After the preparation of Graphene Oxide (GO), from modified Hummers method there are two recommended washing steps: (i) with HCl and (ii) then with de-ionised water. Is it advisable to make the PH to neutral by addition of base like NaOH instead of washing with de-ionised water several times to remove acid >???
Dear V S,
If do so, then you will have the difficulty of the washing of Na itself!
Because sodium has a great peak in FTIR and it shows sodium remain in you product and it will effect your grophene oxide.
I think that washing with deionised water is suitable to approach neutral pH sufficiency without affecting GO surface. Consecutive Washing/filtration or washing/centrifugation processes may be take a long time.
Dear Muhammad Xošqadam, the extra sodium , if present , can be removed through washing right
?
Dear Hassan Alshamsi, but I have washed through deionised water several times (i.e., 6 to 8 times), even then, the PH was around 3.5. this can't be used for cellular studies right??
Dear V S Sharan Rathnam,
As you know, the washig of graphene oxide is the most time-consuming process of the graphene oxide production. We do washing process in order to increase pH to neutral ph (around 6-6.5), however, by adding of NaOH, your process will be more time-consuming than the main process,I think.
We have produced GO by modified Hummers and washing of the product was done by de-ionised water 4 times and 2 times by Ethanol. The ph increased to 6 easily.
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