Karbon kuantum noktacıklar ile desteklenmiş nanopartiküllerin sentezi yapısal tanımlamaları ve farklı hidrojen kaynaklarından hidrojen üretimi için hidroliz tepkimelerindeki katalitik performanslarının ölçülmesi
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Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Siirt Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu tez çalışmasında üç farklı hidrojen kaynağından özgün bir şekilde üretilmiş karbon kuantum noktacık destekli homojen ve heterojen katalizör yapıları aracılığıyla hidrolizle hidrojen üretimi katalitik parametrelerinin incelenmesi amaçlanmıştır. Bunun için hidrotermal yöntemle iki organik bileşik kaynağından karbon kuantum noktacık sentezi sağlanmıştır. Bu noktacıklara kobalt, nikel ve rutenyum metalleri farklı şekillerde yüklenerek homojen ve heterojen katalizör yapıları (Co@CQDs, Ni@CQDs, Ru@CQDs ) sentezlenmiştir. Sentezlenen karbon kuantum noktacık ve katalizör yapıları; TEM, XRD, XPS, ICP-MS, EDX, BET ve UV ile tanımlanmıştır. Sentez ve tanılama işlemlerinden sonra her bir katalizör yapısının sodyum borhidrür, potasyum borhidrür, ve amonyak boran sulu çözeltilerinin katalitik hidrojen üretim performansı ölçülerek, tepkime kinetiği incelenmiştir. Tez çalışması kapsamında karbon kuantum noktacık destekli Co, Ni ve Ru metalleri bazlı monometalik 11 özgün katalizör yapısı sentezlenmiştir. Bu katalizörlerin üç farklı hidroliz kaynağı ile 30 hidroliz katalitik bozunma tepkimesi incelenmiştir. Katalizör çevrim frekansı (TOF) ve hidrojen üretim hızları hesaplamaları sonucunda çok yüksek değerlerde katalitik etki gösteren katalizör malzeme yapısının sentezlendiği anlaşılmıştır.
This study aims to investigate the catalytic parameters of hydrogen producted by hydrolysis method and carbon quantum dot supported homogeneous and heterogeneous catalyst structures that are uniquely produced from three different hydrogen sources. For this purpose, carbon quantum dot synthesis was carried out from two organic compound sources by hydrothermal method. Homogeneous and heterogeneous catalyst structures (Co@CQDs, Ni@CQDs, Ru@CQDs ) were synthesized by loading cobalt, nickel and ruthenium metals on these dots in different ways. The synthesized carbon quantum dot and catalyst structures were characterized by TEM, XRD, XPS, ICP-MS, EDX, BET and UV. Following synthesis and characterization processes, the catalytic hydrogen production performance of sodium borohydride, potassium borohydride, and ammonia borane aqueous solutions of each catalyst structure was measured and the reaction kinetics were investigated. Within the scope of the study, 11 unique monometallic catalyst structures based on Co, Ni and Ru metals and supported by carbon quantum dots were synthesized. With three different hydrolysis sources, 30 hydrolysis catalytic decomposition reactions of these catalysts were investigated. As a result of the calculations of the catalyst cycle frequency (TOF) and hydrogen production rates, it was concluded that the catalyst material structure, which showed catalytic effect at very high values, was synthesized.
This study aims to investigate the catalytic parameters of hydrogen producted by hydrolysis method and carbon quantum dot supported homogeneous and heterogeneous catalyst structures that are uniquely produced from three different hydrogen sources. For this purpose, carbon quantum dot synthesis was carried out from two organic compound sources by hydrothermal method. Homogeneous and heterogeneous catalyst structures (Co@CQDs, Ni@CQDs, Ru@CQDs ) were synthesized by loading cobalt, nickel and ruthenium metals on these dots in different ways. The synthesized carbon quantum dot and catalyst structures were characterized by TEM, XRD, XPS, ICP-MS, EDX, BET and UV. Following synthesis and characterization processes, the catalytic hydrogen production performance of sodium borohydride, potassium borohydride, and ammonia borane aqueous solutions of each catalyst structure was measured and the reaction kinetics were investigated. Within the scope of the study, 11 unique monometallic catalyst structures based on Co, Ni and Ru metals and supported by carbon quantum dots were synthesized. With three different hydrolysis sources, 30 hydrolysis catalytic decomposition reactions of these catalysts were investigated. As a result of the calculations of the catalyst cycle frequency (TOF) and hydrogen production rates, it was concluded that the catalyst material structure, which showed catalytic effect at very high values, was synthesized.
Açıklama
Fen Bilimleri Enstitüsü, Kimya Mühendisliği Ana Bilim Dalı, Kimya Mühendisliği Bilim Dalı
Anahtar Kelimeler
Kimya Mühendisliği, Chemical Engineering
