Abstract
Two sets of titania containing MCM-48 and MCM-41 photocatalysts were prepared at room temperature. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM), nitrogen adsorption isotherms, UV–visible diffuse reflectance spectroscopy (DRS), and electron paramagnetic resonance (EPR) spectroscopy were utilized to characterize the Ti–MCM-48 and Ti–MCM-41 mesoporous materials. The photocatalytic hydrogen evolution results carried out under UV light irradiation indicated that the photocatalytic activity decreased with an increase of Ti loading in Ti–MCM-48 and Ti–MCM-41 samples. The photocatalytic activity was found to be dependent on the coordination of Ti and most importantly on the pore geometry, that is, cubic MCM-48 with interpenetrating network of pores exhibiting higher activity than uni-dimensional hexagonal pores in MCM-41.
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