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Your search keyword '"Yola, Mehmet Lütfi"' showing total 13 results
Start Over Author "Yola, Mehmet Lütfi" Journal journal of the electrochemical society
13 results on '"Yola, Mehmet Lütfi"'

11. 3D Polyoxometalate-Functionalized Graphene Quantum Dots with Mono-Metallic and Bi-Metallic Nanoparticles for Application in Direct Methanol Fuel Cells.

Author

Çolak, Alper Tolga, Eren, Tanju, Yola, Mehmet Lütfi, Beşli, Erdem, Şahin, Onur, and Atar, Necip

Subjects
POLYOXOMETALATES, ELECTRIC properties of graphene, QUANTUM dots, NANOPARTICLES, METHANOL as fuel, FUEL cells
Abstract

A fuel cell is an electrochemical cell that converts a source fuel into an electrical current. It generates electricity inside a cell through reactions between a fuel and an oxidant, triggered in the presence of an electrolyte. Fuel cells have been attracting more and more attention in recent decades due to high-energy demands, fossil fuel depletions, and environmental pollution throughoutworld. Afacile and cost-effective catalysts have been developed on polyoxometalate (NaPWO) functionalized graphene quantum dots (GQDs) with several mono-metallic and bi-metallic nanoparticles such as platinum nanoparticles (PtNPs), palladium nanoparticles (PdNPs) and platinum-palladium nanoparticles (Pt-PdNPs). The successful synthesis of nanomaterials and the prepared glassy carbon electrode (GCE) surfaces were confirmed by transmission electron microscope (TEM), X-ray photo electron spectroscopy (XPS), scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) method. According to TEM images, the average particle sizes of PtNPs and PdNPs were found to be approximately 20-30 nm. The Pt-PdNPs/NaPWO/GQDs also exhibited a higher peak current for methanol oxidation than those of comparable PdNPs/NaPWO/GQDs and PtNPs/NaPWO/GQDs, thus providing evidence for its higher electro-catalytic activity. [ABSTRACT FROM AUTHOR]

Published
2016
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12. Electrochemical Sensor Based on Au@nitrogen-Doped Carbon Quantum Dots@Ag Core-Shell Composite Including Molecular Imprinted Polymer for Metobromuron Recognition

Author

Necip Atar, Tugba Raika Kiran, Mehmet Lütfi Yola, Mühendislik ve Doğa Bilimleri Fakültesi -- Biyomedikal Mühendisliği Bölümü, Kıran, Tuǧba Raika, and Yola, Mehmet Lütfi

Subjects
Cyclic voltammetry, Polymers, Composite number, Mass-spectrometry, Nitrogen doped, Pesticide-residues, Core shell, Nitrogen-doped carbons, Chronoamperometry, Metabolites, Materials Chemistry, Electrochemistry, Semiconductor quantum dots, Graphene oxide, Molecular imprinted polymer (MIP), Electrochemical recognition, Energy dispersive x-ray, Photocatalyst, Fourier transform infrared spectroscopy, Nanomaterial, Condensed Matter Physics, Chlorine compounds, Nanocrystals, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Electroanalytical method, Boron-nitride nanosheets, Carbon quantum dots, Synthesis (chemical), Silver nanoparticles, Methemoglobinemia, Electrochemical impedance spectroscopy, Materials science, Nitrogen, Materials Science, Metal nanoparticles, Electrochemical sensors, Gold nanoparticles, Core-shell composites, Shells (structures), Doping (additives), Electrocatalytic performance, Herbicides, Renewable Energy, Sustainability and the Environment, Molecularly imprinted polymer, Molecular imprinted polymers, Carbon, Electrochemical gas sensor, Chemical engineering, Uric Acid | Dopamine | Glassy Carbon Electrode, Nanoparticles, Silver compounds, Coatings & Films, Gold compounds, Transmission electron microscopy
Abstract

WOS: 000487854600001, Electrochemical recognition based on Au@nitrogen-doped carbon quantum dots@Ag core-shell (Au NPs@NCDS@Ag NPs) composite including molecular imprinted polymer (MIP) was presented for metobromuron (MBN) detection. Firstly, novel triple-layered core-shell structure including gold nanoparticles core, nitrogen-doped carbon quantum dots interlayer and silver nanoparticles outside shell was synthesized by the reduction of chloroauric acid (HAuCl4), silver nitrate (AgNO3) in the presence of NCDS. Secondly, MBN imprinted polymer on Au NPs@NCDS@Ag NPs composite was electrochemically performed in the presence of pyrrole and MBN via cyclic voltammetry (CV). Fourier-transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), energy-dispersive x-ray (EDX) spectroscopy, x-ray diffraction (XRD) method and electroanalytical methods such as CV, chronoamperometry (CA), electrochemical impedance spectroscopy (EIS) were performed for characterizations of core-shell structure. MBN imprinted electrode showed high electrocatalytic performance and the linear range of 1.0 x 10(-12)-2.0 x 10(-9) M and detection limit (LOD) of 2.0 x 10(-13) M were obtained. (C) 2019 The Electrochemical Society.

Published
2019

13. Phenylethanolamine A (PEA) Imprinted Polymer on Carbon Nitride Nanotubes/Graphene Quantum Dots/Core-Shell Nanoparticle Composite for Electrochemical PEA Detection in Urine Sample

Author

Mehmet Lütfi Yola, Necip Atar, Mühendislik ve Doğa Bilimleri Fakültesi -- Biyomedikal Mühendisliği Bölümü, and Yola, Mehmet Lütfi

Subjects
Cyclic voltammetry, Electrode, X ray photoelectron spectroscopy, Nanoparticle, 02 engineering and technology, Nitride, 01 natural sciences, Chromatography/tandem mass-spectrometry, Nanocomposites, law.invention, Clenbuterol | Ractopamine | Salbutamol Sulphate, chemistry.chemical_compound, law, 2-aminoethanethiol, Materials Chemistry, Electrochemistry, Semiconductor quantum dots, Carbon nitride, Graphene oxide, Molecular imprinted polymer (MIP), Nanotubes, Hydrothermal treatments, X ray diffraction analysis, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Core shell nanoparticles, Nanocrystals, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Dielectric spectroscopy, Body fluids, Glass membrane electrodes, 0210 nano-technology, Electrochemical impedance spectroscopy, Scanning electron microscopy, Dots, Voltammetric sensor, Materials science, Carbon nitride nanotubes, Materials Science, Chemical detection, Energy dispersive x-ray analysis (EDX), Energy dispersive X ray analysis, Nitrides, Beta-agonists, Yarn, Clenbuterol, Bimetallic nanoparticles, Sensor, Tissue, Nanocomposite, Renewable Energy, Sustainability and the Environment, Graphene, Ruthenium compounds, 010401 analytical chemistry, Functionalized graphene, Spectrum analysis, 0104 chemical sciences, Chemical engineering, Nanocrystal, chemistry, Glassy carbon electrodes, Quantum dot, Linked-immunosorbent-assay, Coatings & Films, Gold compounds, Transmission electron microscopy
Abstract

WOS: 000431786800117, Phenylethanolamine A (PEA) is used illegally and deposited in animal tissues. Due to the reason, it causes acute poisoning and symptoms of muscular tremors, nervousness. In present article, Ru@Au core-shell nanoparticles (Ru@Au NPs) involved in carbon nitride nanotubes (C3N4 NTs) functionalized graphene quantum dots (GQDs) nanocomposite based molecular imprinted polymer (MIP) was formed for PEA recognition. Firstly, C3N4 NTs@GQDs nanocomposite was prepared by means of hydrothermal treatment. Secondly, this nanocomposite was functionalized with 2-aminoethanethiol (AET) via the affinity of gold-sulfur for binding Ru@Au NPs. After that, PEA imprinted voltammetric sensor was prepared in presence of 100.0 mM phenol as monomer containing 25.0 mM PEA by cyclic voltammetry (CV). All nanomaterials' formation and properties were highlighted with scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray analysis (EDX), raman spectroscopy, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). 1.0 x 10(-12) -1.0 x 10(-9) M and 2.0 x 10(-13) M were founded as the linearity range and the detection limit (LOD). Finally, PEA imprinted glassy carbon electrode (GCE) was used for urine sample analysis in presence of the other competitor agents such as clenbuterol (CLE), ractopamine (RAC) and salbutamol (SAL). In addition, the stability and repeatability of prepared sensor was investigated. (C) 2018 The Electrochemical Society., Scientific and Technological Research Council of Turkey (TUBITAK) [116Z153]; TUBITAK, This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK), with project number 116Z153. We thank TUBITAK for the financial support.

Published
2018

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