Abstract
A highly sensitive gold nanoparticles (AuNPs) functionalized hierarchical layered NiCo2O4 nanosheets/NiCo2O4 nanowires (NCSs/NCWs) core–shell structures is proposed toward hydrazine detection using hydrothermal and electrodeposition methods. Various techniques were used to investigate the morphology, crystalline structure and chemical compositions of as-synthesized AuNPs@NCSs/NCWSs sample. The electrochemical performances of the as-prepared hydrazine sensors were evaluated by optimization different experimental parameters including growth time of nanowire and electrodeposition time of AuNPs. The as-proposed AuNPs-180@NCSs/NCWSs hydrazine sensor exhibits excellent electrochemical properties to hydrazine detection, including high sensitivity (14.36 μA·μM−1·cm−2), good linear range (0.8–499.8 μM), low detection limit (0.23 μM) and superior performance for real sample determine, which can be ascribed to the synergistic effects between the NiCo2O4 nanosheets/NiCo2O4 nanowires core–shell arrayed structures and AuNPs. Therefore, the as-synthesized hierarchical layered double NiCo oxide/core–shell nanostructure is a promising candidate for the highly sensitive sensing material of the electrochemical sensor.
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