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Author Miao, Zongcheng ♦ Yang, Fengxia ♦ Luan, Yi ♦ Shu, Xin ♦ Ramella, Daniele
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ CATALYSTS ♦ EFFICIENCY ♦ FERRITES ♦ HETEROGENEOUS CATALYSIS ♦ IRON OXIDES ♦ LAYERS ♦ MAGNETIC FIELDS ♦ MICROSPHERES ♦ ORGANOMETALLIC COMPOUNDS ♦ PH VALUE ♦ SYNTHESIS
Abstract In this work, a core-shell magnetic composite Fe{sub 3}O{sub 4}@P4VP@ZIF-8 microspheres were successfully designed and synthesized. A polymerization approach on the surface of pre-made Fe{sub 3}O{sub 4} microspheres was employed for the synthesis of Fe{sub 3}O{sub 4}@P4VP. The zinc-derived Zeolite Imidazolate Framework (ZIF) shell was introduced through a layer-by-layer strategy. The obtained Fe{sub 3}O{sub 4}@P4VP@ZIF-8 core-shell structure was employed as an efficient Knoevenagel condensation catalyst for a variety of aldehydes. Furthermore, the inner P4VP layer also served as a basic additive in the condensation reaction process, while much less homogeneous basic additive was used. High catalytic reaction efficiency was achieved when the P4VP layer was utilized in combination with a Lewis acidity bearing ZIF-8 layer. The Fe{sub 3}O{sub 4}@P4VP@ZIF-8 catalyst was tested for recyclability and no drop in the catalytic activity was observed after more than five cycles. - Highlights: • A newly designed Fe{sub 3}O{sub 4}@P4VP@ZIF-8 core-shell catalyst is reported. • Layer-by-layer strategy was utilized to achieve core-shell structure at 400 nm. • The Fe{sub 3}O{sub 4}@P4VP@ZIF-8 core-shell material can be applied in an efficient Knoevenagel reaction. • Rapid catalyst recycling through external magnetic field.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-12-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 256


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