Controlled detitanation of ETS-10 materials through the post-synthetic treatment and their applications to the liquid-phase epoxidation of alkenes
Controlled detitanation of ETS-10 materials through the post-synthetic treatment and their applications to the liquid-phase epoxidation of alkenes
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DOI：
10.1016/j.micromeso.2004.03.007
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发表时间：
2004-05
影响因子：
5.2
通讯作者：
Y. Goa;H. Yoshitake;Peng Wu;T. Tatsumi
中科院分区：
文献类型：
--
作者：
Y. Goa;H. Yoshitake;Peng Wu;T. Tatsumi
用HCl、NH4Cl或柠檬酸处理ETS-10型钛硅酸盐后，钛的配位环境发生了变化。这些处理也导致从ETS-10的框架部分提取Ti。局部结构的变化导致环己烯与H2O2环氧化反应活性位点的形成。原始[Na，K]型ETS-10在3.7 moldm−3NH4Cl溶液中处理后，在723 K下煅烧，h2o2作为氧化剂的环氧化活性和效率最高。
Treatments of ETS-10 titanosilicates with HCl, NH4Cl or citric acid led to the change in the coordination environment of Ti. These treatments also led to the partial extraction of Ti from the framework of ETS-10. The local structural changes brought about the formation of the active sites for the epoxidation of cyclohexene with H2O2. The highest epoxidation activity and efficiency of H2O2as an oxidant were achieved when the original [Na,K]-type ETS-10 was treated with 3.7 moldm−3NH4Cl solution followed by the calcination at 723 K.