Mg2+-derived mesoporous ultra-high silica twelve-membered-ring basic zeolites: straightforward synthesis and catalytic performanceElectronic supplementary information (ESI) available: Fig. S1-S5. See DOI: 10.1039/c5ce02075a
Mg 2+ -derived mesoporous ultra-high silica twelve-membered-ring zeolites with multiple topologies (MOR, BEA and MTW) were straightforwardly synthesized by a one-pot route, where the crucial step was the co-hydrolysis/condensation of silica source and magnesium salt under moderate acidic conditions....
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09.02.2016
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Abstract | Mg
2+
-derived mesoporous ultra-high silica twelve-membered-ring zeolites with multiple topologies (MOR, BEA and MTW) were straightforwardly synthesized by a one-pot route, where the crucial step was the co-hydrolysis/condensation of silica source and magnesium salt under moderate acidic conditions. SiO
2
/Al
2
O
3
ratios can be adjusted from ∼30 to as high as 410, thus generating superior basicity that was further improved by the incorporation of Mg species. A mesoporous structure was self-formed without the assistance of any template or special strategy. Catalysis tests showed high activity of these zeolites in a typical base reaction, Knoevenagel condensation, even for the bulky substrates due to the enhanced mass transfer arising from the mesopores. This methodology provides a promising approach towards target synthesis of valuable Mg
2+
-derived mesoporous ultra-high silica zeolites with tunable acid/base properties, which can even act as an efficient mesoporous zeolitic solid base.
Mg
2+
-derived ultra-high silica mesoporous zeolites are synthesized by acidic pre-co-hydrolysis/condensation and act as an efficient zeolitic solid base in Knoevenagel condensations. |
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AbstractList | Mg
2+
-derived mesoporous ultra-high silica twelve-membered-ring zeolites with multiple topologies (MOR, BEA and MTW) were straightforwardly synthesized by a one-pot route, where the crucial step was the co-hydrolysis/condensation of silica source and magnesium salt under moderate acidic conditions. SiO
2
/Al
2
O
3
ratios can be adjusted from ∼30 to as high as 410, thus generating superior basicity that was further improved by the incorporation of Mg species. A mesoporous structure was self-formed without the assistance of any template or special strategy. Catalysis tests showed high activity of these zeolites in a typical base reaction, Knoevenagel condensation, even for the bulky substrates due to the enhanced mass transfer arising from the mesopores. This methodology provides a promising approach towards target synthesis of valuable Mg
2+
-derived mesoporous ultra-high silica zeolites with tunable acid/base properties, which can even act as an efficient mesoporous zeolitic solid base.
Mg
2+
-derived ultra-high silica mesoporous zeolites are synthesized by acidic pre-co-hydrolysis/condensation and act as an efficient zeolitic solid base in Knoevenagel condensations. |
Author | Zhou, Yu Zhang, Wei Wang, Jun Xie, Jingyan Wen, Haimeng |
AuthorAffiliation | State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University (formerly Nanjing University of Technology) |
AuthorAffiliation_xml | – name: State Key Laboratory of Materials-Oriented Chemical Engineering – name: College of Chemical Engineering – name: Nanjing Tech University (formerly Nanjing University of Technology) |
Author_xml | – sequence: 1 givenname: Jingyan surname: Xie fullname: Xie, Jingyan – sequence: 2 givenname: Haimeng surname: Wen fullname: Wen, Haimeng – sequence: 3 givenname: Wei surname: Zhang fullname: Zhang, Wei – sequence: 4 givenname: Yu surname: Zhou fullname: Zhou, Yu – sequence: 5 givenname: Jun surname: Wang fullname: Wang, Jun |
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Notes | 10.1039/c5ce02075a Electronic supplementary information (ESI) available: Fig. S1-S5. See DOI |
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2+
-derived mesoporous ultra-high silica twelve-membered-ring zeolites with multiple topologies (MOR, BEA and MTW) were straightforwardly synthesized by a... |
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Title | Mg2+-derived mesoporous ultra-high silica twelve-membered-ring basic zeolites: straightforward synthesis and catalytic performanceElectronic supplementary information (ESI) available: Fig. S1-S5. See DOI: 10.1039/c5ce02075a |
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