疏水性杂化分子筛的控制合成及催化应用

以乙基三乙氧基硅烷和甲基三乙氧基硅烷为有机硅源, 分别通过转动和静态干胶转化法一步合成出乙基和甲基功能化杂化分子筛并对其进行了表征. 通过对合成路线、 有机基团碳链长度、 凝胶配比等的调变, 实现了对杂化分子筛疏水性的有效调控, 合成出水接触角为124°的疏水性杂化分子筛. 以疏水性杂化分子筛为载体制备的Ru负载催化剂在催化苯酚加氢反应中表现出优异的催化性能, 这归因于疏水/亲油的催化剂表面有利于苯酚分子在催化剂表面的富集进而促进反应的进行.

Controllable Synthesis and Catalytic Applications of Hydrophobic Hybrid Zeolites†

Ethyl/methyl-functionalized hybrid zeolites were synthesized using methyltriethoxysilane and ethyltriethoxysilane as organic silicon sources through rotating and static dry-gel conversion methods and characterized. The hydrophobicity of hybrid zeolites can be adjusted by synthetic routes, carbon chain length and gel composition, and hybrid zeolite with water contact angle of 124° were obtained. The catalyst prepared using hydrophobic hybrid zeolite as support showed excellent catalytic performance in the hydrogenation of phenol. It is ascribed to the aggregation of phenol molecules on the hydrophobic/lipophilic surface of catalyst that promotes the reaction efficiently.