以 3-丙胺基三乙氧基硅烷(APTES)为硅烷化试剂,分别采用后修饰法和一步嫁接法将其嫁接到SBA-15的孔内,形成了功能化的介孔分子筛用于CO2吸附. 利用X射线衍射和氮气物理吸附等方法考察了嫁接前后SBA-15的孔结构变化,用静态吸附天平考察了不同温度和不同分压下CO2的吸附行为. 实验结果表明,一步嫁接法比后修饰法更有利于实现APTES在SBA-15上的嫁接. 与传统的活性炭吸附剂相比,该种介孔分子筛更有利于较低分压下CO2的吸附脱除.
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