Preparation of hierarchical MWW-type titanosilicate by interlayer silylation with dimeric silane
Preparation of hierarchical MWW-type titanosilicate by interlayer silylation with dimeric silane
复制标题
二聚硅烷层间硅烷化制备分级MWW型钛硅酸盐
DOI：
10.1016/j.micromeso.2013.09.041
复制
发表时间：
2014-05
影响因子：
5.2
通讯作者：
Peng Wu
中科院分区：
文献类型：
--
作者：
Hao Xu;Liyan Fu;Jin-gang Jiang;Mingyuan He;Peng Wu
通过预溶胀和硅烷化相结合构建了以二聚硅烷为柱的层间膨胀沸石结构。对MWW型硼硅酸盐的层状前驱体进行预溶胀过程，产生足够的层间空间来容纳具有相对较大分子尺寸的二聚硅烷分子。适量的二聚硅烷对于制备由单分子硅烷剂支撑的有序层间膨胀结构非常重要。二聚硅烷的层间膨胀 MWW 沸石的 d 间距达到 30.9 Å，大于传统的三维 (3D) MWW (25.0 Å) 以及单体硅烷支撑的硅烷化样品 (27.5 Å)。 Ti 阳离子同晶结合到由二聚硅烷支撑的层间膨胀 MWW 沸石中。所得钛硅酸盐在烯烃与过氧化氢的环氧化反应中具有很高的活性，特别是在环己烯的情况下。
An interlayer expanded zeolite structure with dimeric silane as the pillars was constructed by a combination of pre-swelling and silylation. The pre-swelling process was carried out on the lamellar precursor of MWW-type borosilicate, which created enough interlayer space for accommodating the dimeric silane molecules with a relatively large molecular dimension. An appropriate amount of dimeric silane was important to prepare an ordered interlayer expanded structure pillared by monomolecular silane agent. Thed-spacing of interlayer expanded MWW zeolite by dimeric silane reached 30.9 Å, which is larger than that of the conventional 3-dimentional (3D) MWW (25.0 Å) as well as the silylated sample pillared by monomeric silane (27.5 Å). Ti cations were isomorphously incorporated into the interlayer expanded MWW zeolite pillared by dimeric silane. The obtained titanosilicate was highly active in the epoxidation of alkenes with hydrogen peroxide, especially in the case of cyclohexene.
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影响因子：
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作者：
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