Praveena Raghav To increase the pH of graphene oxide after centrifuge and dialysis with water, you can gradually add a dilute solution of a base such as NaOH, KOH, or ammonium hydroxide while stirring the dispersion. Monitor the pH carefully to avoid overshooting and potential aggregation. Another option is to use a buffer solution at the desired pH to maintain stability.
Please refer this article Article Aqueous Colloidal Stability of Graphene Oxide and Chemically...
Praveena Raghav
- Gradually add a weak baselike sodium bicarbonate (NaHCO₃) or a strong base like sodium hydroxide (NaOH) to your graphene oxide solution. A few drops at a time, ensuring gentle mixing, can help raise the pH without causing significant damage to the graphene oxide structure.
- If using a strong base like NaOH, proceed with caution and monitor the pH closely to avoid excessive pH increase, which may affect the properties of GO.
- Ammonium hydroxide (NH₄OH) is a gentler base compared to NaOH and can be added to gradually increase the pH. Ammonia will raise the pH and can be easier to control, especially if you are looking for a moderate pH increase.
graphene oxide has no pH, you might mean the pH of the dispersion media. Ammonium hydroxide seems to be a better option as ammonia is volatile and maybe partly removed. Maybe an ion exchange resin may work.
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