INORGANIC SYNTHESIS AND INDUSTRIAL
Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 9, pp. 1506−1510.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © V.V. Samonin, M.L. Podvyaznikov, E.A. Spiridonova, A.G. Golubev, I.V. Vlasov, 2011, published in Zhurnal Prikladnoi Khimii,
2011, Vol. 84, No. 9, pp. 1454−1458.
Variation of Sorption Properties
of Fullerene Black in Storage
V. V. Samonin, M. L. Podvyaznikov, E. A. Spiridonova,
A. G. Golubev, and I. V. Vlasov
St. Petersburg State Technological Institute, St. Petersburg, Russia
Received December 20, 2010
Abstract—Variation of sorption characteristics of fullerene black containing various amounts of fullerene with
the time and conditions of its storage was studied. The effect of a temperature treatment on the possibility of
restoration of its sorption activity was examined. A mechanism by which the sorption activity of fullerene black
varies with time was suggested.
Fullerene black (FB) is an intermediate product in
production of fullerite, the crystalline form of fullerene.
The main method presently used to synthesize fullerenes
is by burning of graphite electrodes in an electric arc
to give a fullerene black, with the subsequent stage-
by-stage recovery by extraction, chromatographic
separation, and thermal vacuum treatment to remove the
solvent from fullerite.
The PB structure can be schematically represented as
an inhomogeneous distribution of fullerene molecules
condensed as agglomerates in a carbon residue having
the form of a ruptured unsaturated carbon skeleton
resembling the graphene structure and amorphous
Depending on synthesis conditions, the content of
fullerenes in the black may be 4–20 wt %, of which
95–99% is C
fullerene, and the rest, C
The interest in FB as a sorbent is primarily due to
its high sorption parameters whose values compare well
with those of activated carbons and silica gels. Previous
studies have shown that the adsorption capacity of FB
for benzene from the gas phase reaches a value of 0.8–
, and the speciﬁ c surface area determined
by low-temperature adsorption of argon exceeds 300
in some cases. It is noteworthy that values of
these parameters widely vary between FB batches.
Because of the high cost of the material, resulting from
the gross expenditure for its synthesis, materials of this
kind can be used in narrowly specialized areas. For
example fullerene materials, such as FB and fullerite,
have a speciﬁ c property that consists in that the
sorption capacity of a material varies with illumination
conditions, which suggests that FB and fullerite can be
used to perform light-controlled sorption processes.
However, the main restriction to application of FB is
that its physicochemical properties, including sorption
parameters, vary with time.
There is published evidence that physical properties
of the black can be preserved if it is stored in the dark in an
inert atmosphere, e.g., in nitrogen, because illumination
leads to photopolymerization of fullerenes and oxygen
promotes redox reactions irreversible changing
properties of fullerenes . However, there have been
no reports about inﬂ uence exerted by processes of this
kind on sorption parameters of FB or fullerites.
The goal of our study was to examine how the
sorption activity of the black varies beginning from the
instant of its synthesis, determine the time interval in
which such a material becomes unsuitable for sorption
processes, and ﬁ nd promising ways to preserve the
sorption parameters of fullerene-containing materials in