High vacuum-dried MCM-41 (1g) was added to anhydrous toluene (80 mL) and bath sonicated to form a homogeneous mixture. Then, APTES (1mL) was added to the mixture and refluxed under N2 condition for 1 day with stirring. The mixture was centrifugated and thoroughly cleaned with toluene, hexane, and ethanol. Lastly, the product was vacuum-dried for 6 hours at 80 °C. Scheme 1. Synthesis of MCM-41