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Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
39441 45823 2014 9 PDF Available
Title
Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst
Abstract

•MWCNTs were functionalized by Bingel reaction followed by amidation with cysteamine.•This material acted as a support for in situ deposition of 4 nm gold nanoparticles.•The nanohybrid was tested on the total reduction of 4-nitrophenol by NaBH4.•It showed to be a highly active catalyst with a rate constant of k = 0.436 min−1.•No loss of catalytic activity was observed after six reutilization cycles.

Multiwall carbon nanotubes (MWCNT) functionalized with bidentate thiol groups have been prepared through Bingel reaction followed by amidation of the malonyl ester groups with cysteamine. This material acted as a convenient support for the in situ deposition of gold nanoparticles. Chemical and structural characterization of the materials was performed by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy, confirming the retention of the intrinsic carbon nanotube structural properties and the deposition of spherical gold nanoparticles (AuNPs) with diameters of 4 ± 1 nm. This nanohybrid showed to be a highly active and robust catalyst on the total reduction of 4-nitrophenol in the presence of NaBH4, showing a rate constant of k = 0.436 min−1, with no loss of catalytic activity after six reutilization cycles. Control materials prepared by direct immobilization of Au nanoparticles onto pristine carbon nanotubes and on Bingel functionalized MWCNT material led to lower Au loading or afforded less stable catalysts, resulting in significantly poorer catalytic activity.

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Keywords
Gold nanoparticles; MWCNT; Bingel reaction; Heterogeneous catalysis; Nitroaromatics; Pollutant reduction; NaBH4
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Gold nanoparticles decorated on Bingel–thiol functionalized multiwall carbon nanotubes as an efficient and robust catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 486, 22 September 2014, Pages 150–158
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