A further investigation on effect of basic media on the synthesis of MCM-41

摘要

Pure siliceous MCM-41 samples were synthesized in strong and weak alkaline media (sodium hydroxide and ethylenediamine). Different pH ranges for synthesis were obtained for different alkaline media. Ethylenediamine gave the samples higher structural order and stability, and allowed the use of a broader pH range that makes it easier to synthesize MCM-41 of good quality. The advantage of ethylenediamine may results from the increase of charge density on the surface of surfactant micelles owing to the penetration of conjugated acid cation of the organic base.