A Sol-gel Derived Surface Modified CuHCF Nanoparticles Carbon Ceramic Composite Electrode and Its Application for Hydrazine Determination
نویسندگان
چکیده
An amperometric sensor for hydrazine determination was developed using a surface modified copper (II) hexacyanoferrate (CuHCF) nanoparticles carbon ceramic composite electrode (CCE) by a versatile sol-gel technique using aminopropyl trimethoxy silane (APTMOS). The characterization of the modified electrode has been carried out by electrochemical techniques such as cyclic voltammetry, hydrodynamic voltammetry and Chronoamperometry. The cyclic voltammograms of the modified CuHCF nanoparticlesCCE prepared under optimum composition, showed a well-defined one-electron redox couple due to Fe(CN)64?/Fe(CN)63? system with the formal potential of 0.68V (vs. SCE). This modified electrode exhibited electrocatalytic activity towards the oxidation of hydrazine at a reduced over potential with good sensitivity of 0.738 μA/μM in the wide concentration range 1.3 x 10-7 to 6.5 x 10-3 M and with a detection limit of 4.3 x 10?8 M. The proposed modified electrode exhibited the advantage of simple preparation, fast response, good stability and reproducibility for hydrazine determination. This modified electrode was successfully applied to the determination of hydrazine in boiler water samples and acceptable results were obtained.
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