A Facile and Convenient Route for Synthesis of Silver Biopolymer Gel Bead Nanocomposites by Different Approach Towards Immobilization and Its Catalytic Applications

Green synthesis of silver nanoparticles-calcium alginate beads (AgNP-CA) was prepared using five different methods. The immobilization/reduction/incorporation of AgNPs on alginate biopolymer using Walsura trifoliata bark extract as reducing and capping agent were confirmed by the characterization re...

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Bibliographic Details
Published in:Catalysis letters 2018-05, Vol.148 (5), p.1514-1524
Main Authors: Saran, S., Manjari, G., Devipriya, Suja P.
Format: Article
Language:English
Subjects:
Adsorption
Aminophenol
Bark
Beads
Biopolymers
Calcium alginate
Catalysis
Catalytic activity
Chemical synthesis
Chemistry
Chemistry and Materials Science
Herbal medicine
Immobilization
Industrial Chemistry/Chemical Engineering
Liquid phases
Nanocomposites
Nanoparticles
Nitrophenol
Organometallic Chemistry
Physical Chemistry
Polymers
Reagents
Reduction
Silver
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Summary:Green synthesis of silver nanoparticles-calcium alginate beads (AgNP-CA) was prepared using five different methods. The immobilization/reduction/incorporation of AgNPs on alginate biopolymer using Walsura trifoliata bark extract as reducing and capping agent were confirmed by the characterization results of UV–Vis spectra, XRD, FTIR, and TEM techniques. The prepared Ag-CA nanocomposite catalyst was used for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of sodium borohydride (NaBH 4 ) in a liquid phase at ambient conditions. Comparatively, AgNPs-ACA (Adsorption calcium alginate) exhibited very high catalytic activity in the reduction of 4-nitrophenol within few seconds with exceptional stability, up to ten cycles without any loss in the catalytic activity. This study reports effective synthesis of AgNPs on alginate polymer beads via phytochemicals of aqueous extract of W. trifoliata and its excellent catalytic efficiency towards 4-nitrophenol reduction as of the practical application. Graphical Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-018-2350-3