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Silver nanoparticles immobilized on fibrous nano-silica as highly efficient and recyclable heterogeneous catalyst for reduction of 4-nitrophenol and 2-nitroaniline

Paper ID Volume ID Publish Year Pages File Format Full-Text
45863 46426 2014 7 PDF Available
Title
Silver nanoparticles immobilized on fibrous nano-silica as highly efficient and recyclable heterogeneous catalyst for reduction of 4-nitrophenol and 2-nitroaniline
Abstract

•Ag NPs were well-dispersed on the fibers of the KCC-1 without aggregation.•Ag/KCC-1 nanocataly with easy accessibility owing to its fibers and not pores.•Ag/KCC-1 showed excellent catalytic activity in reduction of nitro-compounds.•Ag/KCC-1 could be easily reused for ten times without losing catalytic activity.

In this study, a novel fibrous nano-silica (KCC-1) based nanocatalyst (Ag/KCC-1) with high surface area and easy accessibility of active sites was successfully developed by a facile approach. KCC-1 with high surface area was functionalized with amino groups acting as the robust anchors so that the silver nanoparticles (Ag NPs) with average diameter of about 4 nm were well-dispersed on the fibers of the KCC-1 microspheres, without aggregation. The synthesized Ag/KCC-1 nanocatalyst exhibited excellent catalytic activity for the reduction of 4-nitrophenol and 2-nitroaniline using sodium borohydride (NaBH4) in water at room temperature owing to the easy accessibility of the active sites. Importantly, the Ag/KCC-1 nanocatalyst was easily recovered and reused for at least ten cycles in both the reduction reactions; thus, confirming its good stability. The enhanced stability was attributed to the modification of the fibrous nature of KCC-1 by the amino groups; thus, restricting Ostwald ripening and leaching of Ag NPs. Therefore, the abovementioned approach based on fibrous KCC-1 provided a useful platform for the fabrication of noble metal nanocatalysts with easy accessibility, which would be highly efficient in various catalytic reductions.

Graphical abstractA novel fibrous nano-silica (KCC-1) based nanocatalyst (Ag/KCC-1) with high surface area and easy accessibility of active sites was successfully developed and used in the reduction of 4-NP and 2-NA.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Fibrous nano-silica; Ag/KCC-1 nanocatalyst; Easy accessibility; Reduction; Nitro-compounds
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Silver nanoparticles immobilized on fibrous nano-silica as highly efficient and recyclable heterogeneous catalyst for reduction of 4-nitrophenol and 2-nitroaniline
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 158–159, October 2014, Pages 129–135
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us