Uptake of Au(III) ions by aluminum hydroxide and their spontaneous reduction to elemental gold (Au(0))

Takushi Yokoyama, Yoko Matsukado, Akiko Uchida, Yoshinobu Motomura, Koichiro Watanabe, Eiji Izawa

研究成果: ジャーナルへの寄稿記事

16 引用 (Scopus)

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The behavior of AuCl4- ions during the formation of aluminum hydroxide at pH 6 was examined. With an increase in NaCl concentration, the content of gold taken up by aluminum hydroxide decreased, suggesting that chloro-hydroxy complexes of Au(III) ion were taken up due to the formation of Al-O-Au bonds. It was found unexpectedly that the Au(III) ions taken up were spontaneously reduced to elemental gold without addition of a specific reducing reagent and then colloidal gold particles were formed. The mechanisms for the uptake of Au(III) ions by aluminum hydroxide and for their spontaneous reduction are discussed.

元の言語英語
ページ(範囲)112-116
ページ数5
ジャーナルJournal of Colloid And Interface Science
233
発行部数1
DOI
出版物ステータス出版済み - 1 1 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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