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Journal of Polymer & Composites Original Research Special issue

Green Synthesis and Functional Evaluation of Ag–Polypyrrole/TeO2 Nanocomposites for Advanced Electronic Applications

  1. Kusuma D. Research Centre-Department of Chemistry, PES Institute of Technology Bangalore South Campus (PESIT–BSC), Bengaluru
  2. Revanasiddappa M. Department of Chemistry, PES University - Electronic City campus, Bengaluru
  3. Raghavendra N. Research Centre-Department of Chemistry, East West Institute of Technology, Bengaluru
  4. Y.T. Ravikiran Y.T. Department of Physics, Government First Grade College, Holalkere
  5. Leela Kumar K. Department of Mechanical Engineering, Vignan’s Institute of Information Technology (A), Besides VSEZ, Vadlapudi Duvvada, Visakhapatnam
  6. Swathi G. Department of Physics, Aditya Institute of Technology and Management (A), Tekkali, Srikakulam

Abstract

Ag–PPy/TeO₂ nanocomposites with TeO₂ loadings ranging from 2% to 10% were synthesized using an in-situ chemical polymerization method. Green tea extract, rich in phytochemicals, acted as both a reducing and stabilizing agent to facilitate the formation of metal oxide nanoparticles. The structural and morphological characteristics of the nanocomposites were analyzed using FTIR, PXRD, and SEM techniques. FTIR confirmed the successful integration of Ag, TeO₂, and PPy functional groups. PXRD patterns indicated the crystalline nature of the composites, while SEM and EDX analyses verified uniform particle distribution and elemental composition. Electrical studies demonstrated significantly enhanced AC conductivity in all TeO₂-containing composites compared to pure Ag-decorated PPy. The improvement in charge transport with increasing TeO₂ content highlights the material’s suitability for real-time sensing. Humidity-sensing evaluation revealed that the composite containing 6% TeO₂ exhibited superior response characteristics, making it the most promising candidate for practical sensor applications. Moreover, the excellent electrical behaviour of the developed composites suggests their potential for next-generation electronic and EMI-shielding devices.

Keywords

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