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Encapsulation of palladium nanoparticles by multiwall carbon nanotubes-graft-poly(citric acid) hybrid materials

Adeli, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1002/app.30912
  3. Publisher: 2010
  4. Abstract:
  5. Citric acid was polymerized onto the surface of functionalized multiwall carbon nanotubes (MWCNTCOOH) and MWCNT-graft-poly(citric acid) (MWCNTg-PCA) hybrid materials were obtained. Due to the grafted poly(citric acid) branches, MWCNT-g-PCA hybrid materials not only were soluble in water but also were able to trap water soluble metal ions. Reduction of trapped metal ions in the polymeric shell of MWCNT-g-PCA hybrid materials by reducing agents such as sodium borohydride led to encapsulated metal nanoparticles on the surface of MWCNT. Herein palladium nanoparticles were encapsulated and transported by MWCNT-g-PCA hybrid materials (MWCNT-g-PCA-EPN) and their application as nanocatalyst toward Heck reaction in different conditions was investigated. The catalytic activity of palladium ions supported by MWCNT-g-PCA hybrid materials (MWCNT-g-PCAPdCl2) toward Heck reactions is much more than for MWCNT-g-PCA-EPN. Structure, characteristics and catalytic activity of synthesized systems was investigated using spectroscopy and microscopy methods
  6. Keywords:
  7. Carbon nanotube ; Poly(citric acid) ; Carbon nanotube hybrids ; Catalytic activity ; Functionalized ; Heck reactions ; Metal nanoparticles ; Multi-Wall Carbon Nanotubes ; Nano-catalyst ; Palladium ion ; Palladium nanoparticles ; Polymeric shell ; Sodium borohydrides ; Water-soluble metal ions ; Acids ; Catalyst activity ; Electrochemical sensors ; Functional polymers ; Grafting (chemical) ; Metal ions ; Multiwalled carbon nanotubes (MWCN) ; Nanoparticles ; Palladium ; Reducing agents ; Trace analysis ; Hybrid materials ; Carbon ; Catalyst ; Chemical reaction ; Citric acid ; Encapsulation ; Grafting ; Ion exchange ; Nanotube ; Polymerization ; Reducing agent ; Solubility ; Synthesis ; Transport process
  8. Source: Journal of Applied Polymer Science ; Volume 116, Issue 4 , 2010 , Pages 2188-2196 ; 00218995 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/app.30912/full