書誌事項
- タイトル別名
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- Chemical Adsorption of Al and Rh Ions on SiO2 in Aqueous Solutions.
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説明
Chemical adsorption of Al and Rh ions on SiO2 in aqueous solutions are examined. It is revealed that complex cations, such as [Al(H2O)6]3+, [Al(OH)(H2O)5]2+ and [Al(OH)2(H2O)4]+, are adsorbed on SiO2 in the pH range 4 to 9 and that the adsorption results in the shifts of values in zeta-potential up to ca. +60 mV. On the other hand, Rh ions, which are inert in the pH range, are not adsorbed on SiO2 and no substantial differences are observed between values of zeta-potentials in Rh solutions and those in metal-free solutions. In the pH range 10 to 12, however, it is observed that both Al and Rh ions are adsorptive on SiO2. In All Rh containing solutions, the values of zeta-potential are between -50 to -60 mV, which are about 10 mV smaller than those in metal-free solutions. Therefore, it is supposed that complex anions, such as [Al(OH)4(H2O)2]- and [Rh(OH)4(H2O)2]-, are adsorbed in the alkaline solutions. As for the mechanism, we propose that the adsorption proceeds through ligand-exchange reactions of hydrated Al/Rh ions.
収録刊行物
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- 表面科学
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表面科学 18 (8), 506-509, 1997
公益社団法人 日本表面科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681431774848
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- NII論文ID
- 130003683740
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- ISSN
- 18814743
- 03885321
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- 抄録ライセンスフラグ
- 使用不可