Cd_1–xM_xO复合氧化物的制备及抗菌活性

Preparation and Antimicrobial Activity of Cd_1–xM_xO Composite Oxides

摘要: 用溶胶–凝胶法制备了Cd_1–xM_xO复合氧化物(M为Cu、Cr，x = 0.02，0.04，0.06，0.08，0.1)。用XRD、SEM表征了样品的物相结构和形貌。结果表明Cd_1–xM_xO纳米粒子为不规则的六角形貌，晶粒尺寸约为50～80 nm。抗菌测试表明Cd_1–xM_xO对金黄色葡萄球菌、大肠杆菌、白色念珠菌的抗菌活性明显优于纯的CdO。在掺Cu系列中，Cd_0.94Cu_0.06O和Cd_0.94Cu_0.08O样品分别对大肠杆菌和白色念珠菌的抗菌效果最佳；在掺Cr系列样品中，随Cr掺杂浓度增加对金黄色葡萄球菌的抑菌作用增强。

Abstract: Cd_1–xM_xO composite oxides (M = Cu,Cr; x = 0.02,0.04,0.06,0.08,0.10) were prepared by sol-gel method. The X-ray powder diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the crystal structure and morphology of the samples. The results indicated that the Cd_1–xM_xO nanoparticles presented an irregular hexagonal shape and the their size is about 50～80 nm. Antibacterial testing showed that the Cd_1–xM_xO had excellent antibacterial activity than pure CdO against Staphylococcus aureus, Escherichia coli and Candida albicans. The Cd_0.94Cu_0.06O and Cd_0.94Cu_0.08O had the best antibacterial effect on Escherichia coli and Candida albicans in a series of samples doped with Cu, respectively; and the antibacterial activity of samples increased with increase of Cr content in a series of ones doped with Cr.