after Graphene oxide preparation, i followed chemical exfoliation method. I used hydrazine hydrate as reducing agent. I got major peak along with that i got two theta: 20.856 (count was less, small hump peak observed).
Hi Shanmugapriya i G
Usually the main peak (002) of graphite is around 26 °, when you exfoliate it chemically to obtain graphene oxide (GO) the peak of the plane (002) shifts towards lower values in 2 theta ca. 10 °, this is due to the increase in the interplanar distance between the graphene sheets caused by the introduction of oxygenated groups attached in the basal plane, if after obtaining the GO you reduce it, due to the elimination of oxygenated groups the interplanar distance of the graphene sheets will decrease and consequently the displacement of the plane peak (002) towards higher values in 2 theta (eg your peak at 20.9 °).
Regards.
Typically the fundamental pinnacle (002) of graphite is around 26 °, when you shed it synthetically to get graphene oxide (GO) the pinnacle of the plane (002) shifts towards lower esteems in 2 theta ca. 10 °, this is because of the expansion in the interplanar distance between the graphene sheets brought about by the presentation of oxygenated bunches appended in the basal plane, if in the wake of acquiring the GO you lessen it, because of the disposal of oxygenated bunches the interplanar distance of the graphene sheets will diminish and therefore the relocation of the plane pinnacle (002) towards higher qualities in 2 theta (eg your top at 20.9 °).
Dear Madam,
Please see this my paper ..
It might be helpful to understand the peaks in Graphene and and graphite@PXRD
"A time efficient reduction strategy for bulk production of reduced graphene oxide using selenium powder as a reducing agent"
Hi
The small hump peak that you have observed at around 20 degrees is due to the partially reduced GO sheets. Try increasing the reaction time with hydrazine. When fully reduced, only a single broad peak will appear at around 25-26 degrees.
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