XRD patterns of modified RH-MCM-41 with different silylation conditions and the parent RH-MCM-41 are presented in Fig. 2.
All modified RH-MCM-41 showed the main XRD peaks similar to that of the parent material indicating that texture of the initial material was not significantly altered.
However, the main reflection peak (2h * 2.4) intensity decreased with the addition of functional ligand indicating the decrease in crystallinity.
The absence or weakening of the 110 and 200 reflections indicated that some diffusion and any hexagonal structural order of the material did not extend over a long range.
This could be normally observed during modification of mesoporous materials.