| 氨基功能化SBA-15的直接合成及其对CO2的吸附性能研究 | |
| One-Pot Synthesis of Amino-Functionalized SBA-15 and Their CO2-Adsorption Properties | |
| 摘要: 通过直接法合成了氨基功能化SBA-15介孔材料。使用X-射线粉末衍射法(XRD)，N2吸-脱附，透射电子显微(TEM)等技术对氨基功能化材料进行了表征。实验结果表明：当反应原料中nAPTES/(nAPTES+nTEOS)≤0.20时，APTES功能化的材料都具有典型的介孔SBA-15结构；但当nAPTES/(nAPTES+nTEOS)≥0.225时，由于氨基对SBA-15结构的副作用导致SBA-15介孔结构坍塌。在氟离子辅助合成下可以获得高含量氨基(反应原料中nAPTES /(nAPTES+nTEOS)的比值为0.25)功能化的SBA-15材料，且此材料中的介孔孔径和BET比表面积都较大。CO2吸附结果表明，随着反应原料中APTES含量提高，所合成的材料对CO2的吸附量相应增加，同时在101 kPa和25 ℃下，通过氟离子辅助合成的材料对CO2的吸附量远远优于无氟离子辅助合成材料的。本研究还对后嫁接法和直接合成法获得氨基功能化SBA-15介孔材料的优缺点进行了讨论。 | |
| 关键词: SBA-15 直接合成 CO2吸附 APTES 氟离子 | |
| 基金项目: | |
| Abstract: Amino-functionalized SBA-15 mesoporous materials were synthesized by a one-pot strategy. The synthesized materials were characterized by different techniques such as XRD, N2 adsorption-desorption, and TEM. The results show that all the obtained materials have a typical meso-SBA-15 structure when the molar ratios of APTES to (APTES+TEOS) in the synthetic solutions are below 0.20, while the meso-structure could be collapsed when these ratios are more than 0.20 because of the adverse effect of amino groups on the formation of SBA-15. However, with the aid of fluoride ions, even at a molar ratio of APTES to (APTES+TEOS) of 0.25, the amino-functionalized SBA-15 mesoporous material with a larger pore size and a higher BET surface area could be synthesized. The results from CO2 adsorption on the synthesized amino-functionalized SBA-15 mesoporous materials show that under the same conditions the adsorbed amount of CO2 increases with increasing the APTES amount in the synthetic solution and the amino-functionalized SBA-15 mesoporous material synthesized with the aid of fluoride ions has a higher amount adsorbed for CO2 adsorption at 101 kPa and 25 ℃, compared to those prepared without introduction of fluoride ions. The advantage and disadvantage of grafting and one-pot synthesis strategies to obtain amino-functionalized SBA-15 mesoporous materials are also discussed in this study. | |
| Keywords: SBA-15 one-pot synthesis CO2 adsorption APTES fluoride ions | |
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| 郝仕油,肖 强,钟依均,朱伟东,杨 辉.氨基功能化SBA-15的直接合成及其对CO2的吸附性能研究[J].无机化学学报,2010,26(6):982-988. | |
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