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The present study was aimed to synthesize polypyrrole coated tin oxide (PPy/SnO 2 ) nanocomposite in order to be effectively used as nanoadsorbent for the removal of Acid Blue 62 anionic dye and antibacterial agent for the disinfection of Gram-positive  Staphylococcus aureus  ( S. aureus ) and gram-negative  Escherichia coli  ( E. coli ) bacteria. The nanoadsorbent was fabricated by the polymerization of pyrrole in the presence of SnO 2  nanoparticles and further characterized using Fourier Transform Infrared, x-ray diffraction, and Field Emission Scanning Electron Microscopy. The adsorption behavior of PPy/SnO 2  nanocomposite for the removal of Acid Blue 62 was studied in a batch system with pH of solution, adsorbate–adsorbent contact time, dose of adsorbent, Acid Blue 62 dye concentration, and temperature considered as the main system parameters. The Langmuir adsorption isotherm was found to have the highest consistency with the equilibrium experimental data rendering maximum adsorption capacity of 75.102 mg g −1 . The disk diffusion tests were applied to evaluate the ability of PPy/SnO 2  for  E. coli  and  S. aureus  eradication; based on the obtained results, it was revealed that PPy/SnO 2  provides exceptional disinfection ability for both bacteria, specifically  S. aureus  (inhibition zone diameter of 21.3 mm).

Polypyrrole coated tin oxide nanocomposite: an efficient dye adsorbent and microbial disinfectant