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Encaging Palladium Nanoparticles in Chitosan Modified Montmorillonite for Efficient, Recyclable Catalysts
Zeng, MF; Wang, YD; Liu, Q; Yuan, X; Zuo, SF; Feng, RK; Yang, J; Wang, BY; Qi, CZ; Lin, Y; Yang J(杨静); Wang BY(王宝义)
2016
发表期刊ACS APPLIED MATERIALS & INTERFACES
卷号8期号:48页码:33157-33164
摘要Metal nanoparticles, once supported by a suitable scaffolding material, can be used as highly efficient heterogeneous catalysts for numerous organic reactions. The challenge, though, is to mitigate the continuous loss of metals from the supporting materials as reactions proceed, so that the catalysts can be recycled multiple times. Herein, we combine the excellent chelating property of chitosan (CS) and remarkable stability of montmorillonite (MMT) into a composite material to support metal catalysts such as palladium (Pd). The in situ reduction of Pd2+ into Pd-0 in the interstices of MMT/CS composites effectively encages the Pd-0 nanoparticles in the porous matrices, while still allowing for reactant and product molecules of relatively small sizes to diffuse in and out the matrices. The prepared Pd-0@MMT/CS catalysts are highly active for the Heck reactions of aromatic halides and alkenes, and can be recycled 30 times without significant loss of activities. Positron annihilation lifetime analysis and other structural characterization methods are implemented to elucidate the unique compartmentalization of metal catalysts in the composite matrices. As both CS and MMT are economical and abundant materials in nature, this approach may facilitate a versatile platform for developing highly recyclable, heterogeneous catalysts containing metal nanoparticles.
文章类型期刊论文
关键词heterogeneous catalysis palladium montmorillonite chitosan positron annihilation
DOI10.1021/acsami.6b09895
关键词[WOS]COUPLING REACTIONS ; POSITRON-ANNIHILATION ; SUZUKI-MIYAURA ; HETEROGENEOUS CATALYSTS ; SONOGASHIRA REACTIONS ; HYBRID MICROSPHERES ; DOUBLE-BONDS ; FREE-VOLUME ; HECK ; HYDROGENATION
语种英语
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号WOS:000389624600061
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260365
专题多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Zeng, MF,Wang, YD,Liu, Q,et al. Encaging Palladium Nanoparticles in Chitosan Modified Montmorillonite for Efficient, Recyclable Catalysts[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(48):33157-33164.
APA Zeng, MF.,Wang, YD.,Liu, Q.,Yuan, X.,Zuo, SF.,...&王宝义.(2016).Encaging Palladium Nanoparticles in Chitosan Modified Montmorillonite for Efficient, Recyclable Catalysts.ACS APPLIED MATERIALS & INTERFACES,8(48),33157-33164.
MLA Zeng, MF,et al."Encaging Palladium Nanoparticles in Chitosan Modified Montmorillonite for Efficient, Recyclable Catalysts".ACS APPLIED MATERIALS & INTERFACES 8.48(2016):33157-33164.
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