Gülfeza Kardaş

Gülfeza Kardaş
Cukurova University | CU · Department of Chemistry

PhD

About

127
Publications
23,910
Reads
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6,253
Citations
Citations since 2017
54 Research Items
3554 Citations
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
Additional affiliations
November 1993 - present
Cukurova University
Position
  • Professor

Publications

Publications (127)
Article
Full-text available
In this paper, the surface of mild steel is modified with 4-carboxyphenyl diazonium and subsequently, the corrosion behaviour of the modified surface is scrutinized in hydrochloric and sulfuric acid solutions. The diazonium salt was synthesized in situ either in 0.5 M HCl or 0.25 M H2SO4 through the reaction between 4-aminobenzoic acid and sodium n...
Article
In this study, Pt‐decorated poly(3,4‐ethylenedioxythiophene) (PEDOT) electrocatalyst was uniformly coated electrochemically reduced graphene oxide (ERGO) layer on glassy carbon electrode (GCE) has been created using appropriate procedures to facilitate the implementation of the methanol oxidation reaction (MOR). This multi‐layer catalyst was charac...
Poster
Metan Pirolizinde Eriyik Metal Katalizörleri’nin İlk Prensipler ile Teorik Olarak Modellenmesi ve Katalitik Aktivitelerinin Karşılaştırması Arda Erbasan1, Uğur Sökmen 2; Esra Eroğlu 3; Rasiha Nefise Mutlu 4; Gökhan Çelik 2; Hande Toffoli 1; İskender Gökalp 4; Gülfeza Kardaş 5 1 Orta Doğu Teknik Üniversitesi, Fizik Bölümü 2 Orta Doğu Teknik Ünivers...
Presentation
Hydrogen is a vital source of energy and indispensable for the chemical industry. Today, hydrogen is globally supplied by steam reforming of natural gas: a process emitting greenhouse gases, including enormous amounts of CO2. Therefore, the need for environmentally friendly hydrogen production technologies is clear. Catalytic pyrolysis of methane i...
Article
In this research work, α-Fe2O3/Bi2S3 heterojunction photoelectrodes for improved photoelectrochemical water splitting have been successfully fabricated on FTO substrate by applying hydrothermal and solvothermal approaches. A seed layer approach is also applied before the solvothermal step for the homogeneous distribution of Bi2S3 over α-Fe2O3 nanor...
Article
The development of high-performance and robust photoelectrode with architecture design is a popular research area. In this study, BiVO4 photo corrosion protection carries out with α- Cr2O3 core-shell under solar light irradiation for photoelectrochemical hydrogen production. BiVO4 nanoparticles are coated with α-Cr2O3 core-shell by various hydrothe...
Poster
Li-ion batteries and, starting nearly two decades ago, is considered the powerhouse of the personal digital electronics revolution with its introduction. One of the expensive components of lithium-ion batteries is membrane seperators. Today, microporous membranes made of both Polyethylene (PE) and Polypropylene (PP) in the form of three layers of P...
Article
Herein we investigated the photoelectrochemical performance of manganese (Mn) doped cadmium sulfide (CdS) quantum dots (QDs) decorated onto the surface of hierarchical double-layered rosette-rod titanium dioxide (TiO2) photoanode. The rosette-rod TiO2 architectures are synthesized by two steps hydrothermal process while Mn-doped CdS QDs deposition...
Article
Hydrogen, called the energy source of the future, is a superb energy carrier. Electrolysis of water is the only method in the production of hydrogen classified with the green category. However, although the cost of hydrogen production by electrolysis has decreased considerably in recent years, it still has not reached reasonable levels. It is neces...
Article
hotoelectrochemical hydrogen production, using photoelectrodes with sophisticated hierarchical architecture designs combined with effective photoactive materials are found to be an impressive route for achieving high photoelectrocatalytic efficiency. Here we investigated the photoelectrocatalytic hydrogen production of CdS Quantum dots (QDs) sensit...
Conference Paper
Bilgisayarların Aşırı Isınmasını Önlemek için 3D Yazıcı ile Mikrokapsüllenmiş Faz Değiştiren Malzemeli Kompozit Geliştirilmesi
Conference Paper
• Firstly, the only alternatives to fossil fuels are natural and renewable energy sources. Research on thermal energy storage (TES) systems that will allow continuous use of these sources have been the common subject of many scientists in recent studies. • Our motivation in this study, different microencapsulated phase change materials (PCMs) are n...
Article
The earth-abundant Cu (I) is one of the promising dye-synthesized photoelectrochemical cells (DS-PECs) for sustainable energy production. We report that the heteroleptic Cu (I) complex's catalysis consisting of diphenyl phosphinoaminoacetic and bipyridine derivatives have investigated with DS-PECs on water splitting application. HOMO-LUMO energy le...
Article
In this work, we have fabricated a three-dimensional double layered rosette-rod TiO2 heterojunction with Bi2S3 using two-step hydrothermal method and solvothermal route. A seed layer approach is also used to assist uniform distribution of Bi2S3 and to form a perfect heterojunction between TiO2 and Bi2S3. Morphologically studies reveal that the doub...
Article
In this article, a novel and non-toxic Schiff base containing multi-heteroatom coded with the name 5-DAT (5-(4-(diethylamino)benzylidene)amino)-1,3,4-thiadiazole-2-thiol is designed as the corrosion inhibitor for mild steel (MS) in 1.0 M HCl. The structure of Schiff base is illuminated by NMR, FT-IR, UV spectrophotometers and theoretical (Gaussian...
Article
Full-text available
In this work, Boron-doped Bx:Ni/NiOδ [x(%) = 0.0, 5.0, 10.0 and 15.0] core/shell magnetic nanoparticles were synthesized by the polyol reduction process. The XRD spectra of the samples indicate that the B addition does not cause any change in the cubic structure of Ni. The TEM photographs present that nanoparticle formation and accumulation orienta...
Article
Full-text available
Electroplated Ni–Co alloys show superior electrocatalytic activity towards hydrogen evolution reaction. In this work, the cysteine and sodium gluconate obtained from natural products were utilized to electroplate the nanocrystalline Ni–Co alloys. The electroplating baths were characterized using cathodic polarization technique. The effect of sodium...
Article
Full-text available
Adsorption ability, stability and corrosion inhibition of phoenix dactylifera (date palm) seed extract (PDSE) as a natural corrosion inhibitor were studied on mild steel (MS) in 1 M HCl solution after different exposure times. Linear polarization resistance (LPR), potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS) te...
Article
Full-text available
zet: Bu çalışmada, Poly-N-aminorodanin (pNAR) platin elektrot yüzeyine dönüşümlü voltametri tekniği kullanılarak sentezlenmiştir. pNAR'nin pembe renkli ve homojen yapıda olduğu tespit edilmiştir. pNAR'ın kimyasal yapısı ve oluşum mekanizması 13C-NMR, FT-Infrared spektrumları ve enerji dağılımlı X-ışını spektroskopisi (EDX) ile belirlenmiştir. pNAR'...
Article
In this study highly oriented, rutile phase one dimensional Titania nanorod array (TiO2 NRA) modified by gadolinium doping were synthesized on the conductive glass substrate (FTO) by the hydrothermal method. The effect of Gd doping on the photoelectrochemical performance of TiO2 NRA was investigated. Crystal phase, structural, morphological and com...
Article
A newly Schiff base, 4-amino-N-benzylidene-benzamide (4-BAB) protection ability was synthesised from a condensation reaction of 4-aminobenzamide (4-AB) and benzaldehyde (BA). Adsorption and corrosion inhibition effect of this compound on mild steel (MS) in 1.0 M HCl solution were studied. The data obtained from measurments of this compound were com...
Article
Using of phase change materials (PCM) for increasing energy savings in sustainable buildings is receiving a lot of interest in commercial applications. Butyl stearate (BS), as PCM, can be used to maintain ambient temperature in the human comfort zone and prevent temperature fluctuations by enhancing the thermal properties of concrete. The long‐term...
Article
The renewable hydrogen production has been immense research area, converting solar light to hydrogen in PEC applications. Both ZnO and Cu2O are lower cost material for commercialization on PEC. Herein, Cu2O electrochemical deposition time effect was investigated on ZnO nanorod arrays (NRAs) for water splitting with solar light irradiation (10, 20,...
Article
The microstructure of copper oxide layer on zinc oxide is optimized via a two-step electrodeposition method to create potential composite electrodes for photoelectrochemical cells. By optimizing the deposition temperature, the microstructure and photocatalytic properties can be fundamentally modified. The strategy includes the potentiostatic deposi...
Article
The adsorption and inhibitor effect of Expired Amoxicillin (E.A) on mild steel in 1NHCl was studied by weight loss, potentiodynamic polarization, Electrochemical Impedance Spectroscopy (EIS), zerocharge potential method (PZC) and characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The inhibition efficacy obtained...
Article
In this study, known electrocatalytic active metal nickel and low amount of gallium were electrodeposited on carbon felt electrode for hydrogen evolution reaction in alkali medium. Morphological and structural analyses of prepared electrodes were determined by scanning electron microscopy and energy dispersive X-ray spectroscopy. The electrocatalyt...
Article
Abstract The inhibitor effect of Agave Americana Extract (AAE), on mild steel corrosion in 0.5MH2SO4, was investigated by potentiodynamic polarization technique and Electrochemical Impedance Spectroscopy (EIS). The inhibitor concentration effect on the corrosion process was studied. AAE acts as a mixed type inhibitor, and the inhibition efficiency...
Article
This study presents the synthesis, structural characterization, and inhibition efficiency of a new sulphur containing Schiff base (4-((thiophene-2-ylmethylene)amino)benzamide) (4-TAB) on mild steel in 1.0 M HCl solution. The inhibition efficiency of the 4-TAB is analysed by using electrochemical analysis, solution assay analysis, and theoretical ca...
Article
Electrochemical iron-copper-nickel coatings on nickel mesh with two electrode technique were performed galvanostatically. The current density and the durations are changed during the coatings and the coatings are applied at different currents but at constant charge. All electrodepositions were applied under the same charge. In this study, different...
Article
Full-text available
This paper reports the development of zinc oxide films electrodeposited at different potentials on tin-doped indium oxide substrates. The effect of deposition potential on ZnO microstructure, optical absorption, and photocatalytic activity for water splitting reaction were studied in detail. The films were potentiodynamically grown by applying diff...
Article
Gallium-doped zinc oxide has been widely accepted as the potential alternative to expensive tin-doped indium oxide (ITO) for transparent conductive layer applications. An extensive study reports the processing of ZnO-based semiconductor materials by utilizing a sol-gel method, however, no study has been reported to investigate both the kinetic and...
Chapter
Electrolyte is the part of the electrochemical cell consists of an anode, a cathode, and an electrolyte which provide the completion of the reactions occurring at the surface of these two electrodes. Electrolytes that are responsible for conducting the electricity via ions can be used in different forms according to the system conditions. When sele...
Conference Paper
Full-text available
Phase change materials (PCM) can be used in passive building applications to achieve near zero energy building goals. For this purpose PCM can be added in building structures and materials in different forms. Direct incorporation, form stabilization and microencapsulation are different forms used for PCM integration in building materials. In additi...
Article
Incorporating impurities in ZnO provide opportunities to manipulate its electronic and optical properties, which can be exploited for optoelectronic device applications. Among various elements doped in ZnO crystal structure, limited attempts have been accounted for the Sr–doped ZnO system. Further, no theoretical evidence has been reported so far t...
Article
Full-text available
Photoelectrochemical cells guarantee the production of hydrogen as the clean energy source to overcome energy crisis. In this study, we have explored the impact of MoS2 as the interfacial layer in the CuO–TiO2 composite photocathode framework. The CuO was electrodeposited on the indium tin oxide (ITO) coated glass substrates and subsequently treate...
Article
The aim of this study is to evaluate thermal and corrosion behavior of concrete with fatty acid (FA) mixture as phase change material (PCM) used for energy saving in buildings. We compared direct use of fatty acid mixture (capric acid and myristic acid) and its microencapsulated form in concrete. The work is based on thermal analyses (DSC, TGA, the...
Article
In this study, titanium oxide nano-tubes are doped with Ni and Mo particles with various chemical compositions, in order to put forth the efficiency of single and binary coatings on hydrogen evolution reaction (HER) in 1 M KOH. The characterization was achieved by cyclic voltammetry, scanning electron microscopy and energy dispersive X-ray analysis...
Article
This paper explores the effect of electrodeposition time on microstructure, optical, and photoelectrochemical properties of CuO films. CuO films were electrochemically deposited on tin-doped indium oxide (ITO) substrates using a Cu2O electrodeposition method followed by annealing at 550 °C for 2 h. The electrochemical deposition was carried out at...
Article
The effect of 4-amino-5-(4-pyridyl)-4H-1,2,4-triazole-3-thiol (4APT) on the corrosion of mild steel in hydrochloric acid solution was investigated as electrochemically, theoretically and qualitatively. Inhibition efficiency of 4APT on mild steel surface was observed and illuminated by EIS, potentiodynamic polarization, SEM and FTIR techniques. All...
Article
It is important to metal deposition on the electrode surface to increase the electrocatalytic activity of the electrodes. CoWZn coated the graphite rod was used to prepare the cathode electrode. Moreover, then Pt and Ru metals were deposited on the electrode surface. These electrodes were named as CoWZnPt and CoWZnRu. Cyclic voltammetry, electroche...
Article
Background: Patients use mouthwashes in addition to mechanical cleaning during orthodontic treatment. The effects of mouthwashes on the archwires have not been examined yet. Objective: To compare the corrosion resistance of four different arch wires and corrosion effects of different mouthwashes to formulate a biocompatible and mechanically usef...
Article
The binary FeZn was electrodeposited on graphite surface for hydrogen evolution reactions. Then, zinc was leached from the surface by an etching method in alkaline solution. A trace amount of platinum and ruthenium electrochemically deposited on binary FeZn, respectively. All electrodes were characterized by cyclic voltammetry, electrochemical impe...
Article
Purpose The purpose of this paper is to investigate the adsorption and corrosion inhibition of two isomeric compounds (C4H5N3) as aminopyrazine (AP) and 2-amino-pyrimidine (2AP) on mild steel (MS) in 0.5 M HCl. The study was a trial to combine experimental and modelling studies and research effect of molecular geometry on inhibition effect of inhib...
Article
The influence of nonaqueous electrolytes has been applied in the rechargeable Li-air battery. Discharged Li-air battery cathodes are investigated with palladium oxide (PdO) catalysts in four electrolytes which are different mixtures of lithium perchlorate, lithium hexaflourophosphate, ethylene carbonate, dimethyl carbonate, diethyl carbonate. Lithi...
Article
Full-text available
Cu/Ni/NiZn-Pd composite coatings were fabricated by combination of electrochemical and a simple chemical replacing methods to enhance hydrogen evolution activity of Raney-type electrodes and reduce the amount of Pd in the fabrication of cathodes for alkaline water electrolysis. The electrodes were characterized by scanning electron microscopy (SEM)...
Article
This study presents electrochemical preparation and characterization of PtRu-modified Cu/Ni/NiZn electrodes (Cu/Ni/NiZn–PtRu) as cathode materials for alkaline water electrolysis. The electrodes were characterized using energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Their elect...
Article
Full-text available
The power density of direct methanol fuel cells (DMFCs) can be changed by using different anode materials. Especially porous materials are preferred for the anode. In the present study, multiwall carbon nanotubes were first injected into graphite. Then, by depositing nickel, a catalyst was prepared for use as the anode material of the DMFC. This ca...
Article
A gel/LiMo catalyst was prepared as a cathode material via the solegel process and applied calcination at different times. The influence of calcination times, properties and the electrochemical performance of the catalyst were investigated by utilizing cyclic voltam-metry, potentiodynamic polarization and electrochemical impedance spectroscopy tech...
Conference Paper
Full-text available
Hydrogen energy alternative to fossil fuels is considered as an energy source of the future. There are different methods for production of hydrogen, but their most preferred is electrolysis method. Electrocatalytic electrodes for electrolysis process are investigated. It is asked that the electrodes must have low overpotential [1]. In this study, w...
Article
Electrocatalytic oxidation of methanol in alkaline solution on a NiCd/C catalyst chemically modified by a leaching process of Zn was investigated. Scanning electron microscopy (SEM), X-ray florescence spectroscopy (XRF) and atomic force microscopy (AFM) were used for coating characterization. The electrochemical properties and behaviors and also ki...
Article
The effect of 2-amino-4-methylpyridine (AMP) on the corrosion behavior of mild steel (MS) in 0.5 M HCl is investigated with electrochemical methods and theoretical calculations. The electrochemical tests show that the polarization resistance of MS increasing the presence of AMP in acid solution. Adsorption of AMP on MS surface is a physical and obe...
Article
A Platinum-modified alloy coating with high hydrogen evolution reaction (HER) durability activity was prepared by electrodeposition. The durability of this catalyst was determined with electrolysis technique for 120 h. The prepared electrode was characterized by energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and scanning...
Article
The inhibitory effect of Rhodanine (RD) on copper in acidic media has been investigated by electrochemical impedance spectroscopy (EIS) and surface-enhance Raman scattering (SERS) spectroscopy. Roughened copper was used for EIS experiments to better compare with SERS results. The EIS results show two loops in the Nyquist plot, one of which is assoc...
Article
Cobalt-modified nickel-zinc catalyst CuNi(Zn)Co is prepared on a copper substrate by using electrodeposition. Its catalytic efficiency for methanol oxidation is studied with cyclic voltammetry, chronoamperometry, and chronopotentiometry techniques. The surface morphology and chemical composition of catalyst are characterized by scanning electron mi...
Article
The methanol oxidation on C/NiZn-Ru electrode in a 1.00 M KOH and 1.00 M KOH + 1.00 M methanol solutions at different scan rates and temperatures was studied by the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) techniques. The graphite electrode is coated in a nickel-zinc bath by electrodeposition...
Article
The inhibition effect of Rhodanine-N-acetic acid (R-NA) on copper corrosion in acidic media is studied by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR). The surface morphology is investigated by using scanning electron microscopy (SEM). The exposure of copper surface to 0....
Article
NiMn composite catalysts (C/NiMn, C/NiMnZn, C/NiMnZn–PtRu and C/NiMnZn–PtPd) have been prepared on the graphite substrate (C) by electrochemical deposition as electrocatalytic materials for hydrogen evolution reaction (HER). The NiMnZn coatings were etched in a concentrated alkaline solution (30% NaOH) to produce a porous and electrocatalytic surfa...
Article
The hydrogen evolution behavior of C/CoSn, C/CoSnZn and C/CoSnZn–Pd catalysts which were prepared on a graphite substrate (C) by electrochemical deposition, as well as their electrochemical properties in the KOH solutions, have been investigated by the polarization measurements, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and e...
Article
The electrochemical synthesis of poly(3-amino-1,2,4-triazole) (PATA) on the platinum (Pt) electrode was achieved in ammonium oxalate solution by cyclic voltammetry technique. The conductivity of film was measured with four probe technique, the surface morphology was monitored with atomic force microscopy (AFM) and characterization was achieved by F...
Article
Full-text available
Titanium oxide nano tubes (TiOx) were prepared by the electrochemical anodizing method from at different process time and different potential in 0.1 M HF solution. Their morphologies were determined with surface photographs and scanning electron microscopy (SEM) images. Ni nano particles were deposited in conductive TiOx nano tubes arrays via pulse...
Article
A Ni-modified carbon felt (C) electrode (C/Ni) was used as a substrate for preparation of Pt-modified electrode in view of its possible application as electrocatalytic material for the hydrogen evolution activity. The prepared electrode was characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and cyclic vo...
Article
In this study, the carbon felt (C-felt) is used as the catalyst support for Ni, Co and NiCo coatings. Single Ni, Co and binary NiCo coatings are electrochemically deposited on a C-felt. Surface structure of coatings was characterized by cyclic voltammetry (CV), atomic absorption spectroscopy (AAS) and scanning electron microscopy (SEM). The electro...
Article
2-Thiohydantoin (2-THD) was investigated as a corrosion inhibitor of mild steel (MS) in 0.1 M HCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR) measurements. The effects of temperature, hydrogen gas evolution and change of open circuit potential with immersion tim...
Article
The nickel–cadmium (Ni-promoted Cd) catalyst for using direct methanol fuel cell (DMFC) applications is electrochemically deposited on a graphite substrate. The activity of methanol oxidation is assessed by recording cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) techniques. The surface morphologies and...
Article
Corrosion inhibition effect of rhodanine-N-acetic acid (R-NA) on mild steel (MS) corrosion in 0.1 M HCl solution was investigated. For this purpose, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) as well as hydrogen gas evolution (VH2−tVH2−t) and the change of open circuit potential...
Article
The corrosion behavior of 7075 aluminum (Al), copper modified Al (Al/Cu), polypyrrole modified Al (Al/PPy) and copper (under layer)/polypyrrole (top layer) modified Al (Al/Cu/PPy) samples were investigated in 3.5% NaCl solution. The copper plating on aluminum was carried out from acidic copper sulphate solution by electroless method. Polypyrrole (P...
Article
The corrosion inhibition effect of N-aminorhodanine (N-AR) on mild steel (MS) in 0.5M H2SO4 was studied in both short and long immersion duration using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), chronoamperometry and hydrogen gas evolution. The surface morphology of MS was exami...
Article
The inhibition effect of 3-amino-1,2,4-triazole-5-thiol (3ATA5T) was investigated in 0.5M HCl on carbon steel (CS) by electrochemical impedance spectroscopy and potentiodynamic measurements at various concentrations and temperatures. Results showed that the correlation between experimental (inhibition efficiencies, ΔGads, Ea) and quantum calculatio...
Article
Poly-2-aminothiazole (pAT) was electrochemically synthesized on a mild steel (MS) specimen from 0.3 M aqueous ammonium oxalate solution containing 0.01 M 2-aminothiazole (2-AT) using cyclic voltammetry technique. The synthesized polymer film was then modified by electrodeposition of 100 μg cm−2 Ni (MS/pAT–Ni) and Zn (MS/pAT–Zn) on top of the polyme...
Article
The synergistic inhibition effect of rhodanine (Rdn) and iodide ion on the corrosion of copper in 0.5M H2SO4 solution was studied using electrochemical techniques. The surface morphologies of the substrates were examined by scanning electron microscopy (SEM). Elemental analysis of electrode surface exposed to test solution was determined by energy...
Article
The corrosion behavior of carbon steel (CS) was investigated in 3.5% NaCl solution in the presence and absence of Spirulina platensis (SP) bacteria. For this purpose, the weight loss measurements, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization techniques were used. The counts of SP were monitored with UV–VIS spectrophoto...