Graphene oxide synthesis from Hummer's method is well-known. How can I acid-functionalize commercially available monolayer or few-layer graphene? Can the same method be used? will it not be very harsh oxidation? Any publication on this? Plz let me know.
Hi Uma,
first of all what is the purpose of your funtionalisation of SingleLG or FewLG...and then after you funtionalise if the C/O ratio decreases, that itself would behave like graphene oxide, having said that if 10:0 becomes 8:2 there might be well established funtional groups...come to your question, hummers method is chemical exfoliation, which you dont require at first place, you just need mild acids for funtionalisation...
Graphene - or graphite oxide (GO) already has carboxyl and epoxy groups. So You can functionalize it further by reacting with amine, use typical conjugation methods for aromatic organic compounds - works .. If You already have a layer of graphite/graphene and want to form carboxylic acid group, oxidise it like organic compounds - potassium permanganate and sulphuric acid. Hummers method is nothing else but oxidising aromatic rings...
Dear Prof. Tomasz Ciach, Thank you very much for your response. This will certainly help in our work. I think exfoliation is not required in this method, if the graphens is already so. Simply oxidizing will do the functionalization. How will it affect the electronic structure of the graphene? Could u plz give some insight?
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