Bulky epoxides are industrially produced by organic synthesis in multistep procedures, generating significant amounts of waste products in the process. Efficient catalyst in combination with a simple oxidant (H₂O₂ or O₂) would significantly reduce the waste production. Four types of microporous titanosilicates with extra-large pores (Ti-UTL), and shortened diffusion pathways (L-TS, Ti-MCM-22, and Ti-SPP) were prepared and investigated in the epoxidation of cyclooctene with H₂O₂ and photocatalytic oxidation using O₂. Ti-UTL is a zeolite possessing 14−12-ring channel system. l-TS-1 and Ti-MCM-22 are composed of aggregates of titanosilicate nanosheets with the thickness of ca. 2 nm and hexagonal thin platelets, respectively. Ti-SPP is composed of olive-like aggregates with approximately length of 0.88–1.12 μm and width of 0.44−0.68 μm consisting of intergrown (self-pillared) nanosheets having 13−70 nm in size. In the epoxidation with H₂O₂ as an oxidant, Ti-MCM-22 showed the highest catalytic activity due to the wide interlayer space, which enhanced the accessibility of cyclooctene to active titanium site. While, in the photocatalytic epoxidation in the presence of O₂ instead of H₂O₂, Ti-UTL showed the highest activity. The incorporated germanium atoms, which is indispensable component for the construction of extra-large pores, may affect the electronic properties of active titanium species, leading to high photocatalytic activity.

大块环氧化物在工业上通过多步程序的有机合成生产，在此过程中产生大量废品。高效催化剂与简单氧化剂（H ₂ O ₂或O ₂）结合将显着减少废物产生。制备了四种具有超大孔 (Ti-UTL) 和缩短扩散路径的微孔钛硅酸盐 (L-TS、Ti-MCM-22 和 Ti-SPP) 并研究了环辛烯与 H ₂ O ₂的环氧化和使用O _{2 的}光催化氧化。Ti-UTL 是一种具有 14-12 环通道系统的沸石。升-TS-1 和 Ti-MCM-22 由钛硅酸盐纳米片的聚集体组成，厚度约为 分别为 2 nm 和六边形薄片。Ti-SPP 由长度约为 0.88–1.12 μm、宽度约为 0.44–0.68 μm 的橄榄状聚集体组成，由尺寸为 13–70 nm 的共生（自柱支撑）纳米片组成。在以 H ₂ O ₂为氧化剂的环氧化反应中，Ti-MCM-22 表现出最高的催化活性，因为层间距较宽，这增强了环辛烯对活性钛位点的可及性。而在 O ₂而不是 H ₂ O ₂存在下的光催化环氧化, Ti-UTL 显示出最高的活性。掺入的锗原子是构建超大孔不可或缺的成分，可能会影响活性钛物种的电子特性，从而导致高光催化活性。