Wells-Dawson heteropoly acid encapsulated into the nanocages of SBA-16 as heterogeneous catalyst for the oxidation of olefins and alcohols

作者：Masteri Farahani M^*; Najafi Gh R; Modarres M; Taghvai Nakhjiri M

来源：Journal of Porous Materials, 2016, 23(1): 285-290.

DOI：10.1007/s10934-015-0080-0

• SBA-16
• Polyoxometalate
• Wells-Dawson
• Encapsulation
• Oxidation

Wells-Dawson type 18-tungstophosphoric acid (H6P2W18O62) as guest was encapsulated inside the nanocages of mesoporous SBA-16 host. The pore entrance of SBA-16 material was modified by silylating reagent to prevent the escape of encapsulated H6P2W18O62 from the nanocages. The prepared host-guest material was characterized by different physicochemical techniques. X-ray diffraction and transmission electron microscopy analyses indicated the retention of mesoporous structure of SBA-16 and well-dispersion of the H6P2W18O62 into the nanocages of SBA-16. The obtained material exhibited high catalytic activity, stability, and recyclability in the epoxidation of olefins and oxidation of alcohols in the presence of H2O2 as oxidant.

• 出版日期2016-2