Facile Fabrication of Oxygen-Defective ZnO Nanoplates for Enhanced Photocatalytic Degradation of Methylene Blue and In Vitro Antibacterial Activity

In this study, we examined whether catalysts with many defects have excellent photoactivity. We prepared ZnO nanoplates varying degrees of in a short time 4 h by the crystal growth temperature at 50, 100, 150, and 200 °C under strong alkali NaOH atmosphere 4.0 M. During high-temperature preparation ZnO, were reduced crystallinity was further increased. crystallized systems over 100 °C, rhombic used to control particle shape induce only two axes. The PL, Raman, XPS analyses confirmed presence oxygen vacancies all nanoplates, decreased increasing crystallization temperatures. Methylene blue (MB) dye initially fixed 50 mg/L peak decrease absorption 600–700 nm, confirming its decomposition time. For 5 reaction, MB removal concentration follows following order: ZnO-50 < ZnO-100 ZnO-150 ZnO-200. study confirms that ZnO-200 fewer decompose more quickly. synthesized provided best sterilization performance when tested against gram-positives gram-negatives, Escherichia coli Staphylococcus aureus, respectively. after 3 showed high 96.95% (86.67% dark room) for staphylococcus aureus 95.82% (74.66% irradiated light. Particularly noteworthy is ·OH ·O2− radicals are generated strongly than nanoplates. These results show too-strong rather inhibit antibacterial performance, virtue moderation also exists catalytic activity.