期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 315, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2020.128091
关键词
Nickel ion; Electrochemical sensor; Zeolitic imidazolate framework; Dimethylglyoxime; Reduced graphene oxide
资金
- National Natural Science Foundation of China [21777106]
- National Major Science & Technology Program for Water Pollution Control Treatment [2017ZX07202]
In this paper, a sensitive and selective electrochemical sensor was constructed for nickel (II) detection by employing the electrode material of zeolitic imidazolate framework-8@dimethylglyoxime/beta-cyclodextrin/reduced graphene oxide (ZIF-8@DMG/beta-CD/RGO). The material was characterized and analyzed by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Nitrogen adsorption-desorption isotherms in detail. In these composite, ZIF-8 served as the supporting material of DMG which was the selective complexing agent to Ni (II), RGO employed conductivity while beta-CD prevented the aggregation of RGO sheets. With these features, the sensor showed a wide linear range of 0.01-1.0 mu M and a low detection limit of 0.005 mu M (S/N= 3). Interferences of diethanol, citric acid, humic acid, Triton X-100 and some common metal ions can be ignored to some extent. Finally, the sensor was applied to Ni (II) detection in real water sample.
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