Development of Sulfonated Reduced Graphene Oxide Supported Metal Nanoclusters for the Reduction of Thioflavine-T Dye in Aqueous Media
No Thumbnail Available
Date
2021
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Bu yüksek lisans çalışmasında, öncelikli olarak kaynakçaya uygun olarak, grafen oksit (GO) ve onun fonksiyonel bir türevi olan sülfonlanmış indirgenmiş grafen oksit (rGO-SO3H) sentezlenmiştir. Daha sonra rGO-SO3H destekli Cu, Ag ve Au nanokümeleri tepkime içi hazırlanarak sulu ortamda, NaBH4 varlığında tiyoflavin-T organik boyar maddesinin katalitik indirgenmesindeki performansları incelenmiştir. Son olarak, hazırlanan indirgenmiş grafen oksit (rGO), sülfonlanmış indirgenmiş grafen oksit (rGO-SO3H) ve sülfonlanmış indirgenmiş grafen oksit destekli metal nanokümeleri, ICP-OES (İndüktif Eşleşmiş Plazma-Optik Emisyon Spektrometresi), XRD (X-Işınları Kırınımı), XPS (X-Işınları Fotoelektron Spektroskopisi), TEM (Geçirimli Elektron Mikroskopu), TEM/EDX (Geçirimli Elektron Mikroskopu/Enerji Dağılımlı X-Işını Spektroskopisi), HRTEM (Yüksek Çözünürlüklü Geçirimli Elektron Spektoskopisi), FT-IR (Fourier Dönüşümlü-İnfrared Spektroskopisi), NMR (Nükleer Mağnetik Rezonans) ve UV-vis (Ultraviyole ve Görünür Bölge Spektroskopisi) gibi ileri analitik ve spektroskopik yöntemler kullanılarak tanımlanmıştır. Tiyoflavin-T'nin katalitik indirgenme tepkimesi oda koşullarında UV-vis 3600 spektrofotometre kullanılarak izlenmiştir. Hazırlanan katalizörlerin tiyoflavin-T'nin katalitik indirgenme tepkimesindeki tekrar kullanılabilirlik performansları da incelendikten sonra farklı sıcaklıklarda katalitik tepkimeler gerçekleştirilerek en etkin nanokatalizör için aktivasyon parametreleri (Ea: Aktivasyon Enerjisi; ΔH*: Aktivasyon Entalpisi; ΔS*: Aktivasyon Entropisi) hesaplanmıştır. Anahtar kelimeler: Bakır; Boya uzaklaştırma; Nanoküme; Sülfonlanmış İndirgenmiş Grafen Oksit; Tiyoflavin-T
In this master's study, graphene oxide (GO) and its functionalized derivative, sulfonated reduced graphene oxide (rGO-SO3H), were synthesized in accordance with the literature. Subsequently, rGO-SO3H supported Cu, Ag and Au nanoclusters were prepared in-situ and their performances in catalytic reduction of thioflavin-T organic dyes in the presence of NaBH4 were investigated in aqueous medium. Finally, prepared reduced graphene oxide (rGO), sulfonated reduced graphene oxide (rGO-SO3H) and sulfonated reduced graphene oxide supported metal nanoclusters were characterized by using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer), XRD (X-Rays Diffraction), XPS (X-Ray Photoelectron Spectroscopy), TEM (Transmission Electron Microscope), TEM / EDX (Transmission Electron Microscope / Energy Dispersive X-Ray Spectroscopy), HRTEM (High Resolution Transmission Electron Spectroscopy), ATR-IR (Attenuated Total Reflactance-Infrared Spectroscopy), NMR (Nuclear Magnetic Resonance) and UV-vis (Ultraviolet and Visible Spectroscopy). The catalytic reduction reaction of thioflavin-T was monitored at room conditions using a UV-vis 3600 spectrophotometer. After studying the reusability performances of the prepared catalysts in the catalytic reduction of thioflavin-T, catalytic reactions were carried out at different temperatures and the activation parameters for the most effective nanocatalyst (Ea: Activation Energy; ΔH*: Activation Enthalpy; ΔS*: Activation Entropy) were calculated. Keywords: Copper; Dye removal; Nanocluster; Sulfonated reduced graphene oxide; Thioflavine-T
In this master's study, graphene oxide (GO) and its functionalized derivative, sulfonated reduced graphene oxide (rGO-SO3H), were synthesized in accordance with the literature. Subsequently, rGO-SO3H supported Cu, Ag and Au nanoclusters were prepared in-situ and their performances in catalytic reduction of thioflavin-T organic dyes in the presence of NaBH4 were investigated in aqueous medium. Finally, prepared reduced graphene oxide (rGO), sulfonated reduced graphene oxide (rGO-SO3H) and sulfonated reduced graphene oxide supported metal nanoclusters were characterized by using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer), XRD (X-Rays Diffraction), XPS (X-Ray Photoelectron Spectroscopy), TEM (Transmission Electron Microscope), TEM / EDX (Transmission Electron Microscope / Energy Dispersive X-Ray Spectroscopy), HRTEM (High Resolution Transmission Electron Spectroscopy), ATR-IR (Attenuated Total Reflactance-Infrared Spectroscopy), NMR (Nuclear Magnetic Resonance) and UV-vis (Ultraviolet and Visible Spectroscopy). The catalytic reduction reaction of thioflavin-T was monitored at room conditions using a UV-vis 3600 spectrophotometer. After studying the reusability performances of the prepared catalysts in the catalytic reduction of thioflavin-T, catalytic reactions were carried out at different temperatures and the activation parameters for the most effective nanocatalyst (Ea: Activation Energy; ΔH*: Activation Enthalpy; ΔS*: Activation Entropy) were calculated. Keywords: Copper; Dye removal; Nanocluster; Sulfonated reduced graphene oxide; Thioflavine-T
Description
Keywords
Kimya, Kimya Mühendisliği, Anorganik kimya, Fizikokimya, Organik boyar maddeler, Chemistry, Chemical Engineering, Inorganic chemistry, Physical chemistry, Organic dyestuffs
Turkish CoHE Thesis Center URL
WoS Q
Scopus Q
Source
Volume
Issue
Start Page
End Page
91