Catalytic polymeric membranes with palladium nanoparticle/multi-wall carbon nanotubes as hierarchical nanofillers: preparation, characterization and application

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• 作者：Hossein Mahdavi ; Akram Rahimi ; Taieb Shahalizade
• 关键词：Catalytic polymeric membrane ; Flow ; through membrane reactor ; Palladium–MWCNT ; Hierarchical nanostructure ; Oxidation of alcohols
• 刊名：Journal of Polymer Research
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：23
• 期：3
• 全文大小：2,055 KB
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• 作者单位：Hossein Mahdavi (1)
  Akram Rahimi (1)
  Taieb Shahalizade (1)
  
  1. School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  
• 出版者：Springer Netherlands
• ISSN：1572-8935

文摘

In this study, incorporation of Palladium nanoparticles into the membrane matrix using hierarchical nanostructures is reported as a novel approach to prepare catalytic polymeric membranes (CPMs). CMPs are prepared through a phase inversion method by loading of palladium nanoparticles decorated multi-wall carbon nanotubes (Pd–MWCNTs) with three different concentrations (0.1 %, 0.5 % and 1 wt%) in polysulfone/t-BA–EDA grafted polysulfone matrix. The Pd-MWCNTs impregnated PSf/PSf–g–P(t-BA–EDA) membranes are thoroughly characterized using TEM and XRD. SEM, TGA and DSC analyses were also performed to evaluate the effect of the Pd–MWCNTs on the morphology and thermal properties of catalytic membranes. The developed membranes are applied in a flow-through mode and showed excellent catalytic activities for selective oxidation of different alcohols to the corresponding aldehydes or ketones at solvent-free conditions. It was found that the reactivity and reusability of this catalytic membranes containing Pd–MWCNT were better than the conventional catalytic membranes containing free Pd nanoparticles. Catalytic membrane containing 1 % of Pd–MWCNT showed the highest reaction conversion (> 98 %) in 5th cycle for benzyl alcohol oxidation. Moreover, 100 % aldehyde and ketone selectivity were observed for all the catalytic membrane samples.