Synthesis of photocatalytic material of Al-MCM-41 containg titanium and its application for conversion of dibenzothiophene from model fuel
Abstract
Mesoporous TiO2/MCM-41 nanocomposites were synthesized successfully by combining the sol-gel method and hydrothermal treatment, using titanium isopropoxide (TTIP) and Di Linh bentonite as precursors of Ti and Si, respectively. The synthesized materials were well characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), UV-visible diffuse reflectance spectroscopy (UV-Vis/DRS). The photocatalytic activity was evaluated by the photodegradation of dibenzothiophene (DBT) under both UV. TiO2/MCM-41 catalyst exhibited high catalytic activity for the oxidative desulfurization (ODS) of DBT reaching 89.16% conversions at 70 °C after 5 h under UV. The significant enhanced degradation of DBT over TiO2/Al-MCM-41 might be due to the synergy effects of high surface area of Al-MCM-41, well-distributed TiO2 anatase, and reduced electron-hole recombination rates due to the dispersion of Al-MCM-41.
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