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Novel synthesis method of diamond from carbon dioxide and water under ambient pressure by using molten salt electrolysis

Research Project

Project/Area Number 18K19130
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionKyoto University

Principal Investigator

Nohira Toshiyuki  京都大学, エネルギー理工学研究所, 教授 (00303876)

Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsダイヤモンド / 電解合成 / 溶融塩
Outline of Final Research Achievements

Generally, diamond is synthesized by high temperature and high pressure (HPHT) method or chemical vapor deposition (CVD) method. So far, there are no reports concerning the diamond synthesis from liquid phase under ambient pressure. In the present study, the author investigated the electrolytic synthesis of diamond from molten salt (liquid phase) under ambient pressure. As the result, the synthesis of diamond was confirmed by micro Raman spectroscopy. The author also obtained useful information concerning the optimal electrolysis condition for diamond synthesis. Finally, the author confirmed the possibility of using carbon dioxide and water as the raw materials for diamond.

Academic Significance and Societal Importance of the Research Achievements

これまで、ダイヤモンドは高圧高温合成法や気相合成法で合成されており、常圧液体からの合成例は知られていなかった。本研究では、液相である溶融塩を用いて常圧下でのダイヤモンド合成を達成しており、学術的に価値が高い。さらに、原料として二酸化炭素と水を用いる可能性も確認した。これは、新たな二酸化炭素固定法としての展開が期待できるため、社会的意義も大きい。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

All Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Electrochemical Synthsis of Diamond in Molten LiCl-KCl-K2CO3-KOH2019

    • Author(s)
      S. Maruyama, K. Yasuda, T. Nohira
    • Organizer
      2nd Nucleation & Growth Research Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 溶融LiCl-KCl-K2CO3-KOH系におけるダイヤモンド電解合成の温度依存性2019

    • Author(s)
      丸山誠悟,安田幸司,野平俊之
    • Organizer
      第51回溶融塩化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 溶融LiCl-KCl-K2CO3-KOH系におけるダイヤモンド電解合成に与える電位の影響2019

    • Author(s)
      丸山誠悟,安田幸司,野平俊之
    • Organizer
      2019年度第3回関西電気化学研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 溶融LiCl-KCl-K2CO3-KOH系におけるダイヤモンド電解合成2019

    • Author(s)
      丸山誠悟,安田幸司,野平俊之
    • Organizer
      電気化学会第86回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 溶融LiCl-KCl-K2CO3-KOH系におけるダイヤモンド電解合成の電解電位依存性2018

    • Author(s)
      丸山誠悟,安田幸司,野平俊之
    • Organizer
      第50回溶融塩化学討論会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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