Document Type : Regular Article

Authors

• Huda N. Abid ¹
• Amar Al-Keisy ²
• Duha S. Ahmed ¹
• Sangeeta Singh ³

¹ Department of Applied Sciences, University of Technology – Iraq

² Nanotechnology and Advanced Materials Research Center, University of Technology – Iraq

³ Microelectronics Lab, National Institute of Technology – India

Abstract

Recently, bi-based photocatalysts have begun to be used in biological applications. However, the antibacterial ability of a Bi-based photocatalyst is still unclear. In this study, Bi₂MoO₆ and Bi₂WO₆ were successfully synthesised by a hydrothermal approach. The fabricated samples were characterised by X-ray diffraction, FESEM, and UV-Vis spectra. Besides, the antibacterial activity of both photocatalyst samples toward E. coli as unfavourable and S. aureus as positive pathogens were studied. Compared with the antibacterial of Bi₂WO₆, the resultant Bi₂MoO₆ exhibited high susceptibility to S. aureus bacterial strain, revealing large zones of 24 mm to 29 mm. Bi₂WO₆ exhibited less susceptibility of 17.5 mm to 21.5 mm compared with the zone of inhibition against tested bacterial E. coli. Besides, a possible mechanism suggested the effect of the nanosheet structure of samples to penetrate the cell membrane, which results in leakage of interior cell and complete death, and these results will provide some support for the applications of Bi₂MoO₆ and Bi₂WO₆ in antibacterial materials under typical environments.

Keywords

• Bi-based photocatalysts
• Hydrothermal approach
• Nanosheets structure
• Growth inhibition zone

Main Subjects

• Biotechnology