石墨烯/锌铁氧体复合物的制备及抗菌性能

用氧化还原法和化学共沉淀法分别制备了石墨烯(GE)和石墨烯/锌铁氧体(GE/ZnFe2O4)复合物,通过现代测试技术表征了样品的物相结构、组成和微观形貌.以大肠杆菌、金黄色葡萄球菌和白色念珠菌为测试菌种,分别对样品的抗菌性能进行了研究.结果表明,样品的抗菌活性受GE/ZnFe2O4复合物中GE和ZnFe2O4质量比(mG/Z)以及菌种的影响,其中mG/Z=0.4的复合物对三种菌均有较好的抗菌效果,其最小抑菌浓度分别为25、25和12.5μg/mL;复合物对白色念珠菌的抗菌效果最好,这与菌种的结构有关.此外,对样品的抗菌机理进行了详细研究.

Preparation and antibacterial property of graphene/zinc ferrite composites

Graphene（GE） and graphene/zinc ferrite（GE/ZnFe2O4） composites were prepared by means of oxidation-reduction and chemical coprecipitation methods. The phase structures, compositions and morphologies of the samples were characterized by the modern testing technologies. The antibacterial properties of the samples on Escherichia coli, Staphylococcus aureus and Candida albicans were studied. The results show that the antibacterial activities of the samples are influenced by the mass ratio of GE to ZnFe2O4（mG/Z） of the GE/ZnFe2O4 composite and strain. In which, the composite with mG/Z = 0.4 has the best antibacterial activity; its minimal inhibitory concentrations are 25, 25 and 12.5 μg/mL on the three stains, respectively. Each composite has best antibacterial effect on Candida albicans, related to the structure of the strain. Moreover, the antibacterial mechanisms of the samples were discussed further.