The role of the basic source in the synthesis of purely siliceous MCM-41

Abstract EN

In this present work, we studied the influence of the nature of the basic source on the structural and the textural of a mesoporous materials of type Si-MCM-41.

Three basics source were selected : NaOH, TEAOH and TMAOH.

These different bases were studied at various temperatures : 100, 130 and 150°C, for a duration of 48 hours by using the direct method.

The characterization of the obtained samples was made by powder X-ray diffraction (XRD), N2 sorption and scanning electron microscopy (SEM).

The TMAOH led to mesoporous materials MCM-41 whose properties are most interesting : good organization of the channels, high SBET and Vmeso and very regular pore size distribution centered at 40Å.

The analysis by N2-adsorption shows a reduction in the SBET when the temperature increases.

In addition, the morphology developed by textured materials at low temperature is different from that developed at high temperature.