioinspired or biomimetic materials is currently a challenge in the field of tissue regeneration. In-situ 3D biomimetic microporous nanocomposite scaffold has been developed using a simple lyophilization post hydrothermal reaction for bone healing applications. The fabricated 3D porous scaffold possesses advantages of good bonelike a...

In this study, Ni/Pd-decorated carbon nanofibers (NFs) were fabricated as an electrocatalyst for methanol oxidation. These NFs were synthesized based on carbonization of poly(vinyl alcohol), which has high carbon content compared to many polymers used to prepare carbon NFs. Typically, calcination of an electrospun mat composed of nickel acetate, pa...

The design of cheap and efficient oxygen reduction reaction (ORR) electrocatalysts is of a significant importance in sustainable and renewable energy technologies. Therefore, ORR catalysts with superb electrocatalytic activity and durability are becoming a necessity but still remain challenging. Herein, we report C/NiCo2O4 nanocomposite fibers fabr...

Biopolymer Composites in Electronics examines the current state-of-the-art in the electronic application based on biopolymer composites. Covering the synthesis, dispersion of fillers, characterization and fabrication of the composite materials, the book will help materials scientists and engineers address the challenges posed by the increased use o...

TiC nanofibers reinforced Al matrix composites were produced by High Frequency Induction Heat Sintering (HFIHS).The titanium carbide nanofibers with an average diameter of 90 nm are first prepared by electrospinning technique and high temperature calcination process. A composite solution containing polyacrylonitrile and titanium isopropoxide is fir...

In the present work, metallic foams of Al, Mg and an Al-SiC nanocomposite (MMNC) have been fabricated using a new manufacturing technique by employing melt infiltration assisted with an electromagnetic force. The aim of this investigation was to study and to develop a reliable manufacturing technique consisting of different types of metallic foams....

In this study, three aluminum-titanium carbide (Al-TiC) composites having the chemical composition of Al-15%TiC, Al-25%TiC, and Al-35%TiC were manufactured. The powders of the composites were ball milled in situ using a high energy ball mill and melted in a high frequency induction heat furnace before being consolidated at 1300 ºC. The effect of in...

This article demonstrates the use of hybrid nanofibers to improve the biodegradation rate and biocompatibility of AM50 magnesium alloy. Biodegradable hybrid membrane fiber layers containing nano-hydroxyapatite (nHA) particles and poly(lactide)(PLA) nanofibers were coated layer-by-layer (LbL) on AM50 coupons using a facile single-step air jet spinni...

The use of commercially available cation and anion exchange membranes to generate power from industrial wastewater obtained from three different industries (food, alcohol and dairy factories) without the addition of external microorganisms or chemicals by using microbial fuel cells (MFCs) was investigated. The results indicate that the original mix...

إنَّ الطاقة الحيوية (الوقود الحيوي)، المشتقة من مواد خام مُتجدِّدة، كالنفايات، والمخلَّفات الحيوية، والكتلة الحيوية، تعدُّ من أكثر البدائل الواعدة لإنتاج الطاقة. وتوفر فصول هذا الكتاب أحدثَ استعراضٍ، ومسحٍ للبحوث والتطوُّرات التقنية، فيما يتعلق بالجيلين الثاني والثالث من الوقود الحيوي والطاقة الحيوية، كما تعرِض الاتجاهات البحثية الحالية والمستقبلية...

A simple and novel treatment methodology is introduced to produce PVDF-based thin-film composite forward osmosis (TFC-FO) electrospun membranes for enhanced desalination performance. The proposed treatment strategy is based on improving the surface properties of the PVDF electrospun nanofiber support layer using triethylamine (TEA). The results ind...

A novel attempt is made to study and compare the effects of TiO2 morphology in the form of nanoparticulates and nanofibers on the physical, mechanical and microstructural properties of pure magnesium. Pure magnesium and Mg (1.98 and 2.5) vol. % TiO2 nanocomposites are synthesized by powder metallurgy technique coupled with microwave sintering follo...

Novel amorphous silica nanoparticles-incorporated poly(vinylidine fluoride) electrospun nanofiber mats are introduced as effective membranes for forward osmosis desalination technology. The influence of the inorganic nanoparticles content on the water flux and salt rejection was investigated by preparing electrospun membranes having 0, 0.5, 1, 2 an...

Ruthenium hydrazone complexes [RuH(CO)(L1)(PPh3)2] (1) and [RuH(CO)(L2)(PPh3)2] (2) synthesized by reacting [RuHCl(CO)(PPh3)3] with benzoic acid[(thiophene-2-yl)methylene] hydrazide (HL1) or benzoic acid[1-(furan-2-yl)methylene]hydrazide (HL2) were characterized by elemental analysis, IR spectral, and XRD techniques. An intercalative interaction of...

Al–TiC nanocomposite materials have been prepared by a new in situ synthesizing technique. A mixture of aluminum, titanium, and graphite has been prepared using ball milling technique and then melted in a high frequency induction heat furnace (HFIHF) at different sintering temperatures, namely 900, 1100, and 1300 °C. The effect of sintering tempera...

High-frequency induction heat sintering (HFIHS) technology was employed for fabrication of highly dense (N 99.5%) graphene-reinforced alumina nanocomposites. The mixed powders were consolidated at temperatures up to 1500 °C with 0.25 to 3.0 wt.% exfoliated graphene nanosheets (GNS). Compared with monolithic alumina, there was grain size refinement...

Transient liquid phase (TLP) bonding process was applied to join magnesium alloy AZ31 samples with minimum microstructural changes. The magnesium samples were coated by 5μm nickel prior to the TLP bonding. Bonding conditions of 8MPa uniaxial pressure and 520°C bonding temperature were applied for all bonds at various bonding times. The microstructu...

Aluminum-Carbon composites with different weight ratio of carbon fiber were fabricated using powder metallurgy route. The mixture powders were consolidated using heat induction furnace under vacuum at temperature of 600°C and pressure 50MPa. Two different aspect ratio of carbon fiber were used in this study; namely 12 and 20. The mechanical propert...

Hydrophobicity of polysulfone is the main constraint facing wide application in the most important field; water treatment, although this polymer shows promising characteristics to be used in different separation technologies. In this study, super-hydrophilic polysulfone nanofiber mats are introduced using novel modifications. The introduced nanofib...

Well-dispersed ZnO(x)CeO2(1-x) nanodots@ carbon nanofibers as anode catalysts for the electrooxidation of methanol were synthesized by an easy-controlled template-free method. Their structure and morphology were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), field-emission scanning electron micr...

The as-received metal powders were used to synthesis bulk nanocrystalline Al; Al-10%Cu; and Al-10%Cu-5%Ti alloys using mechanical alloying and high frequency induction heat sintering. The corrosion of these materials in natural Arabian Gulf seawater (AGS) has been investigated using different electrochemical and spectroscopic techniques. The impeda...

A facile synthesis approach was successfully used for the fabrication of Ag/SiO2 (nanofibers, NFs and nanoparticles, NPs) composite using a simple hydrothermal plasma method with the aid of stabilizing function and reducing agent of triethoxyvinylsilane (C8H18O3Si) and black carbon powder, respectively. The new synthesis approach proposed in this s...

In this study, an adsorptive ceramic membrane was prepared by a simple dry pressing of a mixture of nano silica produced from low cost rice husk by hydrothermal technique at sub-critical water conditions, calcium phosphate, and ammonium acetate together and then calcined at 600 °C in air. Optimization of the raw materials ratio was found to be nece...

Novel photocatalyst membrane materials were successfully fabricated by an air jet spinning (AJS) technique from polyvinyl acetate (PVAc) solutions containing nanoparticles (NPs) of titanium dioxide (TiO2). Our innovative strategy for the production of composite nanofibres is based on stretching a solution of polymer with a high-speed compressed air...

Polyacrylonitrile (PAN) nanofibers were produced by an electrospinning technique and directly deposited onto carbon fabric to improve the load bearing strength of pin joined composite laminates. Two types of specimens, virgin laminates and nano-modified laminates, were prepared. A modified carbon fiber reinforced polymer (CFRP) laminate was fabrica...

In the present study, 2D micro- and nanofibrous polycaprolactone (PCL) scaffolds were fabricated using the electrospinning technique. The thermal, microstructure and mechanical properties of the fabricated micro- and nanofibrous scaffolds were assessed using structural/phase, elemental, morphological characterizations and micro-universal testing ma...

Calcium carbonate nanoparticles and nanorods were synthesized by precipitation from saturated sodium carbonate and calcium nitrate aqueous solutions through co precipitation method. A new route of synthesis was done by using pulse mode feeding of calcium nitrate. The effect of the agitation speed, and the temperature on particle size and morphology...

NiCo nanoparticles(NPs)-doped carbon nanofibers were synthesized by calcination of electrospun nanofibers composed of nickel acetate, cobalt acetate and poly(vinyl alcohol) in argon atmosphere and used as an efficient and alternative Pt-free electrocatalyst as counter electrode materials for dye-sensitized solar cells (DSSCs). Structural and electr...

A Facile and efficient method to fabricate rGO/TiO 2 nanorod sandwich morphology • Desalination performance and electrosorption capacity were investigated in MCDI unit. • The nanocomposite showed high electrochemical performance compared to pristine graphene. • Excellent stability, high recyclability and full regeneration phase were observed. a b s...

The current study investigated the influence of milling time and ball-to-powder (BPR) weight ratio on the microstructural constituents and mechanical properties of bulk nanocrystalline Al; Al-10%Cu; and Al-10%Cu-5%Ti alloys. Powder consolidation was carried out using a high frequency induction heat sintering where the processed metal powders were s...

The effect of an electromagnetic field (EMF) on the rate of copper(II) cementation from copper sulfate solutions on a rotating iron cylinder was investigated. The studied variables were cylinder rotation speed, magnetic field strength, and magnetic field direction. The application of EMF increased the rate of cementation in both parallel and perpen...

For DSSCs application, highly efficient photoelectrode based on nitrogen (N) and graphene oxide (GO) co-incorporated TiO2 nanofibers were synthesized successfully by two simple successive methods; electrospinning followed by hydrothermal processes. The influence of the N and GO co-incorporation on the morphology, crystal structure and optical behav...

Membrane technology is the most promising process for oil/water separation operation if the hydrophilicity, fouling and reusability properties could be improved. In this study, novel effective and reusable membrane for oil-water separation process is introduced based on modification of polysulfone (PSF) electrospun nanofiber mats. The modification...

In this study, we compared the electrochemical corrosion behavior of a newly fabricated nanocrystalline pure aluminum to another microcrystalline aluminum using various electrochemical techniques in natural Arabian Gulf seawater. The nanocrystalline Al was fabricated using mechanical alloying technique. Cyclic potentiodynamic polarization showed th...

A porous surface of Ti-HA composite was successfully fabricated by pulsed current activated sintering (PCAS), followed by leaching using diluted H3PO4. The Ti and HA powders were mixed at different contents of the HA, Ti-5, 10, 30 and 40wt% HA powders. The mixed powders were pressed in a coated graphite die using pulsed current activated sintering...

A novel simple in situ biomimetic strategy used for the first time for rapid induction of bonelike apatite nanosized into the chitosan (CTS) matrix. The precipitated particles from the surrounding simulated body fluid within polymer matrix during the hydrothermal process showed a uniform distribution and perfect matching with bonelike minerals. The...

In this study the formation of porous Ti-10wt.%Y2O3 nanostructure biomaterial was described. After high-energy ball milling of a Ti-Y2O3 for 24 h, powder mixture was pressed and sintered to consolidate the granules. Mechanically alloyed Ti-Y2O3 has nanostructure with grain size in the range of 150 nm and large grain boundaries volume fraction, whic...

RSC Advances This is an Accepted Manuscript, which has been through the Royal Society of Chemistry peer review process and has been accepted for publication. Accepted Manuscripts are published online shortly after acceptance, before technical editing, formatting and proof reading. Using this free service, authors can make their results available to...

Capacitive deionization (CDI) is a second generation electrosorption technique for removing the salt ions from the brackish water. Among the carbonaceous materials, graphene can be considered to be a promising CDI electrode material due to its exceptional physical properties and chemical tenability. In this study, graphene/tin dioxide nanoparticles...

Aluminum-Carbon composites with different weight ratio of carbon fiber were fabricated using powder metallurgy route. The mixture powders were consolidated using heat induction furnace under vacuum at temperature of 600°C and pressure 50 MPa. Two different aspect ratio of carbon fiber were used in this study; namely 12 and 20. The mechanical proper...