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Volume 2004 (2004)
- Issue 215 Pages 221-
- Issue 214 Pages 179-
- Issue 213 Pages 123-
- Issue 212 Pages 69-
- Issue 211 Pages 4-
Volume 2004, Issue 212
Displaying 1-5 of 5 articles from this issue
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Formation of the charcoal having acidic groups by carbonization of Sugi (Cryptomeria japonica) sapwood under oxygen-nitrogen atmosphereKazuhiro Sugamoto, Yoh-ichi Matsushita, Suguru Fujimoto, Takanao Matsu ...2004 Volume 2004 Issue 212 Pages 69-74
Published: April 01, 2004
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe sawdust of Sugi (Cryptomeria japonica) sapwood was carbonized at 300°C for 1h under oxygen-containing atmosphere such as 5%O2+95%N2, 10%O2+90%N2, or air. The charcoals carbonized under 10%O2+90%N2 and air had high capacity of adsorption for both NaOH and NaHCO3 in aqueous solution. The adsorption of NH3 gas on the charcoals also increased with an increase in oxygen concentration of the atmosphere. It is suggested that the acidic groups on the charcoals increased on the carbonization under oxygen-containing atmosphere. Increasing carboxyl groups on the charcoal prepared under air was confirmed by IR and 13C-NMR spectra.View full abstractDownload PDF (1068K) -
Takuya Hayashi2004 Volume 2004 Issue 212 Pages 75-80
Published: April 01, 2004
Released on J-STAGE: July 05, 2011
JOURNAL FREE ACCESSElectron energy loss spectroscopy (EELS) is known to be a powerful tool for the nanoscalc elemental analysis and understanding the bonding state of carbon materials. Since EELS instruments are highly computerized, we need to know how the software works to obtain a good spectrum. Post-processing of the spectra and spectrum simulation are also important for the better interpretation of the observed spectrum.
Here, we briefly introduce how the PCs are used in acquiring, analyzing, and simulating the electron energy loss spectra of carbon materials. For the help of the readers. we have indicated the software used upon each step of EELS analysis.View full abstractDownload PDF (10341K) -
Masahiro Yamamoto, Hironori Imamura2004 Volume 2004 Issue 212 Pages 81-90
Published: April 01, 2004
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFirst-principle calculations are the state-of-the-art theoretical method to explain the physico-chemical properties of solid and solid surface and owing to the predictability of the theory it gives us the guideline for the material design. In this article recent studies on the first-principles calculation of graphite intercalation compound are reviewd and our first-principles calculations on Li intercalation compunds are also shown. The calculation are in good agreement with the experimetal results reported. We also predict some results of the energy barrier for the intercaltion of Li to the stepped ghaphite surface.View full abstractDownload PDF (4631K) -
Tadanori Nomura, Kiyoshi Shimamura, Norikazu Miyashita2004 Volume 2004 Issue 212 Pages 91-98
Published: April 01, 2004
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSPVDC carbons are interested as a candidate of active carbon for EDLC electrodes or a storage material for methane or hydrogen, because of its has high bulk density and narrow distribution of nanopores. A nanocarbon was prepared from PVDC copolymer latex by alkaline-dehydrochlorination and subsequent pyrolysis. The latex in solids of 50% based on weight is commercially available. The aggregates of partially dehdrochlorinated latex in alkaline aqueous solution are was easily redispersed, filtered and rinsed. SEM images showed that the shape and the size of the particles of latex are substantially maintained; the nanoparticles in the latex, the precursors and the sintered material had almost same shape and size. TEM images showed that nanocarbons with hollow-like (core-shell) or onion-like structure are exhibited. The shell phase of the hollow-like carbon seemed to have high density. The onion-like carbon was considered to be partially graphitized.View full abstractDownload PDF (10661K) -
Fumitaka Watanabe, Isao Mochida2004 Volume 2004 Issue 212 Pages 99-105
Published: April 01, 2004
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSStructure and thermal characteristics of carbonized and graphitized foam derived from AR, which is commercial 100 % mesophase pitch, are reviewed. AR-Foam consists of soft-carboneous wall and uniform open pores with several hundred micrometers in diameter. The graphitized AR-Foam exhibited thermal conductivity per unit volume which is several times higher than that of metal foam. This unique foam is expected for applications as the thermal management material.View full abstractDownload PDF (11243K)
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