Microwave synthesis of hydrophobic Ti-TUD-1 mesoporous silica for catalytic oxidation of cycloolefins

• Ti TUD-1 was synthesized in shorter time using microwave heating.
• Three dimensional mesopore structures were obtained with narrowed pore size distribution and high surface area (>700 m2/g).
• Controlling the hydrophobic properties of Ti-TUD-1 by microwave improves catalytic activity.
• Improved catalytic activity in cycloolefin oxidation reaction.

A simple microwave method was successfully adopted for the synthesis of various amount of Ti loaded TUD type mesoporous silica (Ti-TUD-1) using triethanolamine (TEA) as both templating and chelating agent. The time-cost was reduced dramatically due to the microwave heating which could accelerate the atrane formation as well as their following hydrolysis and condensation steps. Three dimensional mesopore structures were obtained with narrowed pore size distribution (2–8 nm) and high surface area (700–1000 m2/g). Ti species incorporated as tetrahedral structure were active in the liquid phase oxidation of cycloolefins. Further, microwave synthesis brought the hydrophobic nature to Ti-TUD-1 which could be attributed to the improved catalytic activity compared to conventionally prepared catalysts.

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