TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
Search
Advanced search
OR
Browse
Search
Volume 2015, Issue 269
Displaying 1-6 of 6 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Integrated Paper
  • Structural analysis of carbon materials by X-ray photoelectron spectroscopy using computational chemistry
    Yasuhiro Yamada, Satoshi Sato
    Article type: Integrated Paper
    2015 Volume 2015 Issue 269 Pages 181-189
    Published: September 01, 2015
    Released on J-STAGE: October 01, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.181
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    X-ray photoelectron spectroscopy (XPS) has been frequently utilized to analyze the structures of carbon materials. However, few types of defects such as functional groups have been identified and reported, and some of these assignments are controversial. For example, the structures of oxygen-containing functional groups of carbon materials such as graphite oxide and graphene oxide are still under debate. Reported assignments for the C1s spectra of nitrogen-containing functional groups in carbon materials are few and there has been little discussion of such spectra. One effective method to clarify the structures of carbon materials in detail is simulation of XPS spectra using computational chemistry. This work explains the current problems for the XPS analysis of the C1s spectra of carbon materials and suggests the peak positions of various oxygen- and nitrogen-containing functional groups in addition to their full width at half maximum.
    View full abstract
    Download PDF (1877K)
Research Papers
  • Graphite nanoribbons prepared by the graphitization of poly(4-phthalimide) nanoribbons
    Akihiro Hachiya, Hiroyuki Fujimoto, Kanji Wakabayashi, Hiroaki Zaima, ...
    Article type: Research Paper
    2015 Volume 2015 Issue 269 Pages 190-194
    Published: September 01, 2015
    Released on J-STAGE: October 01, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.190
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Polyphthalimide nanoribbons (PPINRs) were prepared by the reaction-induced crystallization of monomers, 1-hexyl 4-aminophthalate and 2-hexyl 4-aminophthalate. These monomers were polymerized at 300∼360 °C in alkyl naphthalate oil. The PPINRs obtained were intricately intertwined aggregates of ribbons, and were highly crystalline. The PPINRs were carbonized and graphitized to yield graphite nanoribbons 200∼600 nm in width, which possessed the original PPINR skeleton structure.
    View full abstract
    Download PDF (2766K)
  • The contribution of surface metal complexes to the catalytic activity of carbon nanoshell particles in an amorphous carbon matrix for the oxygen reduction reaction
    Naokatsu Kannari, Kumi Narizuka, Jun-ichi Ozaki
    Article type: Research Paper
    2015 Volume 2015 Issue 269 Pages 195-200
    Published: September 01, 2015
    Released on J-STAGE: October 01, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.195
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A carbon material containing carbon nanoshell particles in an amorphous carbon matrix (CNS/C), has a catalytic activity for the oxygen reduction reaction (ORR). The nanoshells have diameters in the range 20∼50 nm, and are produced by the catalytic effect of a transition metal such as iron during carbonization. The activity of the CNS/C is believed to originate from defects located on the surface of the nanoshells. There still remains a possibility of surface metal complexes participating in the ORR. This study intended to clarify the influence of such types of active sites on the ORR activity of CNS/Cs. The materials were prepared by carbonizing a mixture of iron phthalocyanine and phenol-formaldehyde resin at 800 °C or 1000 °C followed by pulverization. Acid washing in a HCl solution of 1∼12 mol L-1 at room temperature or 70 °C for 2 h was repeated three times. The surface concentration of iron decreased to the detection limit of X-ray photoelectron spectroscopy. The ORR activity obtained in a H2SO4 solution was not influenced by the acid washing treatment. The results indicate a lower possibility of the participation of surface metal complexes than has been claimed for the catalytic activity of CNS/C in the ORR.
    View full abstract
    Download PDF (1542K)
Short Paper
  • The organic solvent extraction efficiency of activated carbon used in sampling tube products
    Hironobu Abiko
    Article type: Short Paper
    2015 Volume 2015 Issue 269 Pages 201-208
    Published: September 01, 2015
    Released on J-STAGE: October 01, 2015
    DOIhttps://doi.org/10.7209/tanso.2015.201
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Activated carbon is commonly used as a sampling agent in small glass tube products for the measurement of organic solvent vapor concentrations in the work environment as established by the Industrial Safety and Health Act in Japan. The extraction efficiency of adsorbed organic solvent vapor from the activated carbon significantly affects the measurement accuracy. We have investigated the properties of activated carbon used in typical Japanese sampling tube products, and the effects on the efficiency as determined by the phase equilibrium method. This study focused particularly on N2-BET specific surface area, grain diameter and the precursor materials of the activated carbon.
    View full abstract
    Download PDF (1317K)
Reports
TANSO Salon
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top