Experimental investigation of concentration yields of liquid phase exfoliated graphene in organic solvent media

4th International Conference on Mechanical, Automotive and Aerospace Engineering

机械制造;航空航天工程;运输工程

Arifutzzaman, A.^1 ; Ismail, A.F.^2 ; Yaacob, I.I.^1 ; Alam, M.Z.^3 ; Khan, A.A.^1

Department of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University Malaysia, Malaysia^1

Department of Mechanical Engineering, Faculty of Engineering, International Islamic University Malaysia, Malaysia^2

Department of Biotechnology Engineering, Faculty of Engineering, International Islamic University Malaysia, Malaysia^3

关键词: Chemical processing;    Exfoliated graphene;    Experimental investigations;    Graphite flakes;    N ,N-Dimethylformamide;    N-methyl-2-pyrrolidone;    Organic solvent media;    UV-vis absorbance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/488/1/012001/pdf
DOI  :  10.1088/1757-899X/488/1/012001

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The main purpose of this work is to experimentally investigate the concentration yields of exfoliated Graphene in organic solvents with the variation of different centrifugation speeds (rpm). Graphene was effectively fabricated by one of the most convenient chemical processing approach liquid-phase exfoliation (LPE) of graphite in two different organic solvent N-Methyl-2-Pyrrolidone (NMP) and N, N-dimethylformamide (DMF). After exfoliation separated supernatant dispersions were preserved into the other tube as product. Similar procedure was repeated with same parameter and same graphite for both of the solvents. FESEM analyses of the exfoliated Graphene samples revealed the presence of few layers of Graphene flakes stacking. Analysis of the Raman spectrum of the samples it was revealed that the precursor graphite flakes was converted to Graphene sheets. Concentrations of graphene suspensions in both solvents were measured from separately prepared standard graphs using Beer's law with the aid of UV-vis absorbance spectroscopy. Estimated exfoliated graphene concentration was acquired higher for lower centrifugation (rpm) for both of the solvent. It was also seen that for the same rpm concentration of Graphene was higher in NMP than that of in DMF.