Experimental investigation of concentration yields of liquid phase exfoliated graphene in organic solvent media
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-pha...
| Main Authors: | , , , , |
|---|---|
| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
IOP Publishing Ltd
2019
|
| Subjects: | |
| Online Access: | http://irep.iium.edu.my/72438/ http://irep.iium.edu.my/72438/ http://irep.iium.edu.my/72438/ http://irep.iium.edu.my/72438/1/72438%20Experimental%20investigation%20of%20concentration.pdf http://irep.iium.edu.my/72438/2/72438%20Experimental%20investigation%20of%20concentration%20SCOPUS.pdf |
| Summary: | 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. |
|---|