A distinctive mesoporous titanium silicalite-1 (TS-1) was prepared by microwave-assisted postsynthetic treatment with H₂O₂ to generate hierarchical pore structure. For comparison, mesoporous TS-1 was also prepared with alkali or fluoride postsynthetic treatment. Synthesized catalysts were characterized by various techniques, namely, XRD, XPS, FTIR, UV–vis DRS, and others and evaluated for oxidation of cyclic olefins. The post-treated TS-1 with H₂O₂ and microwave irradiation exhibited a high catalytic activity in comparison to the parent TS-1. Both microwave irradiation time and temperature during postsynthetic treatment showed influence on the oxidation activity of the catalyst. The H₂O₂ coupled microwave irradiation generated mesoporosity in the microporous TS-1 crystals and improved its catalytic activity by the creation of external Ti species located on the TS-1 surface. Alkali or fluoride postsynthetic treated TS-1 catalysts also exhibited similar activity with that of H₂O₂ post-treated sample. In particular, the mesoporous TS-1 samples exhibited prominent shape selectivity in the oxidation of cyclododecene bulky molecule.

中文翻译：

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高性能微波合成介孔TS-1沸石对环烯烃的催化氧化

通过H ₂ O ₂的微波辅助后合成处理，制备出独特的介孔钛硅沸石-1（TS-1），以产生分级的孔结构。为了比较，也用碱或氟化物后合成处理制备了介孔TS-1。合成的催化剂通过多种技术进行了表征，即XRD，XPS，FTIR，UV-vis DRS等，并对环烯烃的氧化进行了评估。与母体TS-1相比，用H ₂ O ₂和微波辐射后处理的TS-1表现出高催化活性。合成后的微波辐射时间和温度均对催化剂的氧化活性产生影响。H ₂ O ₂偶合的微波辐射在微孔TS-1晶体中产生了介孔性，并通过在TS-1表面上形成外部Ti物种提高了其催化活性。碱或氟化物后合成处理的TS-1催化剂也表现出与H ₂ O ₂后处理样品相似的活性。特别地，中孔TS-1样品在环十二碳烯大分子的氧化中表现出突出的形状选择性。