1. After centrifuging the prepared GO by Hummer's method,it was placed in the Aluminium foil for drying but instead may be it got reacted with the foil which turned it to black. Does it affect the GO? Plus it shows the solution to be acidic. Any method to solve this problem?
2. I also prepared a new sample. Unfortunately,the distilled water that I used was acidic. I think that affected the prepared GO. Any idea about it? Should I prepare a new sample or any method to remove the acidic part?
First, deionized water should be used before making GO, so water does not interfere with the preparation of GO. Then, after the preparation is completed, the obtained solution should be washed in a dialysis bag until the dialyzed water becomes neutral, and then the obtained GO is further dispersed and centrifuged.
Since GO contains acid functional groups (-COOH, -C=O), it's reaction with metal (Aluminum) sheet is obvious. An acid resistant glass container should be a better carrier and should resolve the issue of drying GO.
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