Soma Chakraborty, Jayanta Chattopadhyay, Wenhua Guo, and W. Edward Billups*
Angew. Chem. Int. Ed. 2007, 46, Early View published on May 3, 2007.
Point: C8K is a long-investigated material good for catalysis from potassium intercalation with graphite. Now C8K can be used as precursor to prepare soluble (exfoliated) graphenes.
Synthesis:
Organic-soluble:
Water-soluble:
Characterization:
Raman: Much increased D-band after functionalization.
TGA (Ar/10C/min/800C): 15% loss (one dodecyl per 78 graphite carbons)
FT-IR: C-H; C=O; N-H.
XPS: Presence of N.
TEM: Bumps on graphite surface = functionalities; 6-20 layers; ~100 nm in size (Tag: Can we see potassium?)
AFM: height (30%: 2-4 nm; 70%: 7-9 nm); size: 0.1-1.4 microns.
No comments:
Post a Comment