Electrochemical synthesis of gold nanoparticles decorated flower-like graphene for high sensitivity detection of nitrite

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• 作者：Cui&rsquo ; e Zou^a ; Beibei Yang^a ; Duan Bin^a ; Jin Wang^a ; Shumin Li^a ; Ping Yang^a ; Caiqin Wang^a ; Yukihide Shiraishi^b ; Yukou Du^a ; ^{duyk@suda.edu.cn}
• 关键词：Au nanoparticles ; Graphene ; Electrodeposition ; NaNO2
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：488
• 期：Complete
• 页码：135-141
• 全文大小：2289 K
• 卷排序：488

文摘

In this paper, the spherical Au nanoparticles and 3D flower-like structure graphene were successively deposited on glassy carbon electrode (GCE) (Au/f-GE/GCE) via a facile and two-step electrodeposition method for the detection of nitrite ions (NaNO2). The morphology and composition elements were confirmed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction measurements (XRD). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to evaluate the electrochemical behaviors of NaNO2 on the as-prepared electrode. Compared to f-GE/GCE and Au/GCE, Au/f-GE/GCE showed a sharp and obvious oxidation peak at 0.78 V. The oxidation peak current of NaNO2 was linearly proportional to its concentration in the range from 0.125 to 20375.98 μM, with a detection limit of 0.01 μM (at S/N = 3). Furthermore, the experiment results also showed that the as-prepared electrode exhibited excellent reproducibility and long-term stability, as well as good recovery when applied to the determination of NaNO2 in pickled pork samples.