The antibacterial properties of nano ZnMoO4 powder

ZnMoO4 nanoparticles with two different morphologies were successfully synthesized by the industrial dry method. Both nano-ZnMoO4 belong to alpha crystalline phase, and the valence state of Mo was verified to be + 6. The polyhedral-shaped particles and a mixture of polyhedral and rod-shaped particles exists, respectively. The average size of ZnMoO4 nanoparticles with polyhedral structure was 50 nm in diameter, while the diameter of the cross-section of ZnMoO4 nanoparticles (NPs) with rod-like structure was less than 50 nm. To evaluate the antibacterial properties of two materials, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of two kinds of nano-ZnMoO4 against staphylococcus aureus were determined using an agar medium. The results showed that the MIC and MBC values of polyhedral nano-ZnMoO4 were 20 ppm and 40 ppm; the MIC and MBC values of rod-shaped and polyhedral hybrid nano-ZnMoO4 were 10 ppm and 20 ppm, respectively. The antibacterial effect of both nanoparticles was better than that of conventional ZnMoO4 with the size above 1 mu m at the concentration of 200 ppm. This confirms the crystalline structure in relation to the crystal size/morphology and the concentration of powder in suspension can influence on the antibacterial efficiency. Furthermore, these two shaped nano-ZnMoO4 samples had different atomic percentages, so different spatial hinge structures were the important reason for the unequal antibacterial performance of these shaped nano-ZnMoO4 powder.

Automated summary

ZnMoO4 nanoparticles of different morphologies were synthesized using the industrial dry method. Both nanoparticles showed better antibacterial properties compared to conventional ZnMoO4 with larger crystal size. The structure, size, and concentration of the nanoparticles influenced their antibacterial efficiency.