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Development of practical production methods of boron nitride nanotubes

Research Project

Project/Area Number 21K18858
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 27:Chemical engineering and related fields
Research InstitutionWaseda University

Principal Investigator

Noda Suguru  早稲田大学, 理工学術院, 教授 (50312997)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords窒化ホウ素ナノチューブ / 化学気相成長法 / 鋳型合成法 / 実用合成プロセス / ホウ素原料 / ナノ材料 / 鋳型合成
Outline of Research at the Start

窒化ホウ素ナノチューブ(BNNT)はカーボンナノチューブ(CNT)と同様の円筒状1次元ナノ材料である。BNNTは絶縁性で無色透明とCNTと反対の特徴を持ち、絶縁性部材を用いたデバイスの構想に欠かせない。BNNT合成では窒素源はNH3が有用だが、ホウ素源が難しい。本研究ではホウ素とホウ酸という安価で扱い易い原料を検討、短径長尺BNNTの基板上合成を深化、流動層法および浮遊触媒法によりBNNTを実用的に合成する。CNTとBNNTという耐熱性と柔軟性に優れた導電性と絶縁性の無機ナノチューブを揃え、高耐熱な電池や界面材料などへと繋げる。

Outline of Final Research Achievements

Boron nitride nanotubes (BNNTs) are insulating and colorless, opposite to carbon nanotubes (CNTs). Various devices combining both can be envisioned, but BNNTs are expensive. In this study, the synthesis of BNNTs using an inexpensive and easy-to-handle boron source was investigated. Using B2O2 vapor from the reaction of boron and water vapor and H3BO3 vapor from sublimation of boric acid or mist supply of its aqueous solution, BNNTs were synthesized by chemical vapor deposition (CVD) using ammonia nitrogen as source and metal nanoparticle as catalyst, but of poor quality and in low quantity. Then, the template synthesis was investigated using CNTs, which have become inexpensive. CNT films were coated with BN by impregnation with a boric acid solution and nitridation with ammonia, and BNNT films were obtained by combustion removal of the CNTs.

Academic Significance and Societal Importance of the Research Achievements

現状、BNNTは数千℃の高温で物理的手法により合成されており、1 gあたり数万円と非常に高価である。より実用的なCVD法も検討されているが、高価で扱いの難しいホウ素源を用い微量合成することが多い。安価で扱い安いホウ素とホウ酸を用いたホウ素源供給は実用上の価値が高い。また、2B(s)+2H2O(g)→B2O2(g)+2H2(g)の固-気反応による蒸気供給は、学術的にも意義がある。鋳型合成法は、量産と低コスト化の進んだCNTで予め所望の構造体を作り、BNコートとCNT除去によりBNNT構造体に変換する技術であり、透明エアロゾルフィルタや高耐熱性電池セパレータなどへの応用が期待される。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] Enhanced CO2-assisted growth of single-wall carbon nanotube arrays using Fe/AlO catalyst annealed without CO22021

    • Author(s)
      Li Mochen, Yasui Kotaro, Sugime Hisashi, Noda Suguru
    • Journal Title

      Carbon

      Volume: 185 Pages: 264-271

    • DOI

      10.1016/j.carbon.2021.09.031

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fluidized-bed production of 0.3?mm-long single-wall carbon nanotubes at 28% carbon yield with 0.1 mass% catalyst impurities using ethylene and carbon dioxide2021

    • Author(s)
      Li Mochen, Hachiya Soichiro, Chen Zhongming, Osawa Toshio, Sugime Hisashi, Noda Suguru
    • Journal Title

      Carbon

      Volume: 182 Pages: 23-31

    • DOI

      10.1016/j.carbon.2021.05.035

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Fabrication of self-supporting boron nitride nanotube thin film using carbon nanotube as a template2023

    • Author(s)
      〇Shiori Nakamura, Toshio Ohsawa, Suguru Noda
    • Organizer
      第64回フラーレン・ナノチューブ・グラフェン総合シンポジウム,2P-13
    • Related Report
      2022 Annual Research Report
  • [Presentation] ホウ酸をホウ素源に用いた窒化ホウ素ナノチューブの合成2023

    • Author(s)
      〇蛭子 蒼太,沢田 哲郎,杉目 恒志,大沢 利男,野田 優
    • Organizer
      化学工学会第88年会,PD357
    • Related Report
      2022 Annual Research Report
  • [Presentation] 固体ホウ素と水蒸気の反応による酸化ホウ素蒸気供給と窒化ホウ素ナノチューブの合成2022

    • Author(s)
      ○甲斐田 敬済,髙橋 宏夢,李 墨宸,杉目 恒志,大沢 利男,野田 優
    • Organizer
      化学工学会第87年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Synthesis of boron nitride nanotubes using solid boron, water vapor, and ammonia2021

    • Author(s)
      °Takazumi Kaida, Hiromu Takahashi, Toshio Osawa, Hisashi Sugime, and Suguru Noda
    • Organizer
      第61回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Synthesis of boron nitride nanotubes using mist of boric acid aqueous solution as a low-cost boron source2021

    • Author(s)
      °Sota Ebisu, Tetsuro Sawada, Toshio Osawa, Hisashi Sugime, and Suguru Noda
    • Organizer
      第61回フラーレン・ナノチューブ・グラフェン総合シンポジウム
    • Related Report
      2021 Research-status Report
  • [Remarks] 野田・花田研究室ホームページ

    • URL

      http://www.f.waseda.jp/noda/index-j.html

    • Related Report
      2022 Annual Research Report 2021 Research-status Report

URL: 

Published: 2021-07-13   Modified: 2024-01-30  

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