论文部分内容阅读
采用水热法制备了ZnO纳米棒。采用琼脂稀释法研究商业纳米ZnO颗粒和水热法制备纳米ZnO棒对大肠杆菌抑菌作用的差异性。利用透射电镜、X射线衍射仪、比表面积测试仪、对大肠杆菌最小抑菌浓度进行表征。结果表明:ZnO纳米棒的粒径(约96 nm)比商业颗粒纳米ZnO(约185 nm)要小的多,ZnO纳米棒衍射峰宽值相对于商业ZnO纳米颗粒的要更宽,晶粒度更小(根据谢乐公式ZnO为98.203l nm,商业ZnO为189.3206,nm);.ZnO纳米棒(5.4759 m~2/m)的比表面积比商业ZnO纳米颗粒(3.6081 m~2/g)的更大,依据抗菌性原理,这两种指标皆表明ZnO纳米棒的抗菌性能相对较好,在最小抑菌浓度试验中,商业氧化锌纳米颗粒和水热法制备氧化锌纳米棒的最小抑菌浓度分别为0.22%和0.12%;ZnO纳米棒对大肠杆菌的抑制作用高于商业ZnO纳米颗粒对其的抑制作用。
ZnO nanorods were prepared by hydrothermal method. The agar dilution method was used to study the difference of bacteriostasis between Escherichia coli and commercial nano-ZnO particles by hydrothermal method. The minimum inhibitory concentration of Escherichia coli was characterized by transmission electron microscopy, X-ray diffraction and specific surface area tester. The results show that the size of ZnO nanorods (about 96 nm) is much smaller than that of commercial ZnO nanoparticles (about 185 nm). The diffraction peak width of ZnO nanorods is wider than that of commercial ZnO nanoparticles, and the grain size Smaller than that of commercial ZnO nanoparticles (98.203l nm and 189.3206 nm nm for commercial ZnO). The specific surface area of ZnO nanorods (5.4759 m ~ 2 / m) was higher than that of commercial ZnO nanoparticles (3.6081 m ~ 2 / g) Larger, based on the principle of antibacterial, these two indicators show that the antibacterial properties of ZnO nanorods is relatively good, in the minimum inhibitory concentration test, commercial zinc oxide nanoparticles and hydrothermal method to prepare the minimum inhibitory effect of zinc oxide nanorods The concentrations of ZnO nanorods were 0.22% and 0.12%, respectively. The inhibitory effect of ZnO nanorods on Escherichia coli was higher than that of commercial ZnO nanoparticles.