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Citation: Zhang Zhao-Rong, Suo Ji-Shuan, Zhang Xiao-Ming, Li Shu-Ben. Novel Methods for the Synthesis of MCM-41 Mesoporous Molecular Sieves and the Recovery of Template[J]. Acta Physico-Chimica Sinica, ;1999, 15(04): 333-337. doi: 10.3866/PKU.WHXB19990409 shu

Novel Methods for the Synthesis of MCM-41 Mesoporous Molecular Sieves and the Recovery of Template

1.
State Key Laboratory for Oxo Synthesis and slective oxidation,Lanzhou Institute of Chemical Physics,Academia Sinica,Lanzhou 730000

Received Date: 10 July 1998
Available Online: 15 April 1999

The effect of HCl content on the structural properties of the MCM-41 mesophase synthesized via the S+X-I+ assembly using cetylpyridinium bromide (CPBr) as the template and the tetraethylorthosilicate (TEOS) as silica source has been studied. It was found that with the decrease of TEOS/HCl ratio, the crystallinity, unit cell parameter and pore wall thickness of the MCM-41 silica increased, accompanied by the decrease in the mean pore size. While the efforts contributed to the template removal provided evidence that 100% of the CPBr encapsulated in the as-synthesized mesophase was recoverable by using acetone/water (1: 1 V/ V ) as the extractive agent. The mechanism for the formation of the titled mesophase, as well as the association of CPBr with the framework of the composite have also been discussed.
- MCM-41,
- Cetylpyridinium bromide,
- Synthesis,
- Template removal
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