Dual functional In2O3-PANI-PEDOT Hybrid for Sensing Gallic Acid and Photocatalytic Degradation of Methylene Blue
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In this study, we have investigated the electrocatalytic properties of a nanohybrid composed of In 2 O 3 nanoparticles and a copolymer of PEDOT-PANI. In 2 O 3 nanoparticles, synthesized at 20 and 50 nm sizes, were combined with PANI-PEDOT to form a nanocomposite. The electrocatalytic activity of the nanohybrid was evaluated through catalytic studies using gallic acid (GA) as a model analyte and employing differential pulse voltammetry (DPV). The modified glassy carbon electrode (GCE) exhibited linear responses towards GA in the concentration range of 0.2×10 −8 to 1.2×10 −9 M, with a sensitivity of 3.102 µA/µM cm −2 . The detection limit (DL) and quantification limit (QL) were determined to be 1.108×10 -9 and 2.1810×10 -9 M µA-1, respectively, indicating the suitability of the nanohybrid for electrochemical sensing applications. Additionally, the nanocomposite demonstrated promising photocatalytic activity, with a maximum efficiency of 98.9% towards methylene blue (MB) degradation within 60 minutes. The interference of reactive hydroxide ions (OH o ) formed during the degradation process was observed but did not significantly affect the overall performance. This study highlights the potential of In 2 O 3 -PANI-PEDOT nanocomposite for use in electrochemical sensing and photocatalytic applications, with opportunities for further optimization and development of hybrids.
