Atomic-scale Structure of Ferric Oxyhydroxide Formed from Fe–Si Alloy in Aqueous Solutions Containing Different Salts

• Kwon Sang-Koo

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• Inoue Katsuya

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• Suzuki Shigeru

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• Saito Masatoshi

  School of Health Sciences, Faculty of Medicine, Niigata University

• Waseda Yoshio

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

書誌事項

タイトル別名

• Atomic-scale Structure of Ferric Oxyhydroxide Formed from Fe–Si Alloy in Aqueous Solutions Containing Different Salts

抄録

Quantitative X-ray structural analysis coupled with reverse Monte Carlo (RMC) simulation was performed for characterizing the atomic-scale structure of γ-FeOOH (lepidocrocite) particles. These particles were formed by dipping pure iron or Fe–2mass%Si alloy into aqueous solutions containing Na₂SO₄ or NaCl. The realistic atomic-scale structures of γ-FeOOH particles were estimated by fitting ordinary interference functions through the RMC simulation technique. The results revealed that the fundamental FeO₆ octahedral structural units and their linkages were distorted in the γ-FeOOH particles formed from the Fe–Si alloy. This distortion was considered to be caused by the incorporation of silicate species into these particles. Transmission electron microscopy and Fourier-transform infrared (FT-IR) spectroscopy were employed for observing the morphology of the particles and for characterizing their bonding structure, respectively. Further, the amount of γ-FeOOH particles formed was measured in order to investigate their formation processes. The changes in the pH and oxidation-reduction potential (ORP) of the solutions were monitored during the formation of γ-FeOOH particles. Inductively coupled plasma analyses were also performed for determining the amounts of iron and silicon in supernatant solutions. The results indicated that the formation process of γ-FeOOH particles in the solutions was influenced by the addition of silicon to iron.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 46 (8), 1210-1217, 2006

  一般社団法人 日本鉄鋼協会

キーワード

• ferric oxyhydroxide
• lepidocrocite
• X-ray diffraction
• atomic-scale structure

詳細情報

• CRID: 1390001206488737664
• NII論文ID: 10018425280
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.46.1210
• COI: 1:CAS:528:DC%2BD28Xpt1SnsLY%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/46/8/46_8_1210/_pdf
• 本文言語コード: en
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