循环伏安法
石墨烯
介电谱
纳米材料
傅里叶变换红外光谱
拉曼光谱
微分脉冲伏安法
检出限
胶体金
电化学
材料科学
钯
核化学
纳米颗粒
电化学气体传感器
分析化学(期刊)
化学
电极
化学工程
纳米技术
色谱法
有机化学
物理化学
工程类
物理
光学
催化作用
作者
Thangavelu Kokulnathan,Raja Nehru,Shen‐Ming Chen,Wen Bo Liao
标识
DOI:10.1016/j.jcis.2017.04.042
摘要
Amalgamation of noble metal nanomaterials on graphene flakes potentially paves one way to improve their physicochemical properties. This paper deals with the simultaneous electrochemical deposition of gold and palladium nanoparticles on graphene flakes (Au/PdNPs-GRF) for the sensitive determination of caffeic acid (CA). The physiochemical properties of the prepared Au/PdNPs-GRF was characterized by using numerous analytical techniques such as scanning electron microscopy, electron dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, Raman spectroscopy and electrochemical impedance spectroscopy. The enhanced electrochemical determination of CA at Au/PdNPs deposition on GRF were studied by using cyclic voltammetry and differential pulse voltammetry. In results, Au/PdNPs-GRF electrode exhibited an excellent electrocatalytic activity towards CA with wide linear range and low limit of detection of 0.03–938.97 µM and 6 nM, respectively. Eventually, the Au/PdNPs-GRF was found as a selective and stable active material for the sensing of CA. In addition, the proposed sensor showed the adequate results in real sample analysis.
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