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Synthesis of Carbon Nitride and its incompressibility

Research Project

Project/Area Number 24656021
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Applied materials science/Crystal engineering
Research InstitutionOkayama University of Science

Principal Investigator

TAKARABE Kenichi  岡山理科大学, 理学部, 教授 (50122388)

Project Period (FY) 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords新機能材料 / 窒化炭素 / ナノ粒子 / 高圧合成
Research Abstract

The purpose of this research program was to synthesis the carbon nitride C3N4 predicted to be harder than diamond within one year. To reach the goal of this research, the research strategy was in the way that 1)the synthesis of H and O free C3N4 nanoparticle, 2) then subjecting that to high-temperature and high-pressure to transform the nanoparticle into the superhard C3N4. The understanding of the crystal structure of non H and O free C3N4HxOy nanoparticle was progressed, which was the starting point of this research program. It is the nano and amorphous particle which consists of an extended layer with a heptazine unit. In C3N4HxOy nanoparticle some nitrogen is terminated by hydrogen, which inhibits to complete the extended layer. The oxygen bonds to the carbon as an epoxy structure or other forms. By subjecting this C3N4HxOy nanoparticle, at the certain high-temperature and high-pressure(for example, about 1700K and 40 GPa) the new carbon-nitride C3N2(CH2) crystal was surely synthesized. The C3N2(CH2) crystal consists of the tetrahedral unit with the C-N single bond and the bridging bond with the terminating hydrogen. The C-N single bond has the compressibility as same as that of diamond revealed by the high-pressure x-ray diffraction study under pressure. This result is important for us that we pursue the superhard material relying on the strength of theC-N single bond. We optimized the synthesis process of carbon nitride nanoparticle and the C3N4Hx nanoparticle with almost O-free is synthesized. But we need some more study to synthesize the C3N4 nanoparticles without H and O.

Report

(2 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (9 results)

All 2013 2012

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (6 results) (of which Invited: 2 results)

  • [Journal Article] Bulk modulus and structural changes of carbon nitride C2N2(CH2) under pressure: The strength of C–N single bond2013

    • Author(s)
      M. Sougawa, K. Takarabe, Y. Mori, T. Okada, T. Yagi, H. Kariyazaki, K. Sueoka
    • Journal Title

      Journal of Applied Physics

      Volume: 113 Issue: 5 Pages: 1-5

    • DOI

      10.1063/1.4789020

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Electronic Structure of C2NX(X=O, NH,CH222):Wide Band Gap Semiconductors2012

    • Author(s)
      Kenichi Takarabe, Masaya Sougawa,Hiroaki Kariyazaki, and Koji Sueok
    • Journal Title

      Journal of Applied Physics

      Volume: 112 Issue: 1 Pages: 135731-6

    • DOI

      10.1063/1.4731749

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article]2012

    • Author(s)
      M Sougawa, T Sumiya, K Takarabe, Y Mori, T Okada, H Gotou, T Yagi, D Yamazaki, N Tomioka, T Katsura, H Kariyazaki, K Sueoka and S. Kunitsugu
    • Journal Title

      Journal of Physics:Conference Series

      Volume: 377 Pages: 011001-011001

    • DOI

      10.1088/1742-6596/377/1/011001

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Presentation] Carbon nitride Diversity2013

    • Author(s)
      K.Takarabe
    • Organizer
      Materials at Extreme Conditions
    • Place of Presentation
      Celebrity reflection(Florida, USA)
    • Related Report
      2012 Final Research Report
  • [Presentation] Carbon Nitride Diversity2013

    • Author(s)
      K.Takarabe
    • Organizer
      Study of Materials at Extreme Conditions 2013
    • Place of Presentation
      Celebrity Reflection, Florida, USA
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Study on C-N-H-O system near the composistion of C3NHxOy andC2N2X(X=O, NH, CH24) under pressure2012

    • Author(s)
      K.Takarabe
    • Organizer
      The joint 6th Asian Conference for High Pressure Research and International Forum on High Pressure Sciences
    • Place of Presentation
      中国物理研究院(北京、中国)
    • Related Report
      2012 Final Research Report
  • [Presentation] Study on C-N-H-O system near the composistion of C3N4HxOy and C2N2X(X=O, NH, CH2) under pressure2012

    • Author(s)
      K.Takarabe
    • Organizer
      The joint 6th Asian Conference for High Pressure Research and International Forum on High Pressure Sciences
    • Place of Presentation
      中国物理研究院、北京、中国
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Synthesis, structural analysis, and structural change under pressure of a new Carbon-Nitride C2N2(CH2)2012

    • Author(s)
      M.Sougawa
    • Organizer
      6th International Workshop on Spinel Nitrides and Related Materials in Conjunction with the Marie Curie ITN 7th Framework Programme FUNEA
    • Place of Presentation
      Ruedesheim, Rhine, Germany
    • Related Report
      2012 Annual Research Report
  • [Presentation] Is the C-N bond strong ?, from the lesson of the structural change of new Carbon Nitride C2N2(CH2)2012

    • Author(s)
      M.Sougawa
    • Organizer
      50th European High pressure Group Meeting
    • Place of Presentation
      Thessaloniki, Greece
    • Related Report
      2012 Annual Research Report

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Published: 2013-05-31   Modified: 2019-07-29  

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