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Erschienen in: Rare Metals 10/2015

01.10.2015

Microwave-assisted synthesis of L-cysteine-capped nickel nanoparticles for catalytic reduction of 4-nitrophenol

verfasst von: Nazar Hussain Kalwar, Ayman Nafady, Razium Ali Soomro, Sirajuddin, Syed Tufail Hussain Sherazi, Abdul Rauf Khaskheli, Keith Richard Hallam

Erschienen in: Rare Metals | Ausgabe 10/2015

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Abstract

A simple and efficient microwave-assisted procedure for synthesis of L-cysteine-capped nickel nanoparticles (cyst-Ni NPs) in ethylene glycol solvent was demonstrated. The as-synthesised NPs were characterised by ultraviolet–visible (UV–Vis) spectrophotometer, Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The cyst-Ni NPs are proved to be excellent heterogeneous catalysts for the 100 % reduction of 4-nitrophenol (4-NPh) in the presence of reductant (NaBH4) within reaction time of 40 s. In contrast, Raney nickel in similar sample environments shows only 25.5 % reduction. The kinetic and energetic behaviours of cyst-Ni NPs were also studied, and the reduction reaction is determined to follow pseudo-first-order kinetics with a rate constant value of 0.115 s−1 and activation energy of 36.1 kJ·mol−1. In addition to its high catalytic competence, cyst-Ni NPs catalyst exhibits excellent recyclability with negligible catalytic poisoning.

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Metadaten
Titel
Microwave-assisted synthesis of L-cysteine-capped nickel nanoparticles for catalytic reduction of 4-nitrophenol
verfasst von
Nazar Hussain Kalwar
Ayman Nafady
Razium Ali Soomro
Sirajuddin
Syed Tufail Hussain Sherazi
Abdul Rauf Khaskheli
Keith Richard Hallam
Publikationsdatum
01.10.2015
Verlag
Nonferrous Metals Society of China
Erschienen in
Rare Metals / Ausgabe 10/2015
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-015-0475-8

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