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Bulunan: 15 Adet 0.000 sn
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Bulunan: 15 Adet 0.000 sn
Yayımlanma Yılı : 2022 ✕Araştırmacılar : Nahit AKTAŞ ✕
Koleksiyon [1]
Araştırmacılar [2]
BM Sürdürülebilir Kalkınma [3]
Fakültesi / Enstitütü [1]
Yayın Türü [2]
Yayımlanma Yılı [1]
Dil [1]
Kaynak [11]
Veri Tabanları [6]
İndex Türü [3]
Yayıncı [5]
Bölümü [1]
Ulusal/Uluslararası [1]
Konu Başlıkları [35]
Prof. Dr. Nahit AKTAŞMühendislik Fakültesi
Erişime Açık

Polymeric Organo-Hydrogels: Novel Biomaterials for Medical, Pharmaceutical, and Drug Delivery Platforms

Nahit AKTAŞ

In the recent two decades, tremendous devices and materials such as stents, biomimetic organs, scaffolds, and vessels have been developed for medical purposes. When such devices are utilized in the body, the side effects or biocompatibility of the materials have to be studied extensively. Interdisciplinary studies have reviled numerous strategies to overcome adverse body reactions against implanted devices. Besides naturally occurring materials such as collagen, chitosan, hyaluronic acid, and dextran, various synthetic and modified materials such as poly(lactic acid), poly(ethylene glycol), po ...Daha fazlası

İnceleme 2022 Mühendislik Fakültesi Frontiers in Materials9 33 Görüntülenme
Erişime Açık

pH-Responsive Amphoteric p (APTMACl-co-AMPS) Hydrogel as Effective Multiple Dye Sponge Network From Aqueous Media

Nahit AKTAŞ

Here, the cationic poly (3-acrylamidepropyl trimethyl ammonium chloride) [p (APTMACl)], anionic poly (2-acrylamido-2methylpropane sulfonic acid) [p (AMPS)], and amphoteric poly (APTMACl-co-AMPS) hydrogels were prepared via free-radical polymerization techniques as pH-sensitive hydrogels. The prepared systems were used in methylene blue (MB), and Eosin Y (EY) removal from aqueous media. HCl-treated p (APTMACl-co-AMPS) hydrogels prepared in 1:3 mol ratio adsorbed higher amount of MB and EY from their corresponding 50 ml 50 ppm aqueous solutions that are 47.5 /- 0.9, and 10.7 /- 0.1 mg/g, respect ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Frontiers in Materials9 87 Görüntülenme
Erişime Açık

Non-Metal Polymeric Bioparticles Based on Maleic Acid/Citric Acid as a Catalyst for H-2 Generation from NaBH4

Nahit AKTAŞ

Novel metal-free catalysts were synthesized form maleic acid (MA) and citric acid (CA) based polymers for hydrogen generation form NaBH4. Surfactant-free-self-emulsion polymerization technique was used to synthesize poly(Maleic acid)(poly(MA)), poly(Citric acid)(poly(CA)) and poly(Maleic acid-co-Citric Acid) poly(MA-co-CA)) polymeric micro-particles in a single step. The prepared catalysts were characterized by zeta potential, SEM, FTIR and TGA. The hydrodynamic diameter of the poly(MA), poly(CA) and poly(MA-co-CA) micro-particles were found to be 0.681, 1.273, 1.604 mu m and the zeta potentia ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Journal of Polymers and the Environment30 ( 9 ) 132 Görüntülenme
Erişime Açık

Novel gallium-based voltammetric sensor for sensitive detection of cysteine

Nahit AKTAŞ

Carbon nanotube-supported gallium (Ga/CNT) was synthesized and characterized with energy dispersive X-ray scanning electron microscopy, temperature-programmed reduction, temperature-programmed oxidation, and temperature-programmed desorption methods. Characterization results revealed successful preparation of Ga/ CNT. Electrochemical measurements were performed by cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. The Ga/CNT-based cysteine sensor had a linear response within the range of 0-200 mu M with current sensitivity of 0.0081 mu A/mu M (114 m ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Journal of Physics and Chemistry of Solids169 193 Görüntülenme
Erişime Açık

Agar and Sesame Oil Based Organo-Hydrogels as a Pharmaceutical Excipient in Paracetamol/Carboplatin Release Systems

Nahit AKTAŞ

Organo-hydrogels were synthesized by using free radical polymerization in the emulsion technique, using agar, glycerol, sesame oil, ammonium persulfate as initiator and N,N'-methylene bisacrylamide or glutaraldehyde as crosslinker. Swelling behaviors, blood compatibility, antioxidant and properties of the organo-hydrogels were investigated thoroughly. The highest swelling value was seen in organo-hydrogel synthesized with the N,N'-methylene bisacrylamide crosslinker containing 0.1 ml of sesame oil. Moreover, drug release behaviors of organo-hydrogels were studied as paracetamol and carboplatin ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Indian Journal of Pharmaceutical Sciences84 ( 2 ) 41 Görüntülenme
Erişime Açık

Hydrogen Production from Methanolysis of Sodium Borohydride by Non-metal p(CO) Organo-particles Synthesized from Castor Oil

Nahit AKTAŞ

In this study, the poly (Castor Oil) (p(CO)) organo-particle from natural castor oil (CO) was synthesized for the first time in literature for sodium boron hydride (NaBH4) methanolysis hydrogen production. As is known, catalysts are used in most reactions performed in the chemical industry. Here, by analytical method, Fourier Transform Infrared Spectroscopy (FT-IR), Thermal Gravimetric Analyzer (TGA) and Ultra Field Emission Energy Dispersive Spectroscopy (SEM) analyzes of the catalyst were performed and the characteristics of the catalyst were determined. Also for the methanolysis of the p(CO ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Journal of Polymers and the Environment30 ( 11 ) 49 Görüntülenme
Erişime Açık

The role and effect of CdS-based TiO2 photocatalysts enhanced with a wetness impregnation method for efficient photocatalytic glucose electrooxidation

Nahit AKTAŞ

The 0.1 CdS-based TiO2 photocatalysts with different atomic ratios were synthesized by the wetness impregnation (WI) method. These photocatalysts were characterized to actively determine surface area using TPx analyses (TPR, TPO, and TPD). Furthermore, surface structures and properties of photocatalysts were defined by analyses such as XRD, UV-VIS spectroscopy, SEM-EDX and mapping, fluorescence spectroscopy, TEM-EDS, and XPS. The photocatalytic activities of photocatalysts were examined by CV, CA, and EIS electrochemical analyses to investigate use in photocatalytic fuel cells (PFCs) in glucos ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Surfaces and Interfaces33 18 Görüntülenme
Erişime Açık

Novel Cacao oil-based organo-hydrogels to detect carcinoma antigen 125 in serum medium; synthesis, characterization, and electrochemical measurements

Nahit AKTAŞ

In present study, cacao oil-based organo-hydrogels (OHCOs) are synthesized to detect carcinoma antigen 125 (CA-125) in serum medium with electrochemical methods such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). OHCOs are prepared by the free radical polymerization reaction with agar, glycerol, and distinct ratios of cacao oil with glutaraldehyde (GA) crosslinker or methylene bisacrylamide (MBA) crosslinker. OHCOs are characterized via Fourier Transform Infrared Spec-troscopy (FT-IR), in different solvent environments and pH ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Materials Chemistry and Physics292 43 Görüntülenme
Erişime Açık

A REMARKABLE SYNERGIC EFFECT OF POLY (ACRYCLIC ACID) HYDROGEL ANCHORED PD CATALYSTS IN FORMIC ACID ELECTROOXIDATION REACTION

Nahit AKTAŞ

Polymer-based catalysts have never been used before as anode catalysts in direct formic acid fuel cells. At present, Poly (acrylic acid), Poly (AA) was prepared and electrodes were constructed on graphite pencil (G) from these hydrogels. Furthermore, Pd doped Poly (AA)/G electrodes were prepared by employing electrodeposition techniques, and their formic acid electrooxidation (FAEO) activities were examined via cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. These electrodes were characterized by DT-TGA, FTIR, and SEM-EDX. It was observed that Poly (AA)/G wer ...Daha fazlası

Makale 2022 Mühendislik Fakültesi International Journal of Ecosystems and Ecology Science - IJEES12 ( 4 ) 178 Görüntülenme
Erişime Açık

Photocatalytic glucose electrooxidation of titanium dioxide doped CdTe enhanced for a photocatalytic fuel cell

Nahit AKTAŞ

The 0.1 CdTe/TiO2 photocatalysts with different atomic molar ratios (90-10, 70-30, 50-50, and 30-70) were synthesized by the wetness impregnation method and characterized by the XRD, SEM-EDX and mapping, N2 adsorption-desorption, ICP-MS, TEM-EDS and STEM mapping, UV-VIS spectroscopy, fluorescence spectroscopy, XPS, TPR, TPO, and TPD analyses. The photocatalytic activities were examined to investigate by CV, CA, and EIS electrochemical analyses for photocatalytic fuel cells (PFCs) in glucose solution in the dark and under UV illu-mination. The characterization analyses revealed that anatase TiO ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Fuel330 89 Görüntülenme
Erişime Açık

Synthesis of Poly(ginger oil) Organo Particles as a Metal Free Catalysis and Their Use in Hydrogen Production from Sodium Borohydride Methanolysis

Nahit AKTAŞ

The use of the metal free catalysts synthesized form natural and environmental friendly materials for fast generation of hydrogen is accomplished form sodium borohydride (NaBH4) methanolysis assays. Thus, green and metal free-catalysts were prepared form natural resources of ginger oil (GO). Polymeric GO particles were synthesized via emulsion polymerization technique and characterized in detail. The hydrodynamic diameters of p(GO) particles were found to be in the 220 nm and the zeta potential was - 162.48 mV. TGA results showed that thermal decomposition of microparticles was gradually conti ...Daha fazlası

Makale 2022 Mühendislik Fakültesi Journal of Polymers and the Environment31 ( 3 ) 27 Görüntülenme
Erişime Açık

Promoting formic acid and ethylene glycol electrooxidation activity on Ga modified Pd based catalysts

Hilal DEMİR KIVRAK | Nahit AKTAŞ

Herein, carbon nanotube (CNT)-supported Ga@PdAgCo catalysts were synthesized by sodium borohydride (SBH) sequential reduction method. These catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-mass spectrometry (ICP-MS). Characterization results revealed that these catalysts were succesfully preared at desired loading and atomic ratios. From the XRD pattern, the crystallite size of 0.5 Ga@PdAgCo(80:10:10)/CNT catalysts was found as 6.95 nm by utilizing the Scherrer equation. From ...Daha fazlası

Makale 2022 Mühendislik Fakültesi International Journal of Hydrogen Energy47 ( 83 ) 35 Görüntülenme
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