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
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.
Received: 01 November 2000
Revised: 15 January 2001
Accepted manuscript online:
Fund: 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).
Cite this article:
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 2001 Chinese Physics 10 429
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