Biotechnology
Huda N. Abid; Amar Al-Keisy; Duha S. Ahmed; Sangeeta Singh
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 ...
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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.
Biotechnology
Noor Ali; Ali Taha; Duha S. Ahmed
Abstract
In the present study, the synthesized Multi-Walled Carbon Nanotubes (MWCNTs) were chemically treated with a mixture of acids to produce functionalized MWNTs. The functionalized MWCNTs were characterized by X-Ray Diffraction Analysis (XRD), Zeta potential and Field-Emission Scanning Electron Microscopy ...
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In the present study, the synthesized Multi-Walled Carbon Nanotubes (MWCNTs) were chemically treated with a mixture of acids to produce functionalized MWNTs. The functionalized MWCNTs were characterized by X-Ray Diffraction Analysis (XRD), Zeta potential and Field-Emission Scanning Electron Microscopy (FE-SEM). The X-ray diffraction reveals the MWCNTs average crystal size of the R-MWCNTs and F-MWCNTs were about (3.27 and 3.19) nm, respectively. FESEM images show the formation of R-MWCNTs that appears as cylindrical tubes and aggregated tubes with each other, while the F-MWCNTs appear as less aggregated and tangled clusters than R-MWCNTs. Zeta potential measurements showed that the measurement of the R-MWCNT shows a low negative value -9 mV and F-MWCNT, it was found that the zeta potential value is up to -29 mV. The antibacterial activity was studied against E. coli and P. aeruginosa bacteria, and indicated the highest growth inhibition zones (IZ) of F-MWCNTs as compared with R- MWCNTs against E. coli and Pseudomonas aeruginosa, respectively.
