please mention reference if any.while developing graphitic carbon nitride , if one wishes to functionalize it to reduce its band gap.
Old methods use strong acids (as nitric acid) to introduce carbonyl and alcoholic groups to the surface of the graphite.
There are other methods as thermal oxidation:
http://www.sciencedirect.com/science/article/pii/S0008622304006724
http://pubs.rsc.org/en/Content/ArticleLanding/2012/NJ/C2NJ20833D#!divAbstract
This maybe helpful for you:
http://www.diss.fu-berlin.de/diss/servlets/MCRFileNodeServlet/FUDISS_derivate_000000001299/05_Chapter5.pdf?hosts=
thankyou so much sir, sir i am intrested in carbon nitride and sir you have given references regarding graphite
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