Abstract
It is necessary to efficient detection hydrazine in food. Exploring highly sensitive, low-cost and fast response electrochemical hydrazine sensing methods has been a challenge in this field. In this paper, a conformal transformation method is used to prepare rose flower-like NiCo-LDH derivating from the bimetallic NiCo-MOFs, and the N2H4 sensing platform with a large electrocatalytic area, high conductivity and good stability was constructed. Based on the synergy between Ni and Co and the remarkable catalytic activity of the rough 3D flower-like structure, the N2H4 sensor has a linear response in the concentration range of 0.001-1mmol/L and 1-7mmol/L, with a sensitivity of 5342 μA L mmol-1 cm-2 and 2965 μA L mmol-1 cm-2 (S/N=3), respectively, and low limit of detection of 0.043μmol/L. This study opens a new door for the successful application of electrochemical sensors to detect N2H4 in real food samples.
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