Abstract
Abstract The antibacterial performance of hybrid ZnO particles coupled with a narrow bandgap semiconductor is a research field worthy to explore. WO3/ZnO hybrid particles were prepared by depositing WO3 on pre-synthesized ZnO particles via liquid impregnation method. The hybrid particles were mainly wurtzite ZnO. FESEM showed that the ZnO particles have rod-like structures. Tiny nanoparticles were formed on the surface of ZnO particles particularly after immersing in a high concentration of sodium tungstate. The presence of W in WO3/ZnO hybrid particles was verified by TEM/EDX mapping. WO3 appeared in the forms of porous layer on the surface of ZnO particles. The antibacterial susceptibility assay demonstrated that WO3/ZnO hybrid particles exhibited better inhibition effect against Gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) than Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa). Interestingly, the Escherichia coli demonstrated inhibitory growth to WO3 (or W3+ ions).
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