Poly(thiophene-3-acetic acid)-palladium nanoparticle composite modified electrodes for supersensitive determination of hydrazine |
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Authors: | Ou Zhang Hong-mei Yu Li-min Lu Yang-ping Wen Xue-min Duan Jing-kun Xu |
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Affiliation: | 1. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China ;School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China 2. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China 3. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China |
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Abstract: | A promising electrochemical sensor was fabricated by electrodeposition of Pd nanoparticles (PdNPs) on poly(thiophene-3-acetic acid) (PTAA)-modified glassy carbon electrode (GCE), forming a PdNPs/PTAA composites-modified GCE (PdNPs/PTAA/GCE). Scanning electron microscope (SEM) and electrochemical techniques were used for the characterization of these composites. It was found that the PdNPs/PTAA layer was very uniform. Electrochemical experiments showed that this proposed PdNPs/PTAA composites-modified electrode exhibited excellent electrocatalytic activity towards the oxidation of hydrazine. Under the optimum conditions, the proposed sensor can be applied to the quantification of hydrazine with a wide linear range from 8.0?10-9 mol/L to 1.0?10-5 mol/L with a low detection limit of 2.67?10-9 mol/L. The experiment results also showed that the sensor exhibited good reproducibility and long-term stability, as well as high selectivity with no interference from other potential competing species. |
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Keywords: | Sensor Hydrazine Nanocomposites Pd nanoparticles Conducting polymer |
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