ABSTRACT

In the present research, CuO nanopowders with high dispersivity were synthesised using a solution plasma method. The effect of K₂CO₃ as an electrolyte on the phase and morphology of the products was examined. The antibacterial activity was investigated by calculating the diameter of the inhibition zone, minimal inhibitory concentration (MIC), and minimal bactericidal concentration (MBC). The XRD results showed that the sample synthesised at a low concentration of K₂CO₃ had two phases of CuO and Cu(OH)₂, whereas the one prepared at high electrolyte concentrations exhibited copper oxide single phase. The nanoparticles were stable and dispersed up to 10 h in water. The DLS result showed the size distribution starting from 25 to 160 nm, which confirms the powders’ high quality prepared by a solution plasma method. The antibacterial result revealed that the synthesised samples are effective as an antibacterial agent to reduce Pseudomonas aeruginosa and Staphylococcus aureus activity.

摘要

本研究采用溶液等离子体法合成了具有高分散性的CuO纳米粉体。考察了 K ₂ CO ₃作为电解质对产物相和形态的影响。通过计算抑菌圈直径、最小抑菌浓度(MIC)和最小杀菌浓度(MBC)来研究抗菌活性。XRD结果表明，在低浓度K ₂ CO _{3下合成的样品具有CuO和Cu(OH) 2}两相。，而在高电解质浓度下制备的一种表现出氧化铜单相。纳米粒子在水中稳定并分散长达 10 小时。DLS 结果显示从 25 到 160 nm 的尺寸分布，这证实了溶液等离子体法制备的粉末的高质量。抗菌结果表明，合成的样品作为抗菌剂可有效降低铜绿假单胞菌和金黄色葡萄球菌的活性。