Vol. 23 No. 3 (2024): Mapana Journal of Sciences
Research Articles

Improved Photocatalytic and Bacterial Growth Inhibition Properties Realized for PbS/SnO2-rGO Nanocomposite

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  • C Rajashree,
  • AR Balu,
  • K Devendran,
  • M Sriramraj,
  • V Rajamani,
  • N Arunkumar
AR Balu
A Veeriya Vandayar Memorial Sri Pushpam College, Poondi
DOI: https://doi.org/10.12723/mjs.70.5

Published 2024-11-09

Keywords

  • Nanocomposite,
  • Reduced graphene oxide,
  • Heterojunction,
  • Bacterial resistance,
  • Zone of inhibition

Copyright (c) 2024

Creative Commons License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Abstract

PbS/SnO2 (PS) and rGO-PbS/SnO2 (rPS) nanocomposites (NCs) were synthesized through one-pot green synthesis and chemical precipitation methods. In this paper, a comparison of the synthesized composites' photodegradation and bacterial growth inhibition properties has been conducted. For both composites, XRD analyses show the presence of tetragonal-structured SnO2 and cubic-structured PbS peaks. rGO blending increases PS crystallite size from 29 nm to 34 nm. rPS NC shows uniformly packed grains with well-defined boundaries. Absorption peaks of PS redshifts with rGO inclusion. The decreased band gap for rPS might be due to the synergistic effect of sulfur/oxygen vacancies and significant interaction between rGO and PbS/SnO2 NC. The rPS catalyst demonstrated a maximum degradation efficiency of 93% against rhodamine B (RhB) dye. Antibacterial activity of PbS/SnO2 improves with rGO inclusion. PS and rPS NCs are more resistant to gram-positive bacteria than gram-negative bacteria.

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