STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING

doi:10.1088/1009-1963/10/5/313

中国物理B ›› 2001, Vol. 10 ›› Issue (5): 429-432.doi: 10.1088/1009-1963/10/5/313

STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING

王俊¹, 柳义¹, 董宝中¹, 李志宏², 巩雁军², 张晔², 吴东², 孙予罕²

(1)National Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China; (2)State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

收稿日期:2000-11-01 修回日期:2001-01-15 出版日期:2001-05-15 发布日期:2005-06-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.29625307 and 29973057), and the National Key Basic Research Special Foundation of China (G20000480).

STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING

Li Zhi-hong (李志宏)^a, Gong Yan-jun (巩雁军)^a, Zhang Ye (张晔)^a, Wu Dong (吴东)^a, Sun Yu-han (孙予罕)^a, Wang Jun (王俊)^b, Liu Yi (柳义)^b, Dong Bao-zhong (董宝中)^b

^a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; ^b National Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China

Received:2000-11-01 Revised:2001-01-15 Online:2001-05-15 Published:2005-06-12
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.29625307 and 29973057), and the National Key Basic Research Special Foundation of China (G20000480).

摘要/Abstract

摘要： Small angle X-ray scattering experiments have been performed to study the microstructure of mesoporous silica materials prepared by condensation of tetraethylorthosilicate using non-ionic alkylpolyethyleneoxide (AEO₉) and ionic cetyltrimethylammonium bromide (CTAB) surfactant as templates. It is the pores within the nanometre range that produce the main scattering. The scattering of the pure silica systems obey Porod's law. The scattering of the systems with templates remaining in the pores show positive deviations from Porod's law. This may be because the templates produce some additional scattering background and then make the scattering of pores distorted. The results show that the full removal of templates from the pores of the materials by Soxhlet extraction is very easy for AEO₉, but it is difficult for CTAB. The positive deviation correction is also performed.

Abstract: Small angle X-ray scattering experiments have been performed to study the microstructure of mesoporous silica materials prepared by condensation of tetraethylorthosilicate using non-ionic alkylpolyethyleneoxide (AEO₉) and ionic cetyltrimethylammonium bromide (CTAB) surfactant as templates. It is the pores within the nanometre range that produce the main scattering. The scattering of the pure silica systems obey Porod's law. The scattering of the systems with templates remaining in the pores show positive deviations from Porod's law. This may be because the templates produce some additional scattering background and then make the scattering of pores distorted. The results show that the full removal of templates from the pores of the materials by Soxhlet extraction is very easy for AEO₉, but it is difficult for CTAB. The positive deviation correction is also performed.

Key words: mesoporous silica, templates, small angle X-ray scattering

中图分类号: (Powders, porous materials)

61.43.Gt

78.70.Ck (X-ray scattering)

李志宏, 巩雁军, 张晔, 吴东, 孙予罕, 王俊, 柳义, 董宝中. STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING[J]. 中国物理B, 2001, 10(5): 429-432.

Li Zhi-hong (李志宏), Gong Yan-jun (巩雁军), Zhang Ye (张晔), Wu Dong (吴东), Sun Yu-han (孙予罕), Wang Jun (王俊), Liu Yi (柳义), Dong Bao-zhong (董宝中). STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING[J]. Chinese Physics, 2001, 10(5): 429-432.

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STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING

STUDY OF MESOPOROUS SILICA MATERIALS BY SMALL ANGLE X-RAY SCATTERING

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