Chemical Speciation Analysis for Amorphous Boron and Precipitated Boron Carbide in Sintered Boron-Added Carbon Nanotubes

• ISHIKURO Mikio

  Institute for Materials Research, Tohoku University

• SATO Yoshinori

  Graduate School of Environmental Studies, Tohoku University PRESTO, Japan Science and Technology Agency

• TOHJI Kazuyuki

  Graduate School of Environmental Studies, Tohoku University

• WAGATSUMA Kazuaki

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• カーボンナノチューブ‐ホウ素焼結体中に含まれる無定形ホウ素と炭化ホウ素の形態別分離定量
• カーボンナノチューブ-ホウ素焼結体中に含まれる無定形ホウ素と炭化ホウ素の形態別分離定量
• カーボンナノチューブ ホウソ ショウケツタイ チュウ ニ フクマレル ムテイケイ ホウソ ト タンカ ホウソ ノ ケイタイ ベツ ブンリ テイリョウ

Abstract

The separation method and the determination of amorphous boron and boron carbide in carbon nanotubes (CNTs) were investigated. The boron carbide was precipitated in the CNTs when they were sintered after adding amorphous boron. The carbon nanotubes and boron carbide were not dissolved, whereas the amorphous boron could be dissolved with 7 N nitric acid. After dissolving amorphous boron in CNTs with 7 N nitric acid, residual boron carbide and CNTs were separated by filtration with a membrane filter. The separated insoluble boron carbide and CNTs on the filter were fused with molten sodium carbonate in a platinum crucible. The concentrations of boron in the filtrate and the insoluble residue were determined by inductively coupled plasma-optical emission spectrometry. It was found that the amount of the precipitated boron carbide increased along with an increase in the addition amount of boron and the rise of the temperature. The amount of unreacted amorphous boron in the CNTs was only a little.

Journal

• BUNSEKI KAGAKU

  BUNSEKI KAGAKU 60 (10), 807-811, 2011

  The Japan Society for Analytical Chemistry

Keywords

• chemical speciation
• carbon nanotubes
• precipitated boron carbide
• amorphous boron

Details

• CRID: 1390282679638040576
• NII Article ID: 10029482363
• NII Book ID: AN00222633
• DOI: 10.2116/bunsekikagaku.60.807
• COI: 1:CAS:528:DC%2BC3MXhsValtrbF
• NDL BIB ID: 11273426
• ISSN: 05251931
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11273426
• Web Site: http://www.jstage.jst.go.jp/article/bunsekikagaku/60/10/60_10_807/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed