氨基功能化SBA-15的直接合成及其对CO2的吸附性能研究

收稿日期：2009-12-21。收修改稿日期：2010-03-18。

国家重点基础研究发展计划项目-973计划前期研究专项(No.2009CB626607)资助。

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通讯联系人。E -mail ：weidongzhu@ ，yanghui@

第一作者：郝仕油，男，37岁，博士研究生，副教授；研究方向：多孔材料合成及其性能研究。

氨基功能化SBA -15的直接合成及其对CO 2的吸附性能研究

郝仕油1,2

肖

强2

钟依均2

朱伟东＊,2

杨

辉＊,1

(1浙江大学材料科学与工程学系，杭州

310027)

(2浙江师范大学物理化学研究所，先进催化材料省部共建教育部重点实验室，金华

321004)

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)，N 2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n APTES /(n APTES +n TEOS )≤0.20时，APTES 功能化的材料都具有典型的介孔SBA -15结构；但当n APTES /(n APTES +n TEOS )≥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n APTES /(n APTES +n TEOS )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。CO 2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CO 2的吸附量相应增加，同时在101kPa 和25℃下，通过氟离子辅助合成的材料对CO 2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；CO 2吸附；APTES ；氟离子中图分类号：O614.13；TF123.7

文献标识码：A

文章编号：1001-4861(2010)06-0982-07

One -Pot Synthesis of Amino -Functionalized SBA -15and Their CO 2-Adsorption Properties

HAO Shi -You 1,2XIAO Qiang 2ZHONG Yi -Jun 2ZHU Wei -Dong ＊,2YANG Hui ＊,1

(1Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027)

(2Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua,Zhejiang 321004)

Abstract:Amino -functionalized SBA -15mesoporous materials were synthesized by a one -pot strategy.The synthesized materials were characterized by different techniques such as XRD,N 2adsorption -desorption,and TEM.The results show that all the obtained materials have a typical meso -SBA -15structure 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 0.20because 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 -15mesoporous material with a larger pore size and a higher BET surface area could be synthesized.The results from CO 2adsorption on the synthesized amino -functionalized SBA -15mesoporous materials show that under the same conditions the adsorbed amount of CO 2increases with increasing the APTES amount in the synthetic solution and the amino -functionalized SBA -15mesoporous material synthesized with the aid of fluoride ions has a higher amount adsorbed for CO 2adsorption at 101kPa 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 -15mesoporous materials are also discussed in this study.

Key words:SBA -15;one -pot synthesis;CO 2adsorption;APTES;fluoride ions

第26卷第6期2010年6月

Vol ．26No ．6982-988

无机化学学报

CHINESE JOURNAL OF INORGANIC CHEMISTRY