期刊
APPLIED CLAY SCIENCE
卷 216, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.clay.2021.106365
关键词
Core-shell structures; Layered double hydroxides; MgAl catalysts; Aldol condensation; Base catalysis
资金
- Czech Science Foundation of the Czech Republic [19-22978S]
- European Regional Development Fund-Project International mobility of employees of the University of Pardubice II [CZ.02.2.69/0.0/0.0/18_053/0016969]
- [LM2018103]
This manuscript presents a method for preparing well-oriented @MgAl-layered double hydroxides and demonstrates the potential of @MgAl-mixed oxides in catalysis. The controlled removal of SiO2 core led to the formation of empty LDH spheres with preserved crystalline properties. The best furfural conversion was achieved with @MgAl-MO having a Si/(Si + Mg + Al) molar ratio of 0.11.
This manuscript presents the preparation of well-oriented @MgAl-layered double hydroxides (LDHs). It extends the reported preparation of SiO2@MgAl-LDH core-shell material (Si/(Si + Mg + Al) molar ratio = 0.54, Mg/Al = 2). There is introduced a new method for the gradual and controlled removal of the SiO2 core from SiO2@MgAl-LDH on treatment with a NaOH solution (1 M) for 1, 2, 4, and 6 h Si/(Si + Mg + Al) molar ratio from 0.06 to 0.52, Mg/Al = 2). Subsequent SiO2 leaching led to empty spheres with properties of the crystalline MgAl-LDH phase preserved. It is proved that @MgAl-LDH spheres formed do not collapse and hence, preserve their orig-inal spherical shape and structural properties. The potential of @MgAl-mixed oxides (MOs) obtained by thermal treatment of @MgAl-LDHs in catalysis is also demonstrated. When this material was used for the aldol condensation reaction of furfural with acetone, the best furfural conversion was obtained for @MgAl-MO with a Si/(Si + Mg + Al) molar ratio of 0.11.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据