Hussain Alawadhi

Hussain Alawadhi
University of Sharjah | US · Center for Advanced Materials Research

Associate Professor

About

142
Publications
21,815
Reads
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2,386
Citations
Citations since 2016
82 Research Items
1861 Citations
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500
20162017201820192020202120220100200300400500
Introduction
Hussain Alawadhi currently the director of the Center for Advanced Materials Research, University of Sharjah. Hussain does research in Condensed Matter Physics and Material Science. Their current project is "Chemical Composition of Aerosols in UAE".
Additional affiliations
October 2012 - December 2015
University of Sharjah
Position
  • Managing Director

Publications

Publications (142)
Article
Electrochemical reduction of CO2 with high selectivity for alcohol production has been considered as a proper way to address both energy catastrophe and environmental complications around the globe. Herein, two metal oxides, namely CuO and ZnO having great potential to catalyze the CO2 reduction, are chosen to form a composite with MoS2, where MoS2...
Article
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Eriochrome Black T (EBT) and chromium (Cr) are considered to be potential pollutants due to their toxicity and severe impact on the environment. In the current study, hydrotalcite-derived Mg-Ca-Al-LDO mixed metal oxide composite was prepared using a conventional co-precipitation method and explored in terms of the removal of Cr and EBT dye from aqu...
Article
Hexavalent chromium (Cr⁶⁺) is a carcinogenic pollutant found in different wastewater streams. The current study investigates the potential removal of Cr⁶⁺ from aqueous solutions by nitrogen-doped coconut granulated activated carbon (N-GAC). The raw GAC was chemically and thermally treated with urea (1:1 ratio) in an ethanol medium and calcined unde...
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In this study, a low-cost granular activated carbon doped with Fe2O3 nanoparticles (Fe-GAC) was prepared via a modified sol-gel technique and utilized for the elimination of lead (Pb(II)) and chromium (Cr(T)) ions from synthetic and actual brackish water. The effect of adsorption parameters on the removal of Pb(II) and Cr(T) ions from the water was...
Article
Dry (CO2) reforming of methane (DRM) for syngas production has gained great attraction since it utilizes two major green house gases (CH4, CO2). However, this process is still far from commercialization due to the catalyst deactivation by coking and metal sintering. In this present work, we have prepared a series of Zr promoted Ni/MgO catalysts usi...
Article
In the current work, granular activated carbon (GAC) materials doped with 5 and 10 wt.% of Fe were prepared via incipient wetness impregnation method utilizing two different solvents (water and ethanol) and calcined in N2 and static air atmosphere. The prepared materials were thoroughly characterized by FE-SEM, EDS, XRD, FT-IR, XPS and BET surface...
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To meet the escalated global energy requirements while preserving the intrinsic environmental integrity, it is highly important to develop renewable and clean energy sources as the replacement of traditional fossil fuels. Hydrogen is an appealing green energy source due to huge energy density, carbon free by products, renewable and storable nature....
Article
Electrocatalytic hydrogen evolution reactions (HER) offer an enduring strategy for hydrogen fuel production and are vital for sustainable energy conversion and storage. To explore efficient and durable HER electrocatalysts, we fabricated gold-aryl nanoparticles (AuNPs-COOH) anchored on graphitic carbon nitride (g-C3N4) sheets by reducing aryldiazon...
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Metal-organic frameworks (MOFs) are a versatile category of porous coordination polymers which can be differentiated from other porous nanomaterials due to their fascinating properties such as adaptable surface chemistry, tuneable functionalities, exceedingly large surface area and uniform/controllable pore size. This newly emerging family of mater...
Article
Nafion membrane is a commercial type of electrolyte membrane that is widely used in low-temperature fuel cells. Nafion membrane is expensive and allows fuel to crossover from anode to cathode. Therefore, it decreases fuel utilization and results in mixed potential at the cathode. Modifying the Nafion membrane and/or replacing it with non-Nafion-bas...
Article
Designing a vastly effective and stable electrocatalyst for accelerating CO2 reduction is presented and discussed. Herein, we report a Cu-based composite material comprising of g-C3N4, MoS2, and copper nanoparticles (Cu NPs) for more efficient electrochemical CO2 reduction. The g-C3N4/MoS2 is used as a support for Cu NPs as part of the novel compos...
Article
Exploration of novel strategies for fabricating SERS substrates attracted enormous research potential as achieving high sensitivity, reproducibility along with cost effectiveness is really challenging. Herein, we have fabricated hierarchical silver nanoprism/graphene oxide/silicon nanowire (Ag/GO/SiNWs) arrays as surface-enhanced Raman scattering (...
Article
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Electrochemical CO2 reduction has drawn substantial attention not only due to the demand for energy but also the need for a sustainable environment. In this work, a non-noble based electrocatalyst (Cu2O-MoS2) was developed using a facile method for its application in CO2 reduction. The synthesized composite material was characterized using XPS, XRD...
Article
This study reports the remineralizing potential and biocompability of titanium dioxide doped phosphate glass (TDPG). Glass paste was prepared with polyacrylic acid and applied as a thin coat on etched dentin for different periods Normal and etched dentin were used as controls. Remineralization potential was tested using Atomic force microscopy, sca...
Article
Metal chalcogenides have received significant attention as electro-catalysts in different applications, due to their superior electrical conductivity and good thermal and mechanical stabilities. In this work, the optimum monocrystalline Ni-P and Ni-C, C (Se, S, O) nanosheet (NS), prepared on nickel foam as standalone anodes for urea fuel cells was...
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Severe acute respiratory syndrome SARS-CoV-2 virus led to notable challenges amongst researchers in view of development of new and fast detecting techniques. In this regard, surface-enhanced Raman spectroscopy (SERS) technique, providing a fingerprint characteristic for each material, would be an interesting approach. The current study encompasses...
Article
Transition metal selenides (TMS) have excellent research prospects and significant attention in supercapacitors (SCs) owing to their high electrical conductivity, superior electrochemical activity and excellent structural stability. However, the commercial utilization of TMS remains challenge due to their elaborate synthesis. Present study designed...
Article
A novel g-C3N4/VC composite was prepared by adopting simple hydrothermal treatment without using any additives from bulk g-C3N4 and Vulcan XC-72R (VC) in different ratios. Further, the resulting composite materials were used as a support for the synthesis of Cu2O NPs. The use of g-C3N4/VC not only acts as a support for the Cu2O NPs but also it form...
Article
Full-text available
We have conducted a comprehensive sampling campaign of PM 10 pollutants at a site next to a major highway, using standard protocols. Particulate matter (PM) total mass, elemental and chemical/mineral compositions of the fine and coarse fractions of traffic-related PM pollutants were determined using several complementary techniques, including gravi...
Article
Capacitive deionization (CDI) shows promising potential for water desalination due to its high performance, energy efficiency, and environmental friendliness. Because of their excellent conductivity, chemical stability, and high surface area, carbon derivatives are the most used capacitive deionization electrode materials. Among these carbon materi...
Article
Mesoporous Co dendrites prepared by electroplating have a surface area of 145 m²g⁻¹, which is three times that of Co nanoparticles. The Co dendrites demonstrate superior urea oxidation activity compared to Ni or Co nanoparticles prepared using chemical reduction. The onset potential with Co dendrites is around 0 V “vs. Ag/AgCl” using 2 M urea, that...
Article
Capacitive deionization (CDI) is one of the emerging desalination technologies that attracted much attention in the last years as a low-cost, energy-efficient, and environmentally-friendly alternative to other desalination technologies, such as multi-stage flash desalination (MSF) and multiple effect distillation (MED). The implementation of farada...
Preprint
Full-text available
In this study, we evaluated the sensing performance of silver nanoprism/graphene oxide/silicon nanowires (AgNPr/GO/SiNWs) nanohybrid system for effective detection of organic dye and herbicide residues in freshwater via surface-enhanced Raman scattering (SERS). Homogenous and vertically aligned SiNWs have been successfully synthesized using metal-a...
Article
A biocompatible graphitic carbon nitride (g-C3N4) was prepared on the surface of carbon brush fiber (CB) via a facile one-step preparation method. The prepared g-C3N4 formed a composite with the carbon brush’s fibers (g-C3N4@CB), as shown from the XRD analysis. The g-C3N4@CB was used as an anode in a yeast-based microbial fuel cell (MFC), and demon...
Article
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We report a density functional theory study of ZnO cluster doped with Eu and Mg along with native point defects using the generalized gradient approximation including the Hubbard parameter. The Zn atomic positions are found to be energetically more favorable doping sites than O. The Eu has a lower formation energy than Zn and O vacancies, helps in...
Article
Remote areas and poor communities are occasionally deprived of access to freshwater. It is, therefore, critical to providing a cheap and efficient desalination system that encourages the development of those communities and benefiting society at large. Solar stills are an affordable, direct method of water desalination, but its productivity is the...
Chapter
Electrochemical reduction is the most promising way to convert CO2 into valuable fuels using efficient catalysts. This process has many advantages such as high energy density of the produced fuel, operator simplicity, room temperature operation, and ease of the process control. This work adresses various aspects of the electrocatalyst, essential el...
Chapter
Metal-organic frameworks (MOFs) exhibit extraordinary properties such as high surface area with a controllable structure and morphology. MOFs are emerging electrocatalysts promoting electroreduction of CO2 to value-added products. Among various metals used in the MOFs reported so far, copper is a unique metal that catalytically reduces CO2 into val...
Chapter
The increasing levels of CO2 in the atmosphere has become a source of concern, since it is expected to exceed the safe limit this century. The need for energy and its consumption in modern societies is increasing every day. Therefore, it is of utmost importance to mitigate the environmental consequences of increasing CO2 emission. Electrochemical r...
Article
The harmful effect of carbon pollution leads to depletion of the ozone layer, which is one of the main challenges confronting the world. Although progress is made in developing different carbon dioxide (CO2) capturing methods, these methods are still expensive and face several technical challenges. Fuel cells (FCs) are efficient energy converting d...
Article
Full-text available
Generating true random bits of high quality at high data rates is usually viewed as a challenging task. To do so, physical sources of entropy with wide bandwidth are required which are able to provide truly random bits and not pseudorandom bits, as it is the case with deterministic algorithms and chaotic systems. In this work we demonstrate a relia...
Article
A g-C3N4/VC composite material comprising of graphitic carbon nitride (g-C3N4) and Vulcan carbon (VC) with different ratios, i.e., 2:1, 1:1, and 1:2 were prepared through hydrothermal method without using any additives. These composite materials were further utilized as a support for Ni(OH)2 nanoparticles. These materials formed new type of Ni/(g-C...
Article
Microbial fuel cell (MFC) is a promising technology for simultaneous wastewater treatment and energy harvesting. The properties of the anode material play a critical role in the performance of the MFC. In this study, graphene oxide was prepared by a modified hummer's method. A thin layer of graphene oxide was incorporated on the carbon brush using...
Article
We have conducted a comprehensive, year-long, sampling campaign for particulate matter (PM) at a site near a major highway, following standard protocols. Total mass, elemental and chemical composition of the fine fractions (PM 2.5) of particulates originating from traffic are determined using several complementary techniques. These complementary te...
Article
In this work, standalone cobalt dendrites are prepared then doped with graphene flakes by a simple electroplating technique. Microstructural examination using SEM with EDX, as well as Raman spectroscopy measurements, verified the successful formation of graphene. The prepared material exhibit a favorably high electrochemical methanol oxidation acti...
Article
Full-text available
Microbial fuel cell (MFC) is an emerging method for extracting energy from wastewater. The power generated from such systems is low due to the sluggish electron transfer from the inside of the biocatalyst to the anode surface. One strategy for enhancing the electron transfer rate is anode modification. In this study, iron nanostructure was synthesi...
Article
This study presents the simultaneous generation of two uncorrelated and continuous high‐quality random bitstreams originating from a single physical system based on confined, nonthermal electrochemical microplasma operating under atmospheric conditions. The randomness is intrinsically inherited from the time‐resolved electrical current and optical...
Article
SEM/EDS as Complementary Techniques to XRD and XRF for Structural Determination of Particulate Matter Pollution - Nasser Hamdan, Hussain Alawadhi, Mohamed Shameer
Article
Full-text available
In this work, Cu2O nanoparticles were successfully prepared onto the surface of two-dimensional graphitic carbon nitride (g-C3N4) by using a simple solution chemistry approach. An environment-friendly reducing agent, glucose, was used for the synthesis of Cu2O NPs onto the surface of g-C3N4 without using any surfactant or additives. The surface com...
Article
A simple electrodeposition technique has been used to synthesize Co nanoparticles with a 3D leaf-like morphology at room temperature. The prepared Co material has a layered sheet structure of a few nanometers thickness. The surface area of the Co leaf-like structure is three times higher than that of the Co nanoparticles. The prepared nanoparticles...
Article
Full-text available
Aluminum nitride nanoparticles (AlN-NPs) were fabricated by a RF magnetron sputtering and inert gas condensation technique. By keeping the source parameters and sputtering time of 4 h fixed, it was possible to produce AlN-NPs with a size in the range of 2-3 nm. Atomic force microscopy (AFM), Raman spectroscopy, X-ray diffraction (XRD), and UV-visib...
Article
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Particulate matter (PM) specimens from a traffic site were sampled on Teflon filters using a low volume sampler. The sampling campaign ran over a one-year period with sampling frequency of twice a week for both PM 2.5 and PM 10. X-ray diffraction (XRD) methods, which are not commonly used in PM analysis, have been utilized successfully to identify...
Article
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Over recent years, metal nanoparticles have largely been investigated due to their potential activities. This study focused on synthesizing silver nanoparticles (AgNPs) using the desert plant Cyperus conglomeratus, which is the most abundant species on the sand dunes in the UAE, and their anticancer activity. The synthesized AgNPs were characterize...
Article
Full-text available
Surface enhanced Raman scattering (SERS) is an important analytical tool for the optochemical detection of molecules. The enhancement is commonly achieved by engineering (i) novel types and morphologies of plasmonic nanomaterials, and (ii) patterned or roughened supporting substrates of high surface area for increased light scattering and molecule...
Article
Full-text available
Particulate matter (PM) specimens from a traffic site were sampled on Teflon filters using a low volume sampler. The sampling campaign ran over a one-year period with sampling frequency of twice a week for both PM2.5 and PM10. X-ray diffraction (XRD) methods, which are not commonly used in PM analysis, have been utilized successfully to identify cr...
Article
Full-text available
The magnetic properties of a single crystalline bi-layered La1.15Sr1.85Mn2O7 manganite have been studied using magnetization measurements complemented by low-temperature Raman spectroscopy. The bulk magnetization measurements revealed a magnetic transition at a temperature of Tc = 85 K. The temperature dependence of the inverse magnetization data r...
Article
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Nanoparticle (NP) synthesis by biological systems is more cost-effective, safe, and environmentally friendly when compared to currently used chemical and physical methods. Although many studies have utilized different plant extracts to synthesize NPs, few studies have incorporated living plants. In this study, silver nanoparticles (AgNPs) were synt...
Article
The quest for high performance supercapacitors from the energy-power point of view is commonly addressed from the constituting electrode materials and/or the electrolyte. Carbon-based double-layer capacitors are known for their high power density, whereas pseudocapacitors which use transition metal oxides/nitrides/sulfides or conductive polymers ar...
Article
Direct urea fuel cell (DUFC) is an attractive and inexpensive method for the simultaneous wastewater treatment (urine and urea-contaminated water) and electricity generation. Many efforts have been made to increase the catalytic activity of Ni-based DUFC anodic catalyst toward urea oxidation, which is considered to be the best non-precious catalyst...
Article
Due to the rapid increase in their efficiencies, third generation photovoltaics rose to prominence in recent years, and became serious competitors to conventional silicon based and thin film solar cells. This work investigates various techniques to grow and/or deposit copper oxide (CuO) on a copper substrate for utilization as a counter electrode i...
Article
Full-text available
To develop operative surface-enhanced Raman spectroscopy (SERS) sensors, nanostructures with high signal enhancement and ease of production are highly desired. SERS-active nanoparticle-gap-film (NGF) sandwich substrate using graphene as the gap nanospacer is of particular interest due to its strong local field enhancement associated with the atomic...
Article
This work presents the simple synthesis and simultaneous deposition of graphene nanoplatelets onto pure copper substrates for use as capacitive deionization electrodes. Copper is cheap and abundant material that can easily be fabricated into electrodes but suffers from high reactivity in solution with unpredictable consequences. The deposition of t...
Article
We report the synthesis of aryldiazonium tetrachloroaurate(III) salts [X-4-C6H4N≡N]AuCl4 (X = F, Cl, Br, I, CN, NO2) and their mild reduction to covalently functionalized nanoparticles. The synthesis of the salts was carried out by the oxidation of anilines, dissolved in HCl, using sodium nitrite followed by the exchange of the counter anion with [...
Article
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This paper presents the results obtained for incorporating the Al 65 Cu 24 Fe 11 material with the conventional TiO2 as the electron injection layer in dye-sensitized solar cells. The icosahedral phase of the Al-Cu-Fe system has attractive physical and optical properties at the target composition, and is obtained by synthesizing the material via th...
Article
Full-text available
With the increased use of metal nanoparticles (NPs), their access to the food chain has become a main concern to scientists and holds controversial social implications. This research particularly sheds light on copper nanoparticles (CuNP), as they have been commonly used in several industries nowadays. In this study, we investigated the phytotoxici...
Article
This study unravels the soft chemical synthesis of Bi2O3/ZnO (BZO) nanocomposites having nano-cones like morphology with tunable optical and luminescent properties. The prepared BZO samples with varying Bi2O3 concentrations have been characterized for structural, morphological, band gap energy, photoluminescence (PL) and antibacterial characteristi...
Article
Random bit generators (RBGs) in today's digital information and communication systems employ a high rate physical entropy sources such as electronic, photonic, or thermal time series signals. However, the proper functioning of such physical systems is bound by specific constrains that make them in some cases weak and susceptible to external attacks...
Article
Carbon-based nanofluids are viewed as promising thermal fluids for heat transfer applications. However, other properties, such as electrical conductivity and electrochemical behavior, are usually overlooked and rarely investigated despite their importance for the overall performance characterization of a given application. In this study, we synthes...
Article
Full-text available
The accumulation of dust pollution on the photovoltaic (PV) module can have a significant effect on the productivity and efficiency of PV systems in different locations in the world. Dust which accumulated over time on the PV module and is based on weather conditions led to the reduction in the effectiveness of solar cells. The aim of this research...
Article
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Exosomes released from cancer cells support metastasis and growth of recipient cells and increase their resistance to chemotherapy. Therapeutic targeting of exosomes is a promising area in cancer research. Our aim is to test the effect of the mast cell stabilizer ketotifen on exosomes release from cancer cells and how this can modify their response...
Article
One of the main challenges facing the development of urea fuel cells is the low catalytic activity of the anode. Ni decorated carbon nano-fiber is a promising anode catalyst in urea fuel cells. In this study, we have investigated the effect of Cd doping of Ni decorated carbon nano-fiber on catalytic activity for urea oxidation. The catalyst was pre...
Article
We used a multistage PIXE inertial impactor with nine different aerodynamic diameter ranges (between 16 and 0.06 μm) to sample indoor particulate matter (PM). X-ray fluorescence (XRF) measurements performed at cutoff diameters (CoDs) of 0.25, 0.5, 1, 2, 4, and 8 μm were used to identify elements in various size fractions. Anthropogenic sources were...
Article
In the present work, we fabricate and characterize carbon graphite films by high-voltage cathodic and anodic contact glow discharge electrolysis (CGDE) for supercapacitor applications. Transmission electron microscopy revealed that the carbon films obtained by anodic CGDE, in which a carbon graphite is used as the positive electrode, are in the for...
Article
This work presents a systematic study by Raman spectroscopy of the vibrational properties of La0.7Ca0.3MnO3 (LCMO70/30) thin films epitaxially grown on LaAlO3 single crystalline substrates. The epitaxial LCMO70/30 thin films were prepared using a metal organic deposition process with thermal annealing at 800 °C, 900 °C and 1000 °C, with thicknesses...
Article
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Graphene nanosheets (GNS) reinforced Al2O3 nanocomposites were prepared by a rapid sintering route. The microhardness and fracture toughness values of the resulting nanocomposites simultaneously increased due to efficient graphene nanosheet incorporation and chemical interaction with the Al2O3 matrix grains. The properties enhancement is attributed...
Article
Full-text available
This paper presents the results obtained for dye-sensitized solar cells with an Al65Cu24Fe11 mesoporous layer replacing the conventional TiO2 layer. The synthesis of the icosahedral quasicrystalline Al-Cu-Fe compound is done by high energy ball milling to ensure the highest possible diffusion of the starting powder elemental materials, and the evol...
Article
Developed fingerprints imaging was achieved by dusting using doped polyaniline (PANI) nanocomposites. Substituted anilines of 2,6-dimethyl, 2,6-diisopropyl, 3-nitro, and 2-carboxyl were used in the synthesis of the nanocomposites by oxidative polymerization using gold acid and ammonium persulfate (APS). The nanocomposites were characterized using F...
Article
Bipolar electrochemistry is used as an economical, single-step, and scalable process for the oxidation of a wireless graphite, and the subsequent electrophoretic deposition of graphene oxide thin film on a second wireless substrate. All-solid-state symmetric double-layer ca-pacitor (EDLC) using binderless reduced graphene oxide electrodes exhibited...
Article
Bipolar electrochemistry is used as an economical, single-step, and scalable process for the oxidation of a wireless graphite, and the subsequent electrophoretic deposition of graphene oxide thin film on a second wireless substrate. All-solid-state symmetric double-layer capacitor (EDLC) us- ing binderless reduced graphene oxide electrodes exhibite...
Article
Graphene is a 2-D carbon material showing considerable prominence in a wide range of optoelectronics, energy storage, thermal and mechanical applications. However, due to its unique features which are typically associated with difficulty in handling (ultra-thin thickness and hydrophobic surface, to name a few), synthesis and subsequent deposition p...
Article
In the present work, we fabricate and characterize carbon graphite films by high-voltage cathodic and anodic contact glow discharge electrolysis (CGDE) for supercapacitor applications. Transmission electron microscopy revealed that the carbon films obtained by anodic CGDE, in which a carbon graphite is used as the positive electrode, are in the for...
Article
Full-text available
This paper presents a study of titanium oxide TiO2 as one of the components of dust pollution affecting the PV performance. This pollutant can be found in various quantities in different locations around the world. The production of energy by different types of photovoltaic systems is very sensitive and depends on various environmental factors. Dus...