Highly Sensitive Amperometric Hydrazine Sensor Based on Novel Sb2S3-CuTβPc Composite Modified Platinum Disk Electrode

A novel composite material composed of inorganic semiconductor antimony sulphide (Sb2S3) and organic semiconductor copper tetra-β-(4-carboxyphenoxy) phthalocyanine (CuTβPc) was prepared by a simple solution deposition process. The crystallite structure and properties of Sb2S3-CuTβPc composites were analyzed by XRD, SEM, FTIR and UV–vis. The electrochemical behavior of the sensor was investigated using cyclic voltammetry (CV) and amperometry. For the development of a potential chemical sensor, Sb2S3-CuTβPc composites were deposited on flat platinum disk electrodes to give sensors that responded quickly and selectively to hydrazine in phosphate buffer phase. The hydrazine sensor showed a linear detection range from 10 nM to 0.5 µM and detection limit of 0.9 nM at a signal-to-noise ratio of 3. Thus this novel composite may be potentially applied in the field of catalysis and environment.