Journal
CARBOHYDRATE POLYMERS
Volume 132, Issue -, Pages 554-564Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.06.051
Keywords
Electrospinning; Cellulose nanocomposites; Noble metals; Surface modification; Heterogeneous catalysis; Reusability
Categories
Ask authors/readers for more resources
In this study, cellulose acetate nanofibers (CANFs) with a mean diameter of 325 +/- 2.0 nm were electro-spun followed by deacetylation and functionalization to produce anionic cellulose nanofibers (f-CNEs). The noble metal nanoparticles (RuNPs and AgNPs) were successfully decorated on thef-CNEs by a simple wet reduction method using NaBH4 as a reducing agent. TEM and SEM images of the nanocomposites (RuNPs/CNFs and AgNPs/CNFs) confirmed that the very fine RuNPs or AgNPs were homogeneously dispersed on the surface of f-CNEs. The weight percentage of the Ru and Ag in the nanocomposites was found to be 13.29 wt% and 22.60 wt% respectively; as confirmed by SEM-EDS analysis. The metallic state of the Ru and Ag in the nanocomposites was confirmed by XPS and XRD analyses. The usefulness of these nanocomposites was realized from their superior catalytic activity. In the aerobic oxidation of benzyl alcohol to benzaldehyde, the RuNPs/CNFs system gave a better yield of 89% with 100% selectivity. Similarly, the AgNPs/CNFs produced an excellent yield of 99% (100% selectivity) in the aza-Michael reaction of 1-phenylpiperazine with acrylonitrile. Mechanism has been proposed for the catalytic systems. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available