XPS, XRF, XRD, EXAFS及びNMRによるNi-イオン交換KAlSiO₄中でのNi²⁺の存在状態のキャラクタリゼーション

• 岡田 清

  東京工業大学大学院理工学研究科材料工学専攻

• 根本 昌朗

  東京工業大学大学院理工学研究科材料工学専攻

• 亀島 欣一

  東京工業大学大学院理工学研究科材料工学専攻

• 松島 雄太

  東京工業大学応用セラミックス研究所

• MACKENZIE Kenneth J. D.

  New Zealand Institute for Industrial Research and Development

書誌事項

タイトル別名

• Characterization of the State of Ni2+ in Ni-Exchanged KAlSiO4 by XPS, XRF, XRD, EXAFS and NMR.
• Characterization of the State of Ni〔2+〕 in Ni-Exchanged KAISiO4 by XPS, XRF, XRD, EXAFS and NMR
• Characterization of the State of Ni 2 in Ni Exchanged KAISiO4 by XPS XRF XRD EXAFS and NMR

抄録

Imperfectly ordered KAlSiO₄ shows a greatly increased uptake of Ni²⁺ from solution which motivated this study of the state of Ni²⁺ in Ni-exchanged KAlSiO₄ using X-ray photo-electron spectroscopy (XPS), X-ray fluorescence (XRF), powder X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS) and solid state nuclear magnetic resonance spectroscopy (NMR). The imperfectly ordered KAlSiO₄ was synthesized by solid-state reaction of kaolinite with K₂CO₃ at 550°C for 24h. The Ni-exchanged KAlSiO₄ samples were obtained by treatment in a solution containing 10^-3-10^-1M NiCl₂ buffered with 0.5M NaCl at 60°C. Comparison of the surface and bulk chemical compositions analyzed by XPS and XRF indicated that the Ni²⁺ sorbed on the KAlSiO₄ is largely concentrated at the surface. The XRD pattern of the Ni-exchanged KAlSiO₄ showed weak broad peaks corresponding to a phase with a layered structure and a change in the halo pattern of the KAlSiO₄. EXAFS analysis confirmed the presence of a Ni-containing layered double hydroxide (LDH; Ni_1-yAl_y(OH)₂X_y⋅nH₂O) as indicated by the interatomic Ni-Ni distance and Ni coordination number. The ²⁹Si MAS NMR showed shift and peak splitting corresponding to an increase in the degree of polymerization of the SiO₄ tetrahedra forming the framework of the tridymite-type structure and the ²⁷Al MAS NMR showed an increase of six coordinated Al in the Ni-exchanged KAlSiO₄. It is concluded, from all these results, that the Ni²⁺ in Ni-exchanged KAlSiO₄ forms a Ni-Al LDH-like phase on the surface of the KAlSiO₄. This is considered to be the main reason for the higher Ni²⁺ uptake compared with various other cations adsorbed on imperfectly ordered KAlSiO₄.

収録刊行物

• Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)

  Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 108 (1263), 989-992, 2000

  公益社団法人 日本セラミックス協会

キーワード

• Imperfectly ordered KAlSiO₄
• Ni-exchanged KAlSiO₄
• Cation exchanger
• Characterization of Ni²⁺
• Environmental ceramics

詳細情報

• CRID: 1390001205249599616
• NII論文ID: 110002289943
• NII書誌ID: AN10040326
• DOI: 10.2109/jcersj.108.1263_989
• COI: 1:CAS:528:DC%2BD3MXisVKhsA%3D%3D
• ISSN: 18821022
• ISSN: 09145400
• ISSN: http://id.crossref.org/issn/09145400
• NDL書誌ID: 5542376
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5542376
• Web Site: http://www.jstage.jst.go.jp/article/jcersj1988/108/1263/108_1263_989/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可