Tıbbi Hizmetler ve Teknikler Bölümü

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Browsing Tıbbi Hizmetler ve Teknikler Bölümü by Institution Author "Ece, Mehmet Şakir (56412770400)"

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    Citation - WoS: 19
    Citation - Scopus: 22
    Synthesis and characterization of activated carbon supported magnetic nanoparticles (Fe3O4/AC@SiO2@Sulfanilamide) and its application in removal of toluene and benzene
    (Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021) Ece, Mehmet Şakir
    In this study, the Fe3O4/AC@SiO2@Sulfanilamide magnetic nanoparticles were successfully synthesized as a highly effective magnetic nano adsorbent and applied for the adsorption of toluene and benzene in the gas phase for the first time. The magnetic nano-adsorbents were characterized by the Brunauer-Emmett-Teller surface area analysis, Differential Thermal Analysis, Thermal Gravimetric Analysis, Fourier Transform Infrared Spectroscopy, Vibrating Sample Magnetometer, Scanning Electron Microscopy and Energy-Dispersive X-Ray Spectroscopy measurements. Besides, the process parameters that affect the adsorption were optimized using the response surface methodology. Optimum conditions of process factors such as contact time, temperature and initial concentration were determined as 59 min, 25 °C and 18 mg/L for toluene, and as 55 min, 28 °C and 15 mg/L for benzene. The maximum adsorption capacity for toluene and benzene was as 612 and 557 mg/g, respectively, under optimal process conditions. Even after five consecutive repetitions, the Fe3O4/AC@SiO2@Sulfanilamide showed high repeatability and retained 89 % and 88 % of its initial adsorption capacity for toluene and benzene, respectively. Kinetic and equilibrium models were investigated. According to these study results, it can be said that having easy synthesis process, high adsorption capacity and reusability performance makes the Fe3O4/AC@SiO2@Sulfanilamide a promising magnetic nano adsorbent.
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    Citation - WoS: 9
    Citation - Scopus: 10
    Synthesis, characterization and investigation of some physical textures of magnetite-silica-L-Proline nanoparticles modified with some transition metals (Co, Mn, Cu, Ni)
    (ScienceDirect, 2023) Ece, Mehmet Şakir
    Background: The search for new magnetic nanomaterials continues for many solution-oriented applications such as material science, surface science, coating technology, surface engineering, battery, energy storage, catalyst and adsorption. Magnetic nanomaterials have a wide and effective range of applications in solving many problems. While nanomaterials have found solutions to many problems, the production processes of these materials have increased concerns about the natural balance of the environment and human health. The concepts of “green chemistry” and “sustainable materials” find solutions to these concerns. In this study, new magnetic nanomaterials were produced with the approaches of “green chemistry” and “sustainable material”. Considering the physical and chemical properties of these magnetic nanomaterials, they are potential candidate materials that can be used in different applications. Methods: Fe3O4 magnetic nanomaterials were synthesized through co-precipitation and then Fe3O4 magnetic nanomaterials were coated with silica (Fe3O4@SiO2) using sol–gel (Stober ¨ process) method. Subsequently, Fe3O4@SiO2 magnetic nanomaterials were bonded with organic functional group containing amine (Fe3O4@SiO2@L-Pro). Finally, Fe3O4@SiO2@L-Pro magnetic nanomaterials were immobilized with transition metals (Fe3O4@SiO2@L-Pro-X, (X = Co, Mn, Cu, Ni)). Magnetic nanomaterials were characterized by various spectroscopic techniques (VSM, SEM, SEM-EDX, TGA, DTA, FT-IR, UV–Vis.Spect., XRD, BET,) analyzes revealed that the production of magnetic nanomaterials was carried out successfully. Significant findings: Fe3O4@SiO2@L-Pro-X (X = Co, Mn, Cu, Ni) is new products. The magnetic nanomaterials produced in this study were found to be capable of magnetic property, superparamagnetic character, mesopore character, suitable surface area, visible-light active character, crystalline cubic spinel form, thermal/mechanical stability.