Abstract
Efficient rice-shaped polyaniline@bismuth oxide (PANI@Bi2O3) nanocomposites were synthesized by in situ sol-gel method. The sol of polyaniline was added to the gel of Bi2O3 in different mixing volume ratios of inorganic reactant and with a fixed mixing volume ratio, i.e., 1:1, of organic polymer. The physicochemical characterization was carried out by SEM, XRD, FTIR, UV-Vis and simultaneous TGA studies. PANI@Bi2O3 were deposited on a silver electrode (AgE, surface area, 0.0216 cm(2)) to give an efficient sensor with a fast response toward the toxic 3-methoxy phenol in liquid phase. The calibration plot is linear (r (2) = 0.9809) over the 0.09 nM to 0.09 mM 3-methoxy phenol concentration ranges. The sensitivity is similar to 0.8796 A mu Acm(-2) A mu M-1, and the detection limit is 0.016 +/- A 0.002 nM (signal-to-noise ratio, at a SNR of 3), which leads to a promising future sensitive sensor development using organic-inorganic nanocomposites by reliable I-V method for the potential applications of hazardous phenolic compounds in environmental and healthcare fields.
Schematic diagram for the synthesis of rice-shaped polyaniline@Bi2O3 nanocomposite.
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