摘要
以正硅酸乙酯为硅源,非离子型表面活性剂聚乙二醇辛基苯基醚和阳离子型表面活性剂十六烷基三甲基溴化铵为共模板水热法合成了纯硅MCM-48分子筛。利用范德华力和氢键,聚乙二醇辛基苯基醚不仅可降低合成MCM-48所需阳离子表面活性剂的用量,而且有利于制备有序性好和稳定性高的MCM-48;并与单一阳离子表面活性剂制备的MCM-48的稳定性进行比较。
Pure silica molecular sieves MCM 48 were synthesized by hydrothermal method using mixed natural p octyl polyethylene glycol phenyl ether (OP) and cationic cetyltrimethyl ammonium bromide (CTAB) as structure directing agent and tetraethylorthosicilate (TEOS) as silica source. In this method, nonionic surfactant OP utilizing strong van der waals and hydrogen bonding can greatly reduce the amount of cationic surfactant necessary to synthesize MCM 48, at the same time, due to introduction of the nonionic surfactant into the system MCM 48 molecular sieves with more extensively cross linked framework and therefore higher thermal and hydrothermal stability and higher crystallinity were obtained. Several mesoporous molecular sieves could be prepared by simply adjusting the molar ratios of OP to CTAB within a certain range.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2002年第11期1081-1085,共5页
Chinese Journal of Inorganic Chemistry
基金
国家重点基础研究专项经费资助项目(No.2000048001)
国家自然科学基金资助项目(No.29973057)。
