Ersan HARPUTLU

Yüksek iletkenliğe sahip farklı üç boyutlu grafen hidrojellerin hazırlanması

Grafen tabakalarının üretim yöntemlerine bakıldığında hem kalite ve yüksek yüzey alanına sahip grafenin sentezlenmesi açısından Kimyasal Buhar Depolama (Chemical Vapor Deposition, CVD) tekniği en sık kullanılan yöntemlerin başında gelmektedir. Öte yandan, kimyasal yöntemler kullanılarak elde edilebilen grafen tabakalar büyük ölçeklerde ve düşük maliyetle hazırlanabilmektedir. Dolayısıyla grafit tabaklardan üç boyutlu grafen hidrojel yapılarını kimyasal olarak üretmek için tercih edilen ve günümüzde de hala oldukça yaygın bir şekilde kullanılan başlıca yöntem Hummer’s metodu ile elde edilen grafen oksit (GO) katmanların hidrotermal içerisinde grafen-hidrojelere (GH-H) dönüştürülmesidir. Çalışmanın amacı, farklı üç boyutlu grafen hidrojel yapılarının hidrotermal yöntemle hazırlanması ve boyutsal özelliklerinin incelenmesini içermektedir. Elde edilen ürünlerin uygulanan yöntem aşamalarına göre karakterizasyonları Ultraviyole ve görünür ışık absorpsiyon spektroskopisi (UV-Vis), Atomik Kuvvet Mikroskopu (AFM), X-Işını Kırınım (XRD) yöntemi, Alan Yayılımlı-Taramalı Elektron Mikroskobu (FE-SEM) ve Raman analizi kullanılarak yapılmıştır.

Anahtar Kelimeler:

Grafit, Grafen Oksit, Grafen Hidrojel

Preparation of high conductive different sizes of three dimensional graphene hydrogels

The production of graphene layers, both quality and high production cost, is obtained from Chemical Vapor Deposition (CVD) technique. On the other hand, graphene layers can be prepared using wet chemical methods on a large scale and at low cost. Therefore, the main method preferred for the chemical production of three-dimensional graphene hydrogel structures from graphite plates and still widely used today is the conversion of graphene oxide (GO) layers obtained by the Hummer's method to graphene hydrogel (GH-H) in hydrothermal. The aim of the study includes preparation of different three dimensional graphene hydrogel structures by hydrothermal method. Characterization of the products was made with the applied method steps, respectively; Ultraviolet and visible light absorption spectroscopy (UV-Vis), Atomic Force Microscope (AFM), X-Ray Diffraction (XRD), Field Emission-Scanning Electron Microscope (FE-SEM) and Raman analysis.

Keywords:

Graphite, Graphene oxide, Graphene hydrogel,

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