Browsing by Author "Burhan, H."

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Arum Italicum Mediated Silver Nanoparticles: Synthesis and Investigation of Some Biochemical Parameters
(Academic Press Inc., 2022) Meydan, I.; Seckin, H.; Burhan, H.; Gür, T.; Tanhaei, B.; Sen, F.
The science world advancing day by day contributes to living systems in many areas with the development of nanotechnology. Besides being easily obtained from plants, the advantages it brings increase the importance of nanotechnology. Environmentally friendly, economical, and compatible with plants are just a few of the advantages it brings. Silver metal is one of the most preferred active ingredients in nanoparticle synthesis. Arum italicum is used in the treatment of various diseases in the health sector due to the structures it contains. In our study, nanoparticle synthesis was made by using Ag metal with Arum italicum plant. Then, the antimicrobial, DNA damage prevention and DPPH radical quenching activity of Ag NPs/Ai nanoparticles were investigated. The interaction of the plant with Ag, analysis by X-ray diffraction (XRD), UV visible spectrophotometer (UV–vis), scanning electron microscope and energy dispersive X-ray (SEM-EDX), Fourier-converted infrared spectroscopy (FT-IR) methods has been done. It has been observed that Ag NPs/Ai clusters formed by Arum italicum with Ag have an antibacterial effect against Bacillus subtilis, Bacillus cereus, Enterococcus faecalis, Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli pathogens. However, an antifungal effect hasn't been observed against Candida albicans fungus. Pseudomonas aeruginosa bacteria exerted a stronger effect than an antibiotic. It is seen that Ag NPs/Ai has a protective and anti-damage effect against DNA damage. The antioxidant effect of Ag NPs/Ai is remarkable when DPPH radical quenching activity is compared to positive control BHA and BHT. © 2021 Elsevier Inc.
Graphene Functionalizations on Copper by Spectroscopic Techniques
(Springer International Publishing, 2019) Gülcan, M.; Aygün, A.; Almousa, F.; Burhan, H.; Khan, A.; Şen, F.
Graphene is a two-dimensional allotrope of the carbon element, which is one of the most powerful materials of the 21st century. In order to facilitate the processing of the graphene, solvent-supported methods such as rotation coating, layer by layer assembly, and filtration are used. Single layer graphene prevents agglomeration of the material while reducing reactions occur. According to the studies in the literature, the chemical functionalization of graphene is performed by covalent and non-covalent modification techniques on substrate like copper. Besides, graphene can be used in many material production areas, such as polymer nanocomposites, drug delivery system, supercapacitor devices, solar cells, biosensors, and memory devices. © 2019, Springer Nature Singapore Pte Ltd.
Magnetic Nanoparticles
(Elsevier, 2020) Acidereli, H.; Karataş, Y.; Burhan, H.; Gülcan, M.; Şen, F.
Magnetic nanoparticles (MNPs) have widespread attention because of their unique features. For a few decades, growing development in chemical synthesis of nanomaterials and material surface modification have been seen and performed in numerous applications including biomedicine, biotechnology, catalysis, magnetic chemistry thermoelectric materials, etc. Various methods for fabrication of MNPs which have a controllable size, distribution, and surface modification have been reported. In these methods, several techniques containing irradiation, microwave, ultrasonication, vapor deposition, electrochemical, and microwave are applied to produce MNPs either in bottom-up or top-down processes. Generally, magnetic synthesis of nanoparticles is carried out by using these two processes. Nanomaterials with magnetic properties have wide applications in many fields such as biology, medicine, and engineering. In this section, the recent developments in the structures, occurrences, most commonly used samples, and common areas of use of the MNPs are given. © 2021 Elsevier Inc. All rights reserved.
Pt-Based Catalysts for Alcohol Oxidation
(Elsevier, 2021) Burhan, H.; Arikan, K.; Bekmezci, M.; Gurc, T.; Şen, F.
The development of fuel cell technologies and the use of clean energy sources have recently accelerated considerably. Fuel cells are electrochemical devices that convert chemical energy into electrical energy with an efficiency of 40%-80%. Fuel cells have many advantages, such as high efficiency, environmental friendliness, silent operation, and light weight, and it can be applied in vehicles and power plants. A fuel cell consists of an anode, the electrolyte medium that transmits the hydrogen ion and the cathode. As the fuel feeds from the anode alcohol, the cathode meets the oxygen source for the air itself. As a result of reactions in the electrodes, electrical energy is produced and water vapor from cathode, waste fuel, and CO2 is given off from the anode as by-products. In this chapter, detailed information about the types and properties of platinum-based catalysts for the alcohol oxidation of fuel cells and their applications are provided by compiling information from the research literature. In addition, economic evaluations were made by specifying the positive and negative aspects of these materials. © 2021 Elsevier Inc. All rights reserved.