[gilmotta (OP)]

Trying to make graphene by electrolysis method.
I connected the graphite bar to positive and the copper electrode to negative. Added purified water by osmosis method and added epsom salt. I applied 13.8VDC and the temperature rised feom 19 C to 34.5C and stayed at that temp for 24 hours.
I got something out of it but I am not sure it is graphene.
The liquid got black during the process and when I stopped the electrolysis the mass deposited on the bottom and the liquid was dark yellow color.
It does not pass electric current. I tested with a volt meter. So I am confused.
Have I found a way to remove the electric ability from the material?
What muddy material came from graphite?
Can i use copper and epsom salt for this?
I noticed that when dry the material has some resistance properties.

[evan_au]

I suspect that this is likely to produce a lot of small, randomly-sized molecules containing carbon. Even if it did produce graphene sheets, they would tend to crumple into balls.

You may be more successful with the sticky-tape method that won a Nobel prize...

And it's probably best to start with a piece of natural graphite which might have larger sheets of graphene than you would find in the processed graphite you find in a pencil or in the electrode of a carbon-zinc battery.

See: https://en.wikipedia.org/wiki/Graphene_production_techniques

[Gensanat]

I feel that you will definitely know this.