Sensitive electrochemical detection of hydrazine based on hollow core-satellite hZnS@Au nanoparticles

New strategies of hollow nanoparticles fabrication are of fundamental significance in synthesizing varieties of nanoparticles with certain property. A novel etching reaction has been established to synthesize hollow ZnS (hZnS) happening in the branched polyethyleneimine (bPEI) and 1,4-dibromobutane mixed solution dissolved in ethanol heated at 80 degrees C. Besides, the etching reaction was extended to the synthesis of hollow ZnS decorated with gold nanoparticles (hZnS@Au) where HAuCl4 as gold precursor. The synthesized core-satellite hZnS@Au with high specific surfaces, uniform morphology and chemically reactive facets was used for the detection of hydrazine. It was worth pointing that the resulting electrochemical sensor exhibited good performance toward hydrazine oxidation with ultra-wide linear response ranging from 2 mu M to 24.22 mM (R-2 = 0.994) at 0.7 V and low limit of detection of 0.667 mu M at a signal-to-noise of 3. (C) 2016 Elsevier B.V. All rights reserved.