Postsynthesis of FAU-type stannosilicate as efficient heterogeneous catalyst for Baeyer-Villiger oxidation
Postsynthesis of FAU-type stannosilicate as efficient heterogeneous catalyst for Baeyer-Villiger oxidation
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FAU 型硅酸锡作为拜耳-维利格氧化高效多相催化剂的后合成
DOI：
10.1016/j.apcata.2016.04.001
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Wu Peng
中科院分区：
文献类型：
--
作者：
Zhu Zhiguo;Xu Hao;Jiang Jingang;Liu Xue;Ding Jianghong;Wu Peng
以适当脱铝的USY分子筛和SnCl 4水蒸气为原料，采用原子植入法制备了具有分级孔系的Sn-Y分子筛。通过水蒸汽和酸处理生成的“硅醇巢”与SnCl 4分子反应，Sn离子四面体地嵌入到沸石骨架中。Sn的掺入量与脱铝程度密切相关，脱铝后Sn的最大含量为2.6wt当母体USY沸石通过精确控制的酸处理来处理时，与Sn-MFI、Sn-MWW、Sn-MCM-41、水热合成或后合成的Sn-β相比，该分子筛在以H2 O2或叔丁基过氧化氢为氧化剂的Baeyer-Villiger氧化反应中表现出优异的催化性能，这主要归因于三维十二元环孔道和脱铝形成的晶内介孔结构。
Sn-Y zeolite with hierarchical pore system was prepared using the atom-planting method from properly dealuminated USY zeolite and SnCl4vapor. Sn ions were tetrahedrally incorporated into the zeolite framework by the reaction between the SnCl4molecules and the “silanol nests” generated by steaming and acid treatment. The amount of incorporated Sn depended closely on the dealumination degree, in which the maximum Sn content of 2.6 wt.% was achieved when the parent USY zeolite was treated by precisely controlled acid treatment. Compared with Sn-MFI, Sn-MWW, Sn-MCM-41, hydrothermally synthesized or postsynthesized Sn-Beta, thus prepared Sn-Y zeolite showed excellent catalytic properties in the Baeyer-Villiger oxidation of 2-adamantanone using hydrogen peroxide ortert-butyl hydroperoxide as oxidant, which was mainly attributed to the open pore system contributed by 3-dimensional 12-membered ring channels and dealumination-derived intracrystal mesoporosity.