So far literature data i have seen there is no peak in XRD for graphene. But recently i have received a graphene sample which shows same XRD pattern as graphite. So, is it not graphene?
Your sample is possibly "expanded graphite" having a worm-like or accordion-like structure but misleadingly identified as graphene or more-likely consisting of much thinner stacks than graphite. Fully exfoliated and disordered structure (like house-of-card) yields no peak in XRD. I suppose that you can obtain disordered structure by properly applying a physical or chemical forces onto your stacks.
Your sample is possibly "expanded graphite" having a worm-like or accordion-like structure but misleadingly identified as graphene or more-likely consisting of much thinner stacks than graphite. Fully exfoliated and disordered structure (like house-of-card) yields no peak in XRD. I suppose that you can obtain disordered structure by properly applying a physical or chemical forces onto your stacks.
Fully agreed with Prof Ali Durmus in this context. It is better to go for raman analysis of any carbon material for better understanding the nature of your graphene.
Your "graphene" can be a few-layers graphene, in fact, "few" meaning "many" in most of the cases !! So this is extremely thin graphite platelets, but definitely too thick to be called graphene, as leading to the same XRD and Raman spectra as bulk graphite. I agree that Raman will allow you to know what your sample really is.
Alain
RSC Adv., 2014,4, 15138-15145 you can have alook on this paper
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