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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
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume8Issue:48Pages:33157-33164
SubtypeArticle
AbstractMetal 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.
Keywordheterogeneous catalysis palladium montmorillonite chitosan positron annihilation
DOI10.1021/acsami.6b09895
WOS KeywordCOUPLING REACTIONS ; POSITRON-ANNIHILATION ; SUZUKI-MIYAURA ; HETEROGENEOUS CATALYSTS ; SONOGASHIRA REACTIONS ; HYBRID MICROSPHERES ; DOUBLE-BONDS ; FREE-VOLUME ; HECK ; HYDROGENATION
Indexed BySCI
Language英语
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000389624600061
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/260365
Collection中国科学院高能物理研究所
Affiliation中国科学院高能物理研究所
Recommended Citation
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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