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In this work, a series of tin containing mesoporous silicas (Sn/MCM-41 and Sn/SBA-15) were prepared by a one-pot hydrothermal method and their physical and chemical properties were characterized by various techniques such as powder X-ray diffraction, nitrogen adsorption-desorption and transmission electron microscopy. Among these catalysts, Sn/SBA-15(50) exhibited the highest catalytic activity for Baeyer-Villiger oxidation of cyclohexanone to e-crolactone using hydrogen peroxide (H 2 O 2 ) as the green oxidant. The best methodology was to carry out the reaction in 1,4-dioxane under 10 wt% Sn/ SBA-15 catalyst of 0.1 mol cyclohexanone at 70°C for 4 h, and a molar ratio cyclohexanone: oxidant of 1:3. Furthermore, this heterogeneous mesoporous Sn/SBA-15 catalyst was reusable without any appreciable loss in activity and selectivity after three cycles.

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