Figure 9
From: Study on the microcrystal cellulose and the derived 2D graphene and relative carbon materials
The XPS spectrums of bMCC (bamboo mcrocrystal cellulose), lignin, bMCC-derived carbon (bMCC-C), and lignin-derived carbon (lignin-C). (a) The XPS spectrum of carbon atoms in bMCC. The sub-peak centered on 285.2 nm is of the sp3 carbon atoms. (b) The XPS spectrum of carbon atoms in bMCC-C is in sp2 state (284.7 nm). Most carbon atoms change their electron state from sp3 in bMCC to sp2 in bMCC-C (graphene microcrystal, b-GMC) during carbonization reaction. (c) The XPS spectrum of carbon atoms in lignin. The sub-peak centered on 284.7 nm is of carbon atoms, where most carbon atoms are in sp2 state. (d) The XPS spectrum of carbon atoms in lignin-derived graphene microcrystal (l-GMC). Most carbon atoms keep their original electron states (sp3 or sp2) in lignin during carbonization reaction.
