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New catalytic route: Hydrogels as templates and reactors for in situ Ni nanoparticle synthesis and usage in the reduction of 2- and 4-nitrophenols

Paper ID Volume ID Publish Year Pages File Format Full-Text
41984 45906 2010 7 PDF Available
Title
New catalytic route: Hydrogels as templates and reactors for in situ Ni nanoparticle synthesis and usage in the reduction of 2- and 4-nitrophenols
Abstract

Nickel nanoparticles inside poly(2-acrylamido-2-methyl-1-propansulfonic acid) (p(AMPS)) hydrogel were prepared by reduction of Ni(II) ions absorbed within hydrogel network. TEM images confirmed that in situ formed nickel particle in p(AMPS) hydrogel networks are about 100 nm. These nickel metal nanoparticles containing hydrogel-composites were utilized as catalysts and reaction media for the reduction reactions of aromatic nitro compounds, 2- and 4-nitrophenols with aqueous NaBH4. The reduction rate constants at four different temperatures (30, 40, 50 and 60 °C) and activation parameters were calculated. The activation energies (Ea) for 4- and 2-nitrophenols are 25.70 and 38.69 kJ mol−1, respectively. It was found that these types of hydrogel-composite catalyst systems can be used repetitively up to five times with 100% conversion and only with 25% reduction in the initial reduction rate.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (66 K)Download as PowerPoint slideResearch highlights▶ Flexible soft environmentally benign smart hydrogels. ▶ As template for Ni nanoparticle synthesis. ▶ As reaction vessel for the reduction of nitro compounds.

Keywords
Hydrogel reactor; Nanocomposites; Ni catalyst; Nanoparticles; Hydrogel-template
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New catalytic route: Hydrogels as templates and reactors for in situ Ni nanoparticle synthesis and usage in the reduction of 2- and 4-nitrophenols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 385, Issues 1–2, 15 September 2010, Pages 201–207
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