ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 2, pp. 356−360. © Pleiades Publishing, Ltd., 2015.
Synthesis of Graphene Nanosheets via Chemical Reduction
of Graphite Oxide and Application in the Adsorption
, Wenlong Hou
, Qi Lian
, and Haixia Wu
College of Chemical Engineering, Hebei Normal University of Science and Technology,
Qin Huangdao City 066600, P. R. China
Analysis and Testing Center, Hebei Normal University of Science and Technology, Qin Huangdao City 066600, P. R. China
School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology,
Shi Jiazhuang City 050018, P. R. China
Received March 4, 2015
Abstract—In the paper graphene was prepared by redox method. The crucial factors affecting the synthesis of
graphite oxide was optimized by orthogonal experiment. The colloidal form of graphene was subsequently pre-
pared in the presence of hydrazine hydrate. The factors affecting reduction degree of graphene were discussed,
such as hydrazine hydrate dosage and reaction temperature in the system. The obtained grapheme is tested on
adsorption performances towards copper, cobalt and other inorganic ions.
* The text was submitted by the authors in English.
** The author for correspondence.
X-ray diffraction (XRD), Fourier transform infra-
red (FTIR) spectroscopy, Raman spectroscopy (RS),
Ultraviolet spectroscopy(UV) and scanning electron
microscopy (SEM), Transmission electron microscopy
(TEM) were used to characterize the graphite oxide
and graphene and analyse their thermal stability. The
experimental results indicate that the optimal conditions
for preparing graphite oxide with small structural defects
and complete intercalation were provided by increasing
the mesothermal reaction temperature, and the reduction
degree of graphene higher grows with increasing dosage
of hydrazine hydrate. Thermal analysis results indicate
that heat stability of graphene is much better than that of
graphite oxide. Results of copper and cobalt ions adsorp-
tion indicate that graphene is featured with enhanced
performances in respect of inorganic ions adsorption.
Since the industrial revolution, rapid developments in
industrialization, population expansion and urbanization
have largely contributed to the severe pollution to air,
water and soil. Water pollution is one of the major threats
because it has numbers of heavy metal ions. Adsorption
process is considered as a useful approach to control this
Graphene is a new type of crystal involving two-
dimensional atomic layer of carbon atoms by one single
atomic layer with sp
hybrid connection. The basic struc-
tural unit of graphene is the stable benzene ring structure
which is similar to the structure of the uncrimped carbon
nanotubes [1–4]. Graphene materials have a wide range
of applications in the ﬁ eld of nanoelectronics, micro-
electronics, energy storage materials due to their unique
physical structure, excellent mechanical characteristics
and electrical properties [5–9].
In this paper, graphene was prepared by deoxygenating
graphite oxide with hydrazine hydrate. Meanwhile, the
adsorption of copper ion and cobalt ion with graphene
Materials. Graphite power was supplied by Tianjin
Hengxin Chemical Preparation Co., Ltd. All chemicals
used in experiment were analytical and provided by
Tianjin sailboat Chemical Reagent Co., Ltd.
Graphite oxide (GO) was synthesized by oxidizing
natural ﬂ ake graphite powder using Hummers method.