One-step synthesis of micro/mesoporous material templated by CTAB and imidazole ionic liquid in aqueous solution
One-step synthesis of micro/mesoporous material templated by CTAB and imidazole ionic liquid in aqueous solution
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DOI：
10.1016/j.micromeso.2010.12.011
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发表时间：
2011-06
影响因子：
5.2
通讯作者：
Jun Hu;F. Gao;Y. Shang;C. Peng;Honglai Liu;Ying Hu
中科院分区：
文献类型：
--
作者：
Jun Hu;F. Gao;Y. Shang;C. Peng;Honglai Liu;Ying Hu
以烷基咪唑离子液体[Cnmim]Br和表面活性剂十六烷基三乙基溴化铵（CTAB）为双模板剂，通过微相分离法合成了微孔/介孔硅酸盐材料。在室温下，阳离子[C4 mim]+和CTA+聚集成混合胶束，并作为共模板剂合成具有1719 m2 g −1的极大BET表面积的介孔材料。在373 K水热条件下，混合胶束分离为CTA+介观胶束和[C4 mim]+微米聚集体，分别作为介孔模板和微孔模板。总BET表面积为1016 m2 g-1，所得材料具有明显不同的孔径范围和中孔范围，分别为0.6和2.7nm。通过测定不同组成和温度下CTAB/[C4 mim]Br混合水溶液的临界胶束浓度（cmc），研究了CTAB与[C4 mim]Br之间的相互作用，初步阐明了其形成机理。
Based on the micro-phase separation of the dual templates consisting of an alkyl imidazole ionic liquid [Cnmim]Br and a surfactant cetyltriethylammonium bromide (CTAB), the micro/mesoporous silicate materials were synthesized. At room temperature, the cations [C4mim]+and CTA+aggregated into mixed micelles and acted as co-templates for synthesis of mesoporous materials which possessed an extremely large BET surface area of 1719m2g−1. While at a hydrothermal temperature of 373K, the mixed micelles separated into CTA+mesoscale micelles and [C4mim]+micro scale aggregates which were served as mesoporous templates and microporous templates, respectively. With a total BET surface area of 1016m2g−1, the resulted materials had distinctly different micropore range and mesopore range of pores of 0.6 and 2.7nm, respectively. The formation mechanism was tentatively elucidated by studying the interaction between CTAB and [C4mim]Br based on the measurement of the cmc of the CTAB/[C4mim]Br mixture aqueous solutions at different compositions and temperatures.