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: Contribution to journalArticle査読

16 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)112-116
ページ数5
ジャーナルJournal of Colloid And Interface Science
233
1
DOI
出版ステータス出版済み - 1 1 2001

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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