My sample only partially graphitized, I hope that it will fully graphitized, or some high degree of graphitization.(the Raman specturm of my sample after High-temperature annealing)
Activated carbon can never become graphite, even at very high temperature. At least you would need extremely high pressure in addition to high temperature. But you would loose the porosity, so it would not be activated carbon anymore ! You can only partly "graphitise" using a catalyst such as nickel. "Graphitise" is a bit abusive word, as you'll get something looking like graphite but very locally, in very small areas. Never pure graphite, whose carbon layers are strictly parallel in ABAB (hexagonal) stacking. Again, doing this, you'll loose surface area for sure.
Alain
Heat treatment (HTT) will work only if your sample is graphitizable (i.e., to go through a liquid mesophase during HTT). If your sample is non-graphitizable, it will never become graphitic. See the link for the classical original article on this from Rosalind Franklin (Crystallite growth in graphitizing and non-graphitizing carbon )
In the case of non-graphitizable, you may have luck with the catalytic method from Mochida-sensei (Catalytic graphitization of non-graphitizable carbon by chromium and manganese oxides).
Regards,
http://130.14.81.99/ps/access/KRBBFY.pdf
http://www.sciencedirect.com/science/article/pii/0008622380900196
Activated carbon can never become graphite, even at very high temperature. At least you would need extremely high pressure in addition to high temperature. But you would loose the porosity, so it would not be activated carbon anymore ! You can only partly "graphitise" using a catalyst such as nickel. "Graphitise" is a bit abusive word, as you'll get something looking like graphite but very locally, in very small areas. Never pure graphite, whose carbon layers are strictly parallel in ABAB (hexagonal) stacking. Again, doing this, you'll loose surface area for sure.
Alain
Hi,
I think, its very useful to you. See the below link:
http://www.google.com/patents/US20120171564
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