Abstract: A convenient synthesis of mesoporous molecular sieve MCM-48 by hydrothermal method using nonionic surfactant p-Octyl polyethylene glycol phenyl ether and cationic surfactant cetyltrimethyl-ammoniun bromide as co-template is reported. In this approach, nonionic surfactant p-Octyl polyethylene glycol phenyl ether by strong van der Waals and hydrogen bonding can greatly lower the amount of cationic surfactant necessary to synthesize molecular sieve MCM-48, at the same time, the with introduction of nonionic surfactant to the mixed surfactants micelle more extensively cross-linked framework and therefore higher thermal stability and higher crystallinity MCM-48 mesoporous molecular sieves were obtained. The synthesis was conducted at a very low mass fraction of mixed surfactants (about 4.6％) and a very low molar ratio of total surfactants to silica (about 0.152:1). Several mesoporous molecular sieves could be prepared by simply adjusting the molar ratio of p-Octyl polyethylene glycol phenyl ether to cetyltrimethyl-ammoniun bromide within a certain range.

Key words: Mesoporous molecular sieve MCM-48, Hydrothermal method, Co-template, Nonionic surfactant