Removal of organic templates from mesoporous SBA-15 at room temperature using UV/dilute H2O2
Removal of organic templates from mesoporous SBA-15 at room temperature using UV/dilute H2O2
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DOI：
10.1016/j.micromeso.2006.07.019
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发表时间：
2006-11
影响因子：
5.2
通讯作者：
Li-ping Xiao;Jiyang Li;Hongxiao Jin;Da Xu
中科院分区：
文献类型：
--
作者：
Li-ping Xiao;Jiyang Li;Hongxiao Jin;Da Xu
发展了一种从介孔二氧化硅SBA-15中去除有机模板剂的新方法--UV/稀H_2O_2。该方法结合了紫外光照射和稀H_2O_2处理，允许在室温下3-4小时内完全去除有机模板。考察了pH值和双氧水初始浓度两个重要因素对脱模剂脱除效果的影响，寻找最佳脱模剂条件。采用粉末X射线衍射(XRD)、热重分析(TGA)、傅立叶变换红外光谱(FT-IR)、固体~(29)Si核磁共振谱(~(29)Si)和氮气吸附等手段，对UV/稀H_2O_2法处理的样品进行了详细的表征。经UV/稀H_2O_2处理后的产物具有良好的结构和良好的孔道质量。本研究提供了一种在室温下从介孔材料中去除模板的简便、廉价、温和和实用的方法。
A new UV/dilute H2O2method has been developed to remove organic templates from mesoporous silica SBA-15. This method combines UV irradiation and dilute H2O2treatment, allowing complete removal of the organic templates in 3–4h at room temperature. Effects of two important factors, pH value and initial H2O2concentration, have been investigated to search for the optimum condition of template removal. Detailed characterizations of the samples treated by UV/dilute H2O2method in comparison with other methods are performed with the aid of powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), solid-state29Si NMR spectra and nitrogen adsorption. The final product resulted from UV/dilute H2O2treatment has well-defined structure with perfect pore quality. This study provides an easy, cheap, mild and useful method for template removal from mesoporous materials at room temperature.