書誌事項
- タイトル別名
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- Formation Mechanism of Spherical Mesoporous Silica Prepared Using Dodecylamine.
- ドデシルアミン オ モチイテ チョウセイ シタ キュウジョウ メソポーラスシリカ ノ セイセイ キコウ
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Formation mechanism of spherical mesoporous silica particles prepared using dodecylamine (DDA) as a template was investigated by measuring surface tension, conductivity, pH and concentration of silicic acid in the mixed solutions. Porous structure of spherical mesoporous silica was found for irregular structure by means of X-ray diffraction and scanning electron microscopy. The fomation of DDA micell in DDA-H2O-C2H5OH system was confirmed by the presence of inflection points for tension and conductivity curves at about 0.5 mmol/l of DDA concentration. When tetraethyl orthsilicate was added in the solution, the conductivity raised suddenly, stayed the same for a few minutes, and decreased steadily while the concentration of silicic acid decreased largely. In addition, the value of pH shifted from about 11 to 9.8 at the same time. From these results, the formation mechanism of spherical mesoporous silica is considered to be as follows; 1st step: cationization(DDAH+) of DDA; 2nd step: formation of DDA H+ micell; 3rd step: hydrolysis of TEOS and polymerization of silicic acid; 4th step: complexation of DDAH+ and polysilicic acid; 5th step: nucleation and growth of the mesoporous silica; and 6th step: reconfiguration and growth of the mesoporous silica particles.
収録刊行物
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- Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌)
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Journal of the Ceramic Society of Japan (日本セラミックス協会学術論文誌) 111 (1290), 104-109, 2003
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680226589952
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- NII論文ID
- 110002292452
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- NII書誌ID
- AN10040326
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- ISSN
- 18821022
- 09145400
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- NDL書誌ID
- 6433106
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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
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可