Abstract
A novel hydrazine electrochemical sensor with superior sensing capabilities was fabricated by using electrodepositing gold nanoparticles (AuNPs) on the surface of MIL-53 (Fe, Ni) MOFs–derived nanostructures on nickel foam (NF) supporter by solvothermal method. The crystal phase, morphology structure, surface elemental composition and chemical state of AuNPs decorated NiFe2O4/NF products were studied using different characteristic techniques. To improve the electrochemical performances, various parameters of the AuNPs@NiFe2O4/NF sensor were systematically optimized to encompass the reaction time, deposition content of Au NPs and PBS solution pH. Our results demonstrate that the as-fabricated electrochemical sensor based on Au90NPs@NiFe2O4/NF presents excellent electrochemical performances, which includes high sensitivity with 9220 μA·mM−1·cm−2, a wide linear range of 0.3–150 μM and within a low detection limit (LOD) of 0.05 μM, good selectivity as well as reliable stability and reproducibility. Meanwhile, it is feasible to apply the developed Au90NPs@NiFe2O4/NF sensor for highly sensitive hydrazine detection in the tap water with recoveries between 97.2 and 104.2%. The measured RSD is less than 2.77%, which exhibits high potential for the sensor’s practical applications.
Published Version
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