Microwave synthesis of hydrophobic Ti-TUD-1 mesoporous silica for catalytic oxidation of cycloolefins
Microwave synthesis of hydrophobic Ti-TUD-1 mesoporous silica for catalytic oxidation of cycloolefins
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DOI：
10.1016/j.apcata.2014.02.008
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发表时间：
2014-04
影响因子：
5.5
通讯作者：
Sung-min Jeong;A. Burri;Nanzhe Jiang;Sang-Eon Park
中科院分区：
文献类型：
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作者：
Sung-min Jeong;A. Burri;Nanzhe Jiang;Sang-Eon Park
采用简单的微波法，以三乙醇胺（TEA）为模板剂和螯合剂，成功合成了负载不同量Ti的TUD型介孔二氧化硅（Ti- tud1）。微波加热可以加速膜的形成以及随后的水解和缩合过程，大大降低了时间成本。获得三维介孔结构，孔径分布窄（2 ~ 8 nm），比表面积高（700 ~ 1000 m2/g）。以四面体结构掺入的钛在环烯烃的液相氧化反应中表现活跃。此外，微波合成使ti - ud -1具有疏水性，这可能是由于与常规制备的催化剂相比，其催化活性有所提高。
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.