THE ROLE OF THE BASIC SOURCE IN THE SYNTHESIS OF PURELY SILICEOUS MCM-41

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). thetmaoh 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.