Impact of MnO2 on the optical electrical and antibacterial characteristics of Graphite/Polyaniline Ternary composites

• Published in: Journal of materials science. Materials in electronics 2022-03, Vol.33 (9), p.7227-7235
• Main Authors: Jayamurugan, P., Deivanayaki, S., Ashokan, S., Krishnan, V. Gopala, Rao, N. V. S. S. Seshagiri, Chandrasekaran, J., Massoud, Ehab El Sayed
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Optical and Electronic Materials
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-07902-w

In this work, Graphite/polyaniline composites with different weight percentages of MnO 2 were synthesized at room temperature by a chemical polymerization process. To study the influence of MnO 2 on the electrical, optical, structural and antibacterial activity of the fabricated composite samples. The FTIR spectrum shows the presence of MnO 2 in the structure of the composites. The XRD patterns show that the ternary compounds were polycrystalline in nature with an orthorhombic structure of γ-MnO 2 . The I–V properties of the prepared composites were measured by a two-probe method at room temperature. The analysis of the antibacterial activity shows a better result for the compounds with 10% by weight MnO 2 nanoparticles. The UV–visible spectrum shows the absorption band at 293 nm. The calculated band gap energy was found to decrease from 3.31 to 3.10 eV for different weight ratios of MnO 2 . The PL study shows the strong blue emission at ~ 460 nm.