Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 251, Issue -, Pages 706-712Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.05.042
Keywords
Prussian blue; Carbon nanopolyhedron; Conductive polymer; Sensor; hydrazine
Funding
- National Natural Science Foundation of China [20603014, 21403098]
- Natural Science Foundation of Gansu province [1606RJZA086, 1506RJYA237]
- Fundamental Research Funds for the Central Universities [lzujbky-2016-k09]
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A novel low-cost and highly efficient hydrazine sensor based on nitrogen-doped carbon nanopolyhedra (CNP), Prussian blue (PB) and conductive polymer is synthesized. CNP containing cobalt, which were prepared via pyrolysis of the Zeolitic Imidazole Framework67 (ZIF-67), are found to be catalytically active for the synthesis of PB. Polypyrrole (PPy) is then coated on the PB/CNP composite to provide high conductivity and an environmental stability of the PB/CNP/PPy compound. The as-prepared electrode was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and electrochemical methods. The electrode modified with PB/CNP/PPy exhibits an excellent activity for the electrocatalytic oxidation of hydrazine. It demonstrated a rapid response of less 2 s, a sensitivity of 0.22 A M-1, a long linear range from 7.5 x 10(-7) M to 1.7 x 10(-3) M and a low detection limit (S/N = 3) of 2.9 x 10(-7) M, as well as a remarkable stability and selectivity. (C) 2017 Elsevier B. V. All rights reserved.
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