Journals / International Journal of Advances in Engineering and Pure Sciences / 2019 / Cilt: 31 - Sayı: 3

Oxidation of the Graphite and Carbon Black Obtained from Worn Out Waste Tires Using Improved Hummers Method

Grafit ve Ömrünü Tamamlamış Atık Lastikten Elde Edilen Karbon Siyahının İyileştirilmiş Hummers Yöntemi ile Oksidasyonu

Pages
238–244
Publication Date
2019-09-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These results show that carbon black has higher carbon content even if oxidized.

📌 3 Key Takeaways

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Objective & Hypothesis:Due to the high cost of graphite in the chemical synthesis of graphene oxide, studies on low-cost alternative carbon sources such as coal or carbon black have intensified.
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Key Findings & Data:When the Raman patterns are analysed, it was determined that carbon black obtained by pyrolysis from worn out waste tires has a more defective structure (ID / IG = 5.65) than nano-sized and high-purity carbon black (ID / IG = 2.66) and graphene oxide (ID / IG = 1.40).
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Conclusion & Impact:These results show that carbon black has higher carbon content even if oxidized.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:İyileştirilmiş Hummers Yöntemi · Grafen Oksit · Karbon Siyahı

Abstract

Due to the high cost of graphite in the chemical synthesis of graphene oxide, studies on low-cost alternative carbon sources such as coal or carbon black have intensified. In this study; oxidation of graphite and carbon black obtained by pyrolysis from worn out waste tires, was oxidized using the Improved Hummers method. The product properties - structural defect, carbon content, specific heat capacity of graphene oxide (GO) and oxidized carbon black (CBO) was determined and compared each other. When the Raman patterns are analysed, it was determined that carbon black obtained by pyrolysis from worn out waste tires has a more defective structure (ID / IG = 5.65) than nano-sized and high-purity carbon black (ID / IG = 2.66) and graphene oxide (ID / IG = 1.40). However, X-Ray Diffraction analyses showed that oxidized carbon black had higher regular graphene layer content than graphene oxide. While the atomic carbon content of oxidized carbon black was found as 83.10%, the atomic carbon content of graphene oxide was determined as 73.10%. These results show that carbon black has higher carbon content even if oxidized. One of the remarkable results in the study is the specific heat values of oxidized carbon based materials. All specific heat capacity values ​​of graphene oxide measured between -40 ° C and 50 ° C were found to be higher than the oxidized carbon black. In the improved Hummers method, it was concluded that the use of certain amounts of carbon black instead of graphite is necessary for the product properties not to be too far away from graphene oxide. In addition, it was concluded that oxidized carbon black should be compared with graphene oxide in terms of potential industrial applications such as water treatment and electronic applications.

Özet

Grafen oksidin kimyasal sentezinde grafitin yüksek maliyeti nedeni ile kömür veya karbon siyahı gibi düşük maliyetli alternatif karbon kaynakları üzerindeki çalışmalar yoğunlaşmıştır. Bu çalışmada, İyileştirilmiş Hummers yöntemi ile grafit ve ömrünü tamamlamış atık lastikten piroliz ile karbon siyahının oksidasyonu gerçekleştirilmiştir. Grafen oksit (GO) ve okside karbon siyahının (CBO) ürün özellikleri- yapısal kusurluluğu, karbon içeriği, özgül ısı kapasitesi- belirlenmiş ve kıyaslanmıştır. Raman desenleri ile yapılan analiz ile ömrünü tamamlamış atık lastikten piroliz ile elde edilen karbon siyahının, nano boyutta ve yüksek saflıkta karbon siyahına (ID/IG=2,66) ve grafen okside (ID/IG=1,40) karşın daha kusurlu bir yapıya sahip olduğu belirlenmiştir (ID/IG=5,65). Buna karşın X-Ray Saçılım analizleri ile okside karbon siyahının grafen tabakalarında düzeninin grafen okside göre daha yüksek olduğu gözlemlenmiştir. Okside karbon siyahının atomik karbon içeriği 83,1% iken grafen oksidin atomik karbon içeriği 73,0% olarak belirlenmiştir. Bu sonuçlar okside karbon siyahının daha yüksek karbon içeriğine sahip olduğu görülmektedir. Çalışmadaki dikkat çekici sonuçlardan biri okside edilen karbon tabanlı malzemelerin özgül ısı değerleridir. Grafen oksidin, -40°C ve 50°C arasında ölçülen tüm özgül ısı kapasitesi değerleri okside karbon siyahından yüksek olarak bulunmuştur. İyileştirilmiş Hummers yönteminde grafit yerine karbon siyahının belli miktarlarda kullanılmasının ürün özelliklerinin grafen oksitten çok uzaklaşmaması için gerekli olduğu sonucuna varılmıştır. Ayrıca, okside karbon siyahının grafen oksit ile su arıtma ve elektronik uygulamalar gibi potansiyel endüstriyel uygulamalar bakımından kıyaslanması gerektiği sonucuna varılmıştır.

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Cite This Article

ALP, R. B., DİLMAÇ, Ö. F., ŞİMŞEK, B. (2019). Oxidation of the Graphite and Carbon Black Obtained from Worn Out Waste Tires Using Improved Hummers Method. International Journal of Advances in Engineering and Pure Sciences, Cilt: 31 - Sayı: 3, 238–244. https://ajindex.com/articles/257959

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