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

被引：0

作者：

Nazar Hussain Kalwar ^{[1
]}

Ayman Nafady ^{[2
]}

Razium Ali Soomro ^{[1
,3
]}

Sirajuddin ^{[1
]}

Syed Tufail Hussain Sherazi ^{[1
]}

Abdul Rauf Khaskheli ^{[1
,4
]}

Keith Richard Hallam ^{[3
]}

机构：

[1] National Centre of Excellence in Analytical Chemistry,University of Sindh

[2] Department of Chemistry,College of Science,King Saud University

[3] Interface Analysis Centre,School of Physics,University of Bristol

[4] Department of Pharmacy,Shaheed Mohtarma Benazir Bhutto Medical University

来源：

Rare Metals | 2015年 / 34卷 / 10期

关键词：

L-cysteine; Nickel nanoparticles; Catalyst; Reduction of 4-nitrophenol;

D O I：

暂无

中图分类号：

O643.36 [催化剂];

学科分类号：

081705 ;

摘要：

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(Na BH4)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.

引用

页码：683 / 691

页数：9

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