Exfoliation process of graphite via intercalation compounds with sulfuric acid

2004 ◽  
Vol 65 (2-3) ◽  
pp. 133-137 ◽  
Author(s):  
Michio Inagaki ◽  
Ryuichi Tashiro ◽  
Yu-iti Washino ◽  
Masahiro Toyoda
Keyword(s):  
Sulfuric Acid ◽  
Intercalation Compounds

Electrochemical Formation of Graphite‐Sulfuric Acid Intercalation Compounds on Carbon Fibers

1985 ◽  
Vol 132 (10) ◽  
pp. 2369-2372 ◽  
Author(s):  
Yasuhisa Maeda ◽  
Yasuo Okemoto ◽  
Michio Inagaki
Keyword(s):  
Sulfuric Acid ◽  
Carbon Fibers ◽  
Intercalation Compounds

The intercalation of bromine fluorosulfates into graphite

1983 ◽  
Vol 61 (12) ◽  
pp. 2638-2642 ◽  
Author(s):  
S. Karunanithy ◽  
F. Aubke
Keyword(s):  
Electrical Conductivity ◽  
Sulfuric Acid ◽  
Raman Spectra ◽  
Room Temperature ◽  
Chemical Species ◽  
Intercalation Compounds ◽  
X Ray ◽  
Compound C ◽  
Lattice Mode ◽  
Identity Period

The action of bromine(1)fluorosulfate on graphite has led to the synthesis of several novel intercalation compounds. The intercalation of bromine(1)fluorosulfate at room temperature results in a first stage compound, C12BrSO3F, while at higher temperatures (~110 °C) C20BrF(SO3F)2 forms instead. Oxidation of C12BrSO3F with S2O6F2 yields C16Br(SO3F)3 and this reaction can be reversed by reacting the latter with an excess of Br2.Graphite trifluoromethylsulfate C12SO3CF3 is formed in the solvolysis of C12BrSO3F with an excess of trifluoromethyl-sulfuric acid. First stage nature of these compounds has been confirmed by the X-ray identity period along C axis and [Formula: see text], vibrational lattice mode in the Raman spectra. The use of 19F nmr in identifying the chemical species in the inter-lamellar space has been demonstrated. The planar electrical conductivity of these compounds has been observed to be three to six times higher than that of graphite.

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