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论文类型：期刊论文

发表时间：2012-07-01

发表刊物：MATERIALS LETTERS

收录刊物：SCIE、EI

卷号：78

期号：,SI

页面范围：199-201

ISSN号：0167-577X

关键字：Sol-gel preparation; Porous materials; MCM-48; Mixed surfactant template; Cheap anionic co-template

摘要：Highly ordered mesoporous MCM-48 molecular sieve has been successfully synthesized using mixed surfactant of cationic cetyltrimethylammonium bromide (CTAB) and anionic sodium dodecyl sulfate (SDS) as templates at low surfactant-to-silica ratio (molar) of 0.177. Our work provides a commercially important approach to synthesize ordered mesoporous material by introducing cheap anionic surfactant SDS as co-template. The molar composition of surfactant mixture was CTAB: SDS=6.08. The characterization of the material shows that the pore diameter and BET surface area of as-prepared MCM-48 is 2.72 nm and 861.8 m(2) g(-1), respectively. The possible formation mechanism of MCM-48 using mixed surfactant template has been discussed according to Gibbs free energy theory and surfactant packing parameter theory. (c) 2012 Elsevier B.V. All rights reserved.