Can anyone suggest the correct procedure for the neutralization of graphene oxide. We also want to make sure that there is no effect on any further application. Suggest if a paper is available for this.
If you are talking about removing residual acids after oxidation of graphite, I use soxhlet extraction with water to avoid multiple centrifugations. Keep in mind that the pH of GO is slightly acidic because of its hydroxyls and carboxyls.
Do you mean the graphite oxide or graphene oxide?
In the first case, the acids are still present in the graphite interlayer after the oxidation process and they should be washed out.
Graphene oxide usually is formed in an aqueous suspension and you can adjust its pH in a simple way.
If you are talking about removing residual acids after oxidation of graphite, I use soxhlet extraction with water to avoid multiple centrifugations. Keep in mind that the pH of GO is slightly acidic because of its hydroxyls and carboxyls.
while reducing ph we washed many times n its very time consuming, it willl be better way with soxhlet extraction ,i will try it, thanks for your kind response... Michal and Zoe.
hop it will not effect the future application.
The purification of solid GO by Soxhlet extraction is good idea. After 8 h extraction with hot water we achieved the reduction of sulfur content in GO to 0.4 percent and after 16 h further reduction below quantification limit. It was accompanied by a slight decrease in oxidation degree (carbon content changed from about 50 to 55 percent). Final pH of GO slurry was 3.6.
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