Sensitive electrochemical sensor for hydrazine based on in situ synthesis of Cu3(BTC)2/GO nanocomposite

A new hydrazine electrochemical sensor was fabricated based on in situ synthesis of Cu-3(BTC)(2)/GO nanocomposite. Cu-3(BTC)(2)/GO composite were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectrometry (FT-IR). Meanwhile, the electrochemical behaviors of hydrazine on the Cu-3(BTC)(2)/GO/GCE were studied by cyclic voltammetry and linear sweep voltammetry. Under the optimized conditions, Cu-3(BTC)(2)/GO/GCE had enhanced electrocatalytic activity toward hydrazine due to synergic catalytic effect between Cu-3(BTC)(2) and GO. The electrochemical sensor exhibited a wider linear range (1.0 mu M to 5000 mu M) and a lower detection limit (0.5 mu M) as well as good reproducibility and stability. The proposed sensor has also been used for the determination of hydrazine in tap water with satisfactory results.