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Green synthesis of silver nanoparticles (SNPs)-modified electrode for electrochemical detection of nitrobenzene
Journal of the Iranian Chemical Society ( IF 2.4 ) Pub Date : 2019-12-06 , DOI: 10.1007/s13738-019-01822-z
M. Shivakumar , M. S. Dharmaprakash , S. Manjappa , K. L. Nagashree

Nitrobenzene (NB) is a highly toxic and hazardous compound that needs to be detected at the low level. The current work describes an eco-friendly synthesis of silver nanoparticles (SNPs) using a Eucalyptus extract as reducing and stabilizing agent and its use for electrochemical detection of NB. The synthesized SNPs were characterized by following techniques UV–visible spectroscopy, powder X-ray diffraction, FESEM, HRTEM and TEM, FTIR spectroscopy. Further electrochemical investigation of SNPs-modified glassy carbon electrode (SNPs/GCE) is carried out by cyclic voltammetric and differential pulse voltammetric techniques. The prepared NPs exhibit excellent electrochemical behaviour towards reduction of NB and show a linear response in the range 5–40 µM, sensitivity of 2.262 µA µM−1 cm−2 and limit of detection of 0.027 µM. SNPs/GCE shows good selectivity towards NB detection. Also, the system exhibits a considerable recovery towards NB detection in of water and waste samples.

中文翻译:

绿色合成的纳米银(SNPs)修饰电极用于硝基苯的电化学检测

硝基苯(NB)是一种剧毒且有害的化合物,需要低水平检测。当前的工作描述了使用桉树提取物作为还原剂和稳定剂的银纳米颗粒(SNP)的生态友好合成方法及其在NB电化学检测中的用途。通过以下技术对合成的SNP进行表征:紫外可见光谱,粉末X射线衍射,FESEM,HRTEM和TEM,FTIR光谱。通过循环伏安法和差分脉冲伏安法对SNPs修饰的玻碳电极(SNPs / GCE)进行了进一步的电化学研究。制备的NP对NB还原具有优异的电化学行为,并在5–40 µM范围内显示线性响应,灵敏度为2.262 µA µM -1  cm-2,检测下限为0.027 µM。SNP / GCE对NB检测显示出良好的选择性。而且,该系统在水和废物样品中的NB检测方面显示出可观的恢复。
更新日期:2019-12-06
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