Graphitic Carbon Nitride Sio2 Composıte Assisted Metal Nanocumes: Synthesis, Identification and Catalytic Applicatıon of Ammonia Borane in Methanolysis Reaction
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2021
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Bu tez çalışmasında grafitik karbon nitrür (g-C3N4) ve silisyum dioksit (SiO2) kompozit destekli bakır(Cu), demir(Fe), nikel(Ni) nanoparcacıkları hazırlanmış ve amonyak-boran (AB) metanoliz tepkimesindeki fotokatalitik uygulamaları incelenmiştir. Hazırlanan foto katalitik malzemelerden en iyi etkinlik gösteren silisyum dioksit (SiO2) serbest grafitik karbon nitrür (g-C3N4) bakır nanokümeleri ile sağlanmıştır(Cu@g-C3N4). Cu@g-C3N4 foto katalizörünün tanımlanmasında P-XRD, XPS, DR-UV-vis, ICP-OES, SEM, SEM-EDX, TEM, FTIR gibi analizler ile gerçekleştirilmiştir. Bu analizlerden elde edilen sonuçlar bize g-C3N4 yüzeyinde iyi dağılım göstermiş ve ortalama parçacık boyutu 1.49 ± 0.35 nm olan foto katalitik malzemede bulutlaşmaya neden olduğu gözlenmektedir. Cu@g-C3N4 fotokatalizörü oda sıcaklığında (25 °C) AB'nin foto katalitik metanoliz tepkimesinde 163.36 sa-1 çevrim frekansı sağlanmıştır. Daha da önemlisi Cu@g-C3N4 malzemesinde bulunan Cu nanokümeleri topaklaşmaya ve sızmaya karşı dayanıklılık gösterip tekrar kullanılabilirlik sağlamaktadır. Anahtar kelimeler: Amonyak Boran, Hidrojen, Kataliz, Kompozit, Metanoliz
In this thesis graphitic carbon nitride (g-C3N4) and silicon dioxide (SiO2) Composite-supported copper(Cu), iron(Fe), nickel(Ni) nanoparticles have been prepared and ammonia-boranes (AB) methanolysis applications in the photocatalytic reaction were investigated. Silicon dioxide (SiO2) free graphitic carbon nitride (g-C3N4) copper nanocuments(Cu@g-C3N4) are provided with the best activity of the prepared photocatalytic materials. P-XRD, XPS, DR-UV-vis, ICP-OES, SEM, SEM-EDX, TEM, FTIR were used to identify the photocatalyst Cu@g-C3N4. The results from these analyses show us that g-C3N4 is well dispersed on the surface, causing turbidity in photocatalytic material with an average particle size of 1.49 ± 0.35 nm. Cu@g-C3N4 photocatalyst 163.36 h-1 cycle frequency is provided in photocatalytic methanolysis reaction of AB at room temperature (25 °C). More importantly, Cu@g-C3N4 Cu nanocuments are found in its material fracking and it is resistant to infiltration and provides reusability. Keywords: Ammonia Borane, Catalysis, Composite, Hydrogen, Methanolysis
In this thesis graphitic carbon nitride (g-C3N4) and silicon dioxide (SiO2) Composite-supported copper(Cu), iron(Fe), nickel(Ni) nanoparticles have been prepared and ammonia-boranes (AB) methanolysis applications in the photocatalytic reaction were investigated. Silicon dioxide (SiO2) free graphitic carbon nitride (g-C3N4) copper nanocuments(Cu@g-C3N4) are provided with the best activity of the prepared photocatalytic materials. P-XRD, XPS, DR-UV-vis, ICP-OES, SEM, SEM-EDX, TEM, FTIR were used to identify the photocatalyst Cu@g-C3N4. The results from these analyses show us that g-C3N4 is well dispersed on the surface, causing turbidity in photocatalytic material with an average particle size of 1.49 ± 0.35 nm. Cu@g-C3N4 photocatalyst 163.36 h-1 cycle frequency is provided in photocatalytic methanolysis reaction of AB at room temperature (25 °C). More importantly, Cu@g-C3N4 Cu nanocuments are found in its material fracking and it is resistant to infiltration and provides reusability. Keywords: Ammonia Borane, Catalysis, Composite, Hydrogen, Methanolysis
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Enerji, Kimya, Anorganik kimya, Katalitik hidrojenasyon, Yenilenebilir enerji, Energy, Chemistry, Inorganic chemistry, Catalytic hydrogenation, Renewable energy
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75