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The present work is aimed to prepare un-doped and aluminium-bismuth co-doped tin-oxide nanoparticles with 2 weight percentages (each co-dopant 2 wt %) and 4 weight percentages (each 4 wt %) by employing a co-precipitation method. Tetragonal rutile crystal structure of the synthesized materials was confirmed by powder X-ray diffraction, bandgap energy by UV-Vis diffuse reflectance spectral analysis, chemical bonding and the position of O-Sn-O by Fourier transform infrared spectrum and morphology through scanning electron microscopy. The photoluminescence spectrum of synthesized nanoparticles shows emission peaks at 490, 520 and 536 nm. Antibacterial activity of Al-Bi co-doped (4 wt %) SnO 2  nanoparticles shows a higher zone of inhibition in the range of 20–36 mm against  Staphyllococcus aureus , 25–34 against  Bacillus cereus  and 30–41 against  Escherichia Coli  than pure SnO 2  nanoparticles. The developed oxygen vacancies due to the addition of dopants increase the generation of reactive oxygen species which increases the inhibition capability of tin-oxide nanoparticles against various bacterial species.

Pure and Al-Bi Co-doped SnO 2 nanoparticles as bacterial growth inhibitors