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- W4308001886 abstract "Abstract Hybrid composites ZnO/PANI were facily synthesized by a sonication process at room temperature. This procedure is non‐expensive, time/energy saving and environmentally safe. The as‐prepared ZnO/PANI were characterized by FTIR, UV‐vis spectroscopies and SEM in order to investigate the structure and morphology of the studied composites. The samples were used to modify carbon paste electrode (CPE) in order to develop electrochemical biosensors (ZnO/PANI/CPE). The sensing properties of the nanoparticles were evaluated for dopamine, ascorbic acid and uric acid non‐enzymatic detection. The effect of percentage of polyaniline in the composites and the effect of calcination on the biosensor's response were also examined in the present study. It was revealed that the existence of PANI in ZnO/PANI/CPE largely enhanced the electroactive surface area and therefore the sensitivity for electrochemical sensing. A good electrochemical behavior was noted for ZnO/40 wt% PANI‐cal/CPE modified electrode toward DA, AA and UA oxidation. The electroactive surface area of the previously mentioned modified electrode (0.235 cm 2 ) was two times higher than that of the bare electrode (0.117 cm 2 ). The liner relationships between current intensities and concentrations were found to be 0.01–1.4 mM, 0.1–1.3 mM and 0.01–0.12 mM, with detection limit of 0.029 mM, 0.063 mM and 0.007 mM, for DA, AA and UA respectively. In the mixtures of ascorbic acid (AA), dopamine (DA) uric acid (UA) and glucose (Glu) the sensor showed high selectivity of DA with low interference of ascorbic acid by a current change of 14 %. The as‐prepared ZnO/PANI/CPE biosensor displayed a good reproducibility and stability." @default.
- W4308001886 created "2022-11-07" @default.
- W4308001886 creator A5011697817 @default.
- W4308001886 creator A5047541929 @default.
- W4308001886 creator A5058783608 @default.
- W4308001886 date "2022-11-21" @default.
- W4308001886 modified "2023-10-17" @default.
- W4308001886 title "Highly Sensitive Enzyme‐free Sensor Based on a Carbon Paste Electrode Modified with Binary Zinc Oxide/Polyaniline Nanocomposites for Dopamine, Ascorbic Acid and Uric Acid Sensing" @default.
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