Abstract：Hydrazine hydrate (N2H4) has a high solubility in water, and it will accumulate in soil, water and organisms for a long time. Human health will be harmed under long-term contact with hydrazine hydrate. Therefore, its detection is very important.The gold nanoparticles were combined with black phosphorus nanosheets by electrostatic attraction to prepare gold/black phosphorus nanocomposite (AuNPs-BPNS). An electrochemical sensor based on this nanocomposite was constructed for the detection of hydrazine hydrate in water samples.The prepared sensor showed good linear relationship with the content of hydrazine hydrate in range of 0.001-2.5 mmol/L.The limit of detection was 0.34 μmol/L.The experimental results showed that the electrochemical sensor based on AuNPs-BPNS had excellent property in the determination of hydrazine hydrate.The proposed method was applied for the determination of hydrazine hydrate in water samples, and the recoveries were between 96.0% and 103.7%.
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