Ahmed Bahgat Radwan

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Verified

Ahmed verified their affiliation via an institutional email.

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• PhD Science
• Senior Researcher at Qatar University

Electrochemical water splitting has emerged as a promising solution for sustainable hydrogen production, but the development of efficient, durable, and cost-effective bifunctional electrocatalysts remains a critical challenge. In this work, we report the novel fabrication of composite materials consisting of nickel molybdate (NiMoO4) coated with po...

The development of efficient, stable, and cost-effective electrocatalysts is crucial for advancing water-splitting technologies toward sustainable hydrogen production. This study introduces nickel molybdate nanorodnanoflower (NiMoO4 NRFs) blends decorated with copper nanodots (Cu NDs) on nickel foam (NF) as a dual electrocatalyst. Under alkaline co...

Hydrogen is emerging as a promising alternative to fossil fuels in the transportation sector.This study evaluated the feasibility of establishing hydrogen refueling stations in five cities in Oman, Duqm, Haima, Sur, Al Buraymi, and Salalah, using Hybrid Optimization of Multiple Electric Renewables (HOMER) software. Three hybrid energy systems, phot...

Background Sustainable synthesis of γ-valerolactone (GVL) from levulinic acid (LA) offers a sustainable approach to converting biomass-derived feedstocks into valuable chemicals and fuel additves. Cu-Hydroxyapatite (Cu-HAp) catalysts are potential candidates for vapor-phase hydrogenation of LA to GVL due to their enhanced catalytic activity and sel...

Steel pipeline systems carry about three-quarters of the world’s oil and gas. Such pipelines need to be coated to prevent corrosion and erosion. An alternative to the current epoxy-based coating, a multi-layered composite coating is developed in this research. The composite coatings were made from carbon fiber-reinforced thermoplastic polymer (CFRT...

This study delves into the realm of advanced corrosion protection by investigating the synergistic impact of mesoporous coating and corrosion inhibitor integrated into epoxy formulations. The research explores the unprecedented levels of corrosion resistance achieved through this novel combination, aiming to unravel the mechanisms and interactions...

“Guest Editor of Topical Collection “Advanced Materials and Surface Engineering: Innovations in Self-Healing Coatings, Electrodeposition, and Biodegradable Alloys” in Discover Electrochemistry (Springer Nature)”.

This study successfully synthesized ZnO–CuO nanocomposite using the hydrothermal method with Carica papaya leaf extract. The incorporation of the leaf extract significantly enhanced the nanocomposite properties, a novel approach in scientific research. Characterization techniques, including X-ray diffraction, Fourier Transmission Infrared spectrosc...

Martensitic and super martensitic stainless steels are widely used in the oil and gas industry for general corrosion mitigation in the presence of sweet corrosion (CO2) and sour corrosion (H2S), providing a cost-effective alternative to more expensive exotic corrosion-resistant alloys. Martensitic stainless steel is an approved material for constru...

In the present investigation, aluminum metal matrix composites (AMMs) reinforced with aluminum nitride (AlN) nanoparticulates at different volumetric ratios of (0, 0.5, 1, 1.5, and 2 vol.%) were manufactured via a microwave-assisted powder metallurgy technique. The morphological, physical, mechanical, and electrochemical properties of the produced...

This study explores the synthesis and application of Pd-doped CuO-ZnO composites for the simultaneous photodegradation of anionic and neutral dyes. The nanocomposite was synthesized using a hydrothermal technique and characterized using XRD, FTIR, and UV-Vis absorption spectra. Photocatalytic degradation experiments were conducted with varying cata...

Despite the negative effects of its emissions on the environment, diesel generators have been widely used in Oman’s rural areas for years. Oman’s vision for 2040 includes the promotion of renewable energy sources to reduce the environmental impact of fossil fuels. This article explores the potential of three hybridized energy systems for implementa...

In this research work, we have studied the impact of Yttrium nanoparticles loaded with corrosion inhibitors dodecylamine (DOC) incorporated in polyolefin for the corrosion protection of steel. The surface analysis of pure polyolefin and polyolefin-Y 2 O 3 -DOC composite coatings by atomic force spectroscopy (AFM) shows that both of the coated sampl...

Ti3C2Tx (MXene) is prone to surface oxidation because of the presence of oxygen surface terminals in its surfaces. In this work, the effect of oxygen surface terminals has been reduced by replacing it with other surface terminals or thin layers of heteroatom at the interlayers. These resulted in increasing the interlayer spacing from 9.3 Å up to 12...

γ-valerolactone (GVL) is a crucial chemical feedstock used in the production of fuel additives, renewable fuels, and fine chemicals alternative to petroleum-based solvents and chemicals, supporting the transition to sustainable energy solutions. It is promptly acquired by hydrogenating levulinic acid (LA) in a gaseous or liquid phase with a homogen...

The inhibitory impact of the two synthesized pyrazole derivatives (3 and 4) toward metallic and microbial corrosion was investigated. Using open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy, it was possible to determine their ability to prevent the corrosion of C-steel in 1 M HCl, which was significant...

In recent years, copper-based nanomaterials have gained significant attention for their practical applications due to their cost-effectiveness, thermal stability, selectivity, high activity, and wide availability. This review focuses on the synthesis and extensive applications of copper nanomaterials in environmental catalysis, addressing knowledge...

Copper-based nanomaterials in the last decade attracted many researchers due to their extensive practical applications, unique, inexpensiveness, and wide availability. In addition to this, copper-based nanomaterials possess good thermal stability, and selectivity and also possess high activity. This review emphasis on the recent advances in the syn...

Surface modification of Ti3C2Tx greatly enhances its charge storage mechanism as an electrode material. Herein, we demonstrate the role of surface terminals and heteroatoms in the electrochemical behavior of Ti3C2Tx electrodes. The abundance of –F and –OH surface terminals may be obtained with an acidic or base medium while etching of Ti3C2Tx. Furt...

Currently, permanent vascular stents are fabricated using titanium and stainless steel implants that are nondegradable and offer high stability, but they have certain disadvantages. For example, the prolonged exposition of aggressive ions in the physiological media and the existence of defects in the oxide film create conditions for corrosion to oc...

One of the most significant industrial processes is the catalytic methanol synthesis from carbon dioxide because methanol is a future energy carrier for producing fuels and high-value-added commodities, the so-called “methanol economy” is carbon neutral. As a solution to climate change, the widespread belief that carbon dioxide can be recycled by h...

Modified 13Cr martensitic stainless steels (UNS S41426) are a class of materials used for operations involving natural gas production in sweet and moderately sour service conditions. Discrepancies between experimental results and field services have posed problems in identifying the window of service with experiments often overestimating these resu...

Nanomaterials have assumed an imperative part in the advancement of human evolution and are more intertwined in our thinking and application. Contrary to the conventional micron-filled composites, the unique nanofillers often modify the properties of the polymer matrix at the same time, bestowing new functionality because of their chemical composit...

Due to the expansion of industry, the world's population growth has led to increased air and water contamination. Because they are poisonous and non-biodegradable, organic dyes are a significant source of this contamination. Studies have concentrated on photocatalysts to transform organic dyes into innocuous compounds in order to lessen the harm th...

Hydrogen embrittlement is a widely known phenomenon in high-strength and storage materials. Hydrogen embrittlement is responsible for subcritical crack growth in material, fracture initiation, subsequent loss in mechanical properties, and catastrophic failure. Hydrogen is induced in the material during an electrochemical reaction between the hydrog...

The limits and nature of the passive behavior exhibited by modified martensitic stainless steels (MMSS) is studied in brine solutions at different temperatures using electrochemical methods and the point defect model (PDM), in an environment at pH is 3 and temperatures up to 150°C, using autoclaves with CO2 gas up to 2.8 MPa. The results show that...

Advances in nanotechnology have prompted the use of various types of nanomaterials as excellent electrode materials for enhancing electrochemical detection in terms of electrocatalytic activity, sensitivity , selectivity, and long-term stability of electrochemical sensors and biosensors. In particular, two-dimensional layered materials (2DLMs) are...

In recent years, functionalized metal oxides have been gaining popularity for biomass conversion to fuels and chemicals due to the global energy crisis. This study reports a novel catalyst based on noble metal immobilization on functionalized zirconia that has been successfully used in the production of biofuel alkyl levulinates (ALs) from lignocel...

2-Methyltetrahydrofuran (MTHF) is a desirable biomass-based platform chemical with excellent potential as an ideal biofuel, green solvent, and raw material for synthesizing downstream chemicals. In this work, a series of copper nanoparticles encapsulated on SiO2 were prepared by the wet impregnation method and evaluated as efficient non-noble metal...

This work reports the development and characterization of Ni–P coatings with varying concentrations of hafnium carbide nanoparticles (HCNPs). Novel Ni–P-HCNPs nanocomposite coatings were developed on the A36 carbon steel by an electroless deposition technique. The effect of an increasing amount of HCNPs (0.25g/L, 0.50g/L, 0.75g/L, and 1.00g/L) on s...

Corrosion is a significant problem and is, to a large extent, responsible for the degradation of metallic parts. In this direction, mesoporous silica particles (MSPs) were synthesized by a sol-gel technique and had an average pore diameter of ∼6.82 nm. The MSPs were loaded with polyethyleneimine (PEI) and epoxy monomers and, after that, carefully m...

The valuable products produced from glycerol transformation have become a research route that attracted considerable benefits owing to their huge volumes in recent decades (as a result of biodiesel production as a byproduct) as well as a myriad of chemical and biological techniques for transforming glycerol into high-value compounds, such as fuel a...

Hydrogen is one of the energy carriers that can be produced using different techniques. Combining multiple energy sources can enhance hydrogen production and meet other electrical demands. The hybrid arrangement allows the produced hydrogen to be stored and used when the electrical energy sources are not adequate. In this study, utilizing the meteo...

Pitting corrosion is a significant concern for the broader application of stainless steel in modern industries in which metal and metal alloy are detached preferentially from susceptible parts on the surface, resulting in the creation of holes in passivated alloys that are exposed to an aqueous, neutral electrolyte containing corrosive species. Exp...

Superior corrosion resistance along with higher mechanical performance is becoming a primary requirement to decrease operational costs in the industries. Nickel-based phosphorus coatings have been reported to show better corrosion resistance properties but suffer from a lack of mechanical strength. Zirconium carbide nanoparticles (ZCNPs) are known...

The assessment of blood glucose levels is necessary for the diagnosis and management of diabetes. The accurate quantification of serum or plasma glucose relies on enzymatic and nonenzymatic methods utilizing electrochemical biosensors. Current research efforts are focused on enhancing the non-invasive detection of glucose in sweat with accuracy, hi...

A key challenge in producing superhydrophobic coatings (SHC) is to tailor the surface morphology on the micro-nanometer scale. In this work, a feasible and straightforward route was employed to manufacture polystyrene/nickel oxide (PSN) nanocomposite superhydrophobic coatings on aluminum alloys to mitigate their corrosion in a saline environment. D...

Proton exchange membrane fuel cells (PEMFCs) have the perception to strongly reduce global emissions through an environmentally friendly perspective. Graphene has drawn global attention and has positioned itself as a potential material for bipolar plates application. This study reviews the application of graphene and summarizes the degradation of g...

Non-degradable steel and titanium implants used to replace defects of the locomotor system or fabricate vascular stents provide maximum stability but have too many drawbacks. However; the defects in oxide layer and the corrosive nature of physiological environment, the thermodynamic tendencies make the alloys susceptible to release of cationic spec...

Ni-P/TiC nanocomposite coatings, including different concentrations of TiC nanoparticles (TCNPs) were developed on HSLA (high strength low alloy steel) substrates through the pulse electrodeposition (PED) process. The prepared coatings' structural, compositional, mechanical, wear, and electrochemical properties were accomplished, applying numerous...

Background Fatty alcohol polyoxyethylene ether-7 (AEO-7), a non-ionic surfactant, has recently been receiving extensive attention from the ocean pipeline industry for its ability to inhibit corrosion. However, the present lack of information concerning the potential environmental toxicity of AEO-7, especially towards aquatic organisms, is a major i...

Background Fatty alcohol polyoxyethylene ether-7 (AEO-7), a non-ionic surfactant, has recently been receiving extensive attention from the ocean pipeline industry for its ability to inhibit corrosion. However, the present lack of information concerning the potential environmental toxicity of AEO-7, especially towards aquatic organisms, is a major i...

The effect of the green ionic liquid compound, Quaternium-32 (Q-32), on the corrosion inhibition performance of reinforcement steel, in a simulated concrete pore solution, was investigated at different temperatures and pH values, using electrochemical impedance spectroscopy (EIS). The inhibition efficiency was improved as the concentration of Q-32...

Surfactants are widely used in the industry of detergents, household products, and cosmetics. SAPDMA is a cationic surfactant that is used mostly in cosmetics, conditioning agents and has recently gained attention as a corrosion inhibitor in the sea pipelines industry. In this regard, literature concerning the ecotoxicological classification of SAP...

Ni–B nanocomposite coatings containing various concentration aluminum nitride (AlN) nanoparticles (NPs) were developed through a scalable and conventional electrodeposition process. The influence of addition of AlN nanoparticles (0.6 and 1.2 g L⁻¹) on the morphological, mechanical and corrosion protection efficiency of Ni–B nanocomposite coatings w...

The present work studied the effect of temperature on the corrosion behavior of API X120 steel in a saline solution saturated with CO2 in absence and presence of polyethyleneimine (PEI) as an environmentally safe green inhibitor. The effect of PEI on the corrosion behavior of API X120 steel was investigated using destructive and non-destructive ele...

Aggressive operational conditions e.g. saline media and acidic gases, e.g., CO2 can increase the corrosion rate of reinforcing steel. Accordingly, the necessity to protect the steel under the above conditions without affecting the mechanical properties of the concrete is growing. Herein, the inhibition efficiency of a new corrosion inhibitor, behen...

A robust superhydrophobic nanocomposite coating (PVDFHFP-CNTs) of poly(vinylidene fluoride)‐co‐hexafluoropropylene (PVDFHFP) and carbon nanotubes (CNTs) was fabricated on carbon steel using a two-step process: electrospinning and spray coating. The wettability properties of the prepared coating were inspected by measuring the water contact angle (W...

The present work focuses on the self-healing and corrosion behavior of novel epoxy based coatings containing epoxy monomer (EM) and dodecylamine (DDA) as self-healing and corrosion inhibitor, respectively. The coating self-healing ability and the corrosion inhibition effect have been combined, together, in one single coated layer providing autonomo...

Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry op...

The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition effic...

Epoxy polymer nanocomposites filled with magnetite (Fe3O4) clay (B), named (B-DPA-PANI@Fe3O4) have been prepared at different filler loading (0.1, 0.5, 1, 3, 5 wt. %). The surface modification of clay by polyaniline (PANI) is achieved in the presence of 4-diphenylamine diazonium salt (DPA). The effects of the nanofiller loading on Tensile, mechanic...

This work supplies the missing piece of the puzzle regarding the unclear relation between the water contact angle (WCA) of a superhydrophobic coating (SHC) and its corrosion protection performance. Generally, an increase in the WCA of a coating increases its corrosion protection behavior. However, in some cases it has been reported that an increase...

Corrosion is a major cause of materials and equipment failure in the oil and gas industry, and its prevention is crucial to ensure reliability of the assets. Towards, this goal, Ni–B/AlN nanocomposite coatings were synthesized through electrodeposition technique and their properties were investigated. It is noticed that the incorporation of AlN nan...

Binary (Ni–B, Ni–P) and duplex coatings (Ni–B/Ni–P, Ni–B/Ni–P–CeO2) with an inner Ni–B layer were electrodeposited on mild steel substrates. A comparison of the structural, surface, mechanical, and electrochemical properties of the coatings is presented to demonstrate the mechanical behaviour and corrosion protection performance. Scanning electron...

The effect of electrospinning operational parameters on the morphology, surface roughness, and wettability of different compositions of electrospun polystyrene (PS)–aluminum oxide (Al2O3) nanocomposite coatings was investigated using different techniques. For example, a scanning electron microscope (SEM) coupled with an energy dispersive X-ray (EDX...

Degradation of materails due to corrosion has now emerged as an international challenge which is compelling the community to trace out some smart solutions on priority basis. Corrosion mitigation is not only important as it results in wastage of our natural resources, time, money and efforts, but more importantly its inadequate handling may lead to...

Ni-B/Ni-P-CeO 2 duplex coatings containing inner Ni-B layer were synthesized through the electrodeposition process. A mild steel sheet was used as substrate material to deposit the coatings. The structural, surface and electrochemical properties of the duplex coatings in their as synthesized condition were compared with Ni-P, Ni-B and binary Ni-B/N...

The inhibition efficiency of the stearamidopropyl dimethylamine (SAPDA) surfactant for the corrosion of API X120 steel in a 0.5 M HCl solution at different temperatures was investigated using different electrochemical and microscopy techniques. The kinetics and thermodynamic parameters were discussed. The overall results showed that SAPDA significa...

Extreme water-repellent (superhydrophobic) coatings with water contact angle higher than 150° have caught the attention of corrosion researchers in the last decade as they can be used to protect metals and alloys against corrosion. The latter is a serious problem, as it can threaten human lives in addition to its deleterious effects on the economy...

Initiation and inhibition of pitting corrosion on reinforcing steel in saturated, naturally aerated Ca(OH)2 solutions, under natural corrosion conditions, are followed through measurements of corrosion current, electrochemical impedance spectroscopy and SEM investigation. Induction period for pit initiation and limiting corrosion current for pit pr...

The interest in superhydrophobic surfaces, which demonstrate high water-repellency, have recently increased dramatically because of their wide range of applications in many fields. The two major needed conditions to get a nanostructured superhydrophobic surfaces are the optimum surface roughness and low surface energy. In our present work, the fabr...

The need to create new enhanced corrosion resistant coatings has grown because of the financial burden corrosion places on certain industries such as oil industry. Organic inhibitors have been extensively reported to protect metals and metallic alloys from corrosion although they have a negative impact on environment. Development of better corrosio...

A one-step electrospinning technique was used to prepare a protective superhydrophobic PVDF-ZnO nanocomposite coating for aluminum against corrosion. The wettability and morphology of the prepared coating surfaces was characterized using water contact angle and contact angle hysteresis measurements, scanning electron microscopy, fourier transform i...

In spite of the excellent resistance of stainless steel (SS) towards uniform corrosion, overcoming various localized corrosion could be a real challenge. This work presents an analysis of the failure behavior of 316L SS air chiller tube with a peripheral crack used in a Qatari gas company in Qatar. Macroscopic failure characteristics were analyzed...

Corrosion is of considerable concern whenever metals and alloys are used in constructions, petroleum and gas pipelines. The present article was undertaken to investigate the hydrophobicity and corrosion resistance of PVDF polymer with and without ZnO nanoparticles using the electrospinning process. Contact angle measurements, scanning electron micr...

A comparison of properties of electrodeposited NiB and NiB -ZrO 2-Al 2 O 3 nanocomposite coatings is presented to explain the benefits of addition of mixed nanoparticles of ZrO 2 and Al 2 O 3 into NiB matrix. A comparative study of the properties of NiB and NiB -ZrO 2-Al 2 O 3 nanocomposite coatings in their as deposited condition indicates that th...

Benzotriazole and some of its derivatives cause inhibition of corrosion of reinforcing steel in saturated naturally aerated Ca(OH)2 solutions contaminated by Cl−. The inhibition efficiency of these compounds depends on both the inhibitor type and concentration, as well as, on the chloride ions content. Inhibition by these compounds is assumed to ta...

Mitigation of metals and alloys’ corrosion is of a great importance because of the negative effect that corrosion causes for the environment and economy. In this study, a superhydrophobic polyvinylidene fluoride (PVDF) coating with oxide nanoparticles (< 100 nm) was synthesized using the electrospinning technique on pretreated Al and C-steel surfac...