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Preparation of few-layer graphene by the hydroxylation of a potassium–graphite intercalation compound
CARBON
7 6 ( 2 0 1 4 ) 4 6 9 –4 7 0
Available at www.sciencedirect.com
ScienceDirect journal homepage: www.elsevier.com/locate/carbon
Tanso 262—Abstracts Preparation of activated carbon with high surface area using crab
agglomerated graphene in water yielded few-layer graphene. It
shell and shochu waste and the development of methane storage
was found that dropping small quantities of water onto KC8 is
technology
effective for achieving graphene with just a few layers.
Akihiro Yamashita, Yosuke Mori, Tatsuya Oshima, Yoshinari Baba
[TANSO 2014 (No. 262), 59–62.]
Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki, Japan
http://dx.doi.org/10.1016/j.carbon.2014.04.028
Low temperature pyrolysis of polyimide films in air Methane gas is an energy alternative to petroleum. However,
Koji
Tamadaa,
Takashi
Kobayashib,
Akihiko
the two conventional methods of storing methane gas, as
Tsutomu Takeichib, Rikio Yokotac, Jenq-Tain Lind
Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG),
a
involve a high degree of risk in terms of safety. To develop a high-safety and low-cost method of storing methane gas, we examined its adsorption on activated carbon newly prepared from biomass waste (crab shell and shochu waste) by chemical activation with K2CO3. The activated carbons prepared from the mixture of crab shell and shochu waste exhibited a maximum specific surface area of 3212 m2/g as measured by nitrogen gas
Matsumotob,
Department of Electrical Engineering, Tokyo National College of
Technology, Japan b
Department of Environmental and Life Sciences, Toyohashi University
of Technology, Japan c
Department of Space Structure and Materials, Institute of Space and
Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Japan d
adsorption, which is more than double that of commercially
Unimatec Co., Ltd, Japan
available activated carbon. The adsorption isotherms of methane
Carbon films were prepared from polyimide (PI) films by heat-
gas at 25 °C were measured using the new activated carbons and
treatment at low temperature in air. Porous pyrolyzed films were
the results revealed that their adsorption capacities for methane
obtained by maintaining the PI films at 500 560 °C for 10 min in
gas were particularly influenced by their micropore volume.
air. It was shown that heat-treatment in air is advantageous for
[TANSO 2014 (No. 262), 53–58.]
the production of porous films with low energy and low cost.
http://dx.doi.org/10.1016/j.carbon.2014.04.027
Furthermore, the pore size of the films was distributed between 1 nm and 6 nm, having not only micropores but also mesopores. This is very different from material produced by heat-treatment
Preparation of few-layer graphene by the hydroxylation of a
in nitrogen between 700 °C and 900 °C, where micropores are pre-
potassium–graphite intercalation compound
dominantly formed. It is expected that the porous films prepared
Takuya Wadaa,b, Takuya Yasutakea, Akira Nakasugab,
by the heat-treatment in air are useful for the adsorption of a wide
Taro Kinumotoa, Tomoki Tumuraa, Masahiro Toyodaa
range of molecules other than small molecules.
a
[TANSO 2014 (No. 262), 63–66.] Department of Applied Chemistry, Faculty of Engineering,
Oita University, Japan b
http://dx.doi.org/10.1016/j.carbon.2014.04.029
High Strength Polymer Laboratory, High Performance Plastics
Company, Sekisui Chemical Co., Ltd, Japan Thermodynamics adsorbents Few-layer graphene was prepared from the potassium–graphite intercalation compound (KC8) by hydroxylation. In an oxidative atmosphere, KC8 decomposes from its initial structural stage to a second or third stage. However, when KC8 was hydroxylated by dropping a small amount of water onto it in a nonoxidative atmosphere, the KC8 exfoliated with a disruption of the stage structure and agglomerated graphene was obtained. Sonication of this
http://dx.doi.org/10.1016/S0008-6223(14)00345-5
and
of
nano-porous
electrochemical
carbon
materials
double-layer
as
capacitor
electrodes—Implications from computer simulation studies— Kenji Kiyoharaa, Hiroshi Shioyamab, Kinji Asakaa a
Health Research Institute, National Institute of Advanced Industrial
Science and Technology (AIST), Japan b
Research Institute for Ubiquitous Energy Devices, National Institute of
Advanced Industrial Science and Technology (AIST), Japan
7 6 ( 2 0 1 4 ) 4 6 9 –4 7 0
Available at www.sciencedirect.com
ScienceDirect journal homepage: www.elsevier.com/locate/carbon
Tanso 262—Abstracts Preparation of activated carbon with high surface area using crab
agglomerated graphene in water yielded few-layer graphene. It
shell and shochu waste and the development of methane storage
was found that dropping small quantities of water onto KC8 is
technology
effective for achieving graphene with just a few layers.
Akihiro Yamashita, Yosuke Mori, Tatsuya Oshima, Yoshinari Baba
[TANSO 2014 (No. 262), 59–62.]
Department of Applied Chemistry, Faculty of Engineering, University of Miyazaki, Japan
http://dx.doi.org/10.1016/j.carbon.2014.04.028
Low temperature pyrolysis of polyimide films in air Methane gas is an energy alternative to petroleum. However,
Koji
Tamadaa,
Takashi
Kobayashib,
Akihiko
the two conventional methods of storing methane gas, as
Tsutomu Takeichib, Rikio Yokotac, Jenq-Tain Lind
Liquefied Natural Gas (LNG) and Compressed Natural Gas (CNG),
a
involve a high degree of risk in terms of safety. To develop a high-safety and low-cost method of storing methane gas, we examined its adsorption on activated carbon newly prepared from biomass waste (crab shell and shochu waste) by chemical activation with K2CO3. The activated carbons prepared from the mixture of crab shell and shochu waste exhibited a maximum specific surface area of 3212 m2/g as measured by nitrogen gas
Matsumotob,
Department of Electrical Engineering, Tokyo National College of
Technology, Japan b
Department of Environmental and Life Sciences, Toyohashi University
of Technology, Japan c
Department of Space Structure and Materials, Institute of Space and
Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Japan d
adsorption, which is more than double that of commercially
Unimatec Co., Ltd, Japan
available activated carbon. The adsorption isotherms of methane
Carbon films were prepared from polyimide (PI) films by heat-
gas at 25 °C were measured using the new activated carbons and
treatment at low temperature in air. Porous pyrolyzed films were
the results revealed that their adsorption capacities for methane
obtained by maintaining the PI films at 500 560 °C for 10 min in
gas were particularly influenced by their micropore volume.
air. It was shown that heat-treatment in air is advantageous for
[TANSO 2014 (No. 262), 53–58.]
the production of porous films with low energy and low cost.
http://dx.doi.org/10.1016/j.carbon.2014.04.027
Furthermore, the pore size of the films was distributed between 1 nm and 6 nm, having not only micropores but also mesopores. This is very different from material produced by heat-treatment
Preparation of few-layer graphene by the hydroxylation of a
in nitrogen between 700 °C and 900 °C, where micropores are pre-
potassium–graphite intercalation compound
dominantly formed. It is expected that the porous films prepared
Takuya Wadaa,b, Takuya Yasutakea, Akira Nakasugab,
by the heat-treatment in air are useful for the adsorption of a wide
Taro Kinumotoa, Tomoki Tumuraa, Masahiro Toyodaa
range of molecules other than small molecules.
a
[TANSO 2014 (No. 262), 63–66.] Department of Applied Chemistry, Faculty of Engineering,
Oita University, Japan b
http://dx.doi.org/10.1016/j.carbon.2014.04.029
High Strength Polymer Laboratory, High Performance Plastics
Company, Sekisui Chemical Co., Ltd, Japan Thermodynamics adsorbents Few-layer graphene was prepared from the potassium–graphite intercalation compound (KC8) by hydroxylation. In an oxidative atmosphere, KC8 decomposes from its initial structural stage to a second or third stage. However, when KC8 was hydroxylated by dropping a small amount of water onto it in a nonoxidative atmosphere, the KC8 exfoliated with a disruption of the stage structure and agglomerated graphene was obtained. Sonication of this
http://dx.doi.org/10.1016/S0008-6223(14)00345-5
and
of
nano-porous
electrochemical
carbon
materials
double-layer
as
capacitor
electrodes—Implications from computer simulation studies— Kenji Kiyoharaa, Hiroshi Shioyamab, Kinji Asakaa a
Health Research Institute, National Institute of Advanced Industrial
Science and Technology (AIST), Japan b
Research Institute for Ubiquitous Energy Devices, National Institute of
Advanced Industrial Science and Technology (AIST), Japan