期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 488, 期 -, 页码 135-141出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.10.088
关键词
Au nanoparticles; Graphene; Electrodeposition; NaNO2
资金
- National Natural Science Foundation of China [51373111]
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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 mu M, with a detection limit of 0.01 mu M (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. (C) 2016 Elsevier Inc. All rights reserved.
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