Browsing by Author "Zavahir, Sifani"
Now showing items 1-11 of 11
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Emerging clay-aryl-gold nanohybrids for efficient electrocatalytic proton reduction
Jlassi, Khouloud; Zavahir, Sifani; Kasak, Peter; Krupa, Igor; Mohamed, Ahmed A. ( Elsevier , 2018 , Article)There is an ever growing demand for renewable sources of energy to replace conventional fossil fuels. One of the alternatives is usage of hydrogen production by electrochemical hydrogen evolution reaction (HER). Toward ... -
Facile and Novel LiAlO2 Film Electrodes for Energy Efficient Li recovery from Seawater Reverse Osmosis (SWRO) Brine
Hafsa, Umme; Zavahir, Sifani; ElMakki, Tasneem; Ahmad, Zubair; Han, Dong Suk ( Qatar University Press , 2021 , Poster)Concentration of Li in seawater is too low at 0.17 ppm despite its high content altogether with a reported 230 billion tons. Hence, seawater is not a practical source to recover Li from; Li is largely extracted by solar ... -
Fluorescent Zn(II)-Based Metal-Organic Framework: Interaction with Organic Solvents and CO<inf>2</inf> and Methane Capture
Zavahir, Sifani; Yahia, Hamdi Ben; Schneider, Julian; Han, Dongsuk; Krupa, Igor; Altamash, Tausif; Atilhan, Mert; Amhamed, Abdulkarem; Kasak, Peter... more authors ... less authors ( MDPI , 2022 , Article)Adsorption of carbon dioxide (CO2), as well as many other kinds of small molecules, is of importance for industrial and sensing applications. Metal-organic framework (MOF)-based adsorbents are spotlighted for such applications. ... -
Immobilization of concanavalin A lectin on a reduced graphene oxide-thionine surface by glutaraldehyde crosslinking for the construction of an impedimetric biosensor
Filip, Jaroslav; Zavahir, Sifani; Klukova, Ludmila; Tkac, Jan; Kasak, Peter ( Elsevier B.V. , 2017 , Article)Lectins, which are proteins with selective affinity to glycans or glycoproteins, have been recognized as promising agents for the construction of devices for the detection of specific glycoproteins and for glycoprofiling. ... -
Lithium capture in seawater reverse osmosis (SWRO) brine using membrane-based capacitive deionization (MCDI) system
Azam, Reem; ElMakki, Tasneem; Zavahir, Sifani; Ahmad, Zubair; Hijós, Gago Guillermo; Han, Dong Suk... more authors ... less authors ( Qatar University Press , 2021 , Poster)Lithium-battery based industries including vehicles, electronics, fusion and thermonuclear, consume lithium rapidly, which raises the need for developing a lithium recovery system. Lithium global market consumption in 2016 ... -
Membrane Distillation Crystallization Hybrid Process for Zero Liquid Discharge in QAFCO Plant
Gulied, Mona; Zavahir, Sifani; Elmakki, Tasneem; Qiblawey, Hazim; Hameed, Bassim; Han, Dong Suk... more authors ... less authors ( Qatar University Press , 2021 , Poster)Qatar fertilizer company (QAFCO) is one of the world’s largest single site producer of ammonia and urea with production capacity of 12,900 metric tons per day. Currently, QAFCO faces major challenges in terms of water ... -
Potential application of hybrid reverse electrodialysis (RED)-forward osmosis (FO) system to fertilizer-producing industrial plant for efficient water reuse
Tasneem, Elmakki; Zavahir, Sifani; Gulied, Mona; Qiblawey, Hazim; Hammadi, Bassim; Khraisheh, Majeda; Shon, Ho Kyong; Park, Hyunwoong; Han, Dong Suk... more authors ... less authors ( Elsevier , 2023 , Article)This study presents an experimental investigation and a parametric analysis of the applicability of agricultural fertigation and power generation using a reverse electrodialysis-forward osmosis (RED-FO) hybrid system, with ... -
Simultaneous CO2 treatment and blue energy generation from wasted industrial streams
Elmakki, Tasneem; Zavahir, Sifani; Gulied, Mona; Azam, Reem; Peter Kasak, Peter; Popelka, Anton; Han, Dong Suk... more authors ... less authors ( Qatar University Press , 2021 , Poster)In the last decade, there has been an increased global need for finding bright solutions to tackle industrial wastes and emissions release. Herein, this work explores the utilization of a compact Reverse Electrodialysis ... -
Tailoring electrocatalytic properties of Pt nanoparticles grown on Ti3C2Tx MXene surface
Filip, Jaroslav; Zavahir, Sifani; Lorencova, Lenka; Bertok, Tomas; Yousaf, Ammar Bin; Mahmoud, Khaled A.; Tkac, Jan; Kasak, Peter... more authors ... less authors ( Electrochemical Society, Inc. , 2019 , Article)In this work, the spontaneous and NaBH4-induced reduction of chloroplatinic acid on the surface of Ti3C2TX MXene was investigated to synthesize a hybrid PtNP-decorated MXene nanomaterial (MX-Pt) with potential as hydrogen ... -
Tandem osmotic engine based on hydrogel particles with antipolyelectrolyte and polyelectrolyte effect fuelled by both salinity gradient modes
Padmanabhan, Anjali Cheeramthodi; Han, Dong Suk; Zavahir, Sifani; Tkac, Jan; Kasak, Peter ( MDPI , 2021 , Article)In this study, we propose a new approach to attain energy by salinity gradient engines with pistons based on hydrogels possessing polyelectrolyte and antipolyelectrolyte effects in a tandem arrangement, providing energy ... -
Versatile Bifunctional and Supported IrNi Oxide Catalyst for Photoelectrochemical Water Splitting
Zavahir, Sifani; Hafsa, Umme; Park, Hyunwoong; Han, Dong Suk ( MDPI , 2022 , Article)Designing a high-performance electrocatalyst that operates with photon-level energy is of the utmost importance in order to address the world’s urgent energy concerns. Herein, we report IrNi nanoparticles uniformly distributed ...