کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10561451 | 969774 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Extraction of cationic surfactant templates from mesoporous materials by CH3OH-modified CO2 supercritical fluid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Extraction of cationic surfactant templates from mesoporous materials by CH3OH-modified CO2 supercritical fluid Extraction of cationic surfactant templates from mesoporous materials by CH3OH-modified CO2 supercritical fluid](/preview/png/10561451.png)
چکیده انگلیسی
Extraction of cationic surfactant templates from MCM-41, MCM-48, SBA-1 and SBA-3 has been conducted using CH3OH-modified CO2 supercritical fluid. The supercritical fluid extraction (SFE) has been integrated with thermogravimetry (TG), X-ray diffraction (XRD) and N2 adsorption-desorption to evaluate extraction efficiency and structural stability of mesoporous materials. Experiments of optimization indicate that the conditions of 90 bar, 85 °C, CH3OH/CO2 = 0.1/1.0 ml/min and 3 h are most suitable for the SFE of cationic templates. 76-95% of the cationic templates can be extracted from the mesoporous materials. XRD and N2 adsorption-desorption studies illustrate that SFE possesses some advantages over calcination in maintaining mesoporous uniformity and structural stability when used to remove templates. The impact of curing on mesoporous structure is also dealt with.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 66, Issue 4, 15 May 2005, Pages 943-951
Journal: Talanta - Volume 66, Issue 4, 15 May 2005, Pages 943-951
نویسندگان
L. Huang, S. Kawi, C. Poh, K. Hidajat, S.C. Ng,