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

Research paper by Cui’e Zou, Beibei Yang, Duan Bin, Jin Wang, Shumin Li, Ping Yang, Wang Caiqin, Yukihide Shiraishi, Yukou Du

Indexed on: 04 Nov '16Published on: 31 Oct '16Published in: Journal of Colloid and Interface Science



Abstract

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 – 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.

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