Extension of the Optical Absorption Range in Zn-Doped MgO Powders and Its Effect on Antibacterial Activity
Extension of the Optical Absorption Range in Zn-Doped MgO Powders and Its Effect on Antibacterial Activity
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DOI：
10.1007/s11665-009-9490-y
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发表时间：
2010-04
影响因子：
2.3
通讯作者：
T. Ohira;M. Kawamura;M. Fukuda;Kelly Alvarez;B. Özkal;O. Yamamoto
中科院分区：
文献类型：
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作者：
T. Ohira;M. Kawamura;M. Fukuda;Kelly Alvarez;B. Özkal;O. Yamamoto
为了生产 Zn 掺杂 MgO 粉末样品，将前体 MgO 和 ZnO 以高于 1.86 的摩尔比混合，然后在空气气氛中于 1200°C 下处理 5 小时。随着MgO中Zn含量的增加，晶格常数线性增加，并且在200至400 nm波长范围内光吸收强度增加。使用大肠杆菌和金黄色葡萄球菌通过菌落计数法检查所得粉末样品的抗菌活性。抗菌试验发现，随着MgO中Zn含量的增加，抗菌活性增强。对S的抗菌作用。金黄色葡萄球菌比E的更大。大肠杆菌，与 MgO 中的 Zn 含量无关。从这些结果来看，抗菌活性的增强可能与Zn掺杂MgO的光吸收有关。
In order to produce powder samples of Zn-doped MgO, the precursors, MgO and ZnO, were mixed in a molar ratio higher than 1.86 and subsequently treated at 1200 °C for 5 h in air atmosphere. With increasing Zn content in MgO, the lattice constant increased linearly, and the optical absorption intensity increased in the wavelength ranging from 200 to 400 nm. Antibacterial activity of the obtained powder samples was examined by colony count method usingEscherichia coliandStaphylococcus aureus. In the antibacterial tests, it was found that the antibacterial activity enhanced with increasing Zn content in MgO. Antibacterial action towardS. aureuswas greater than that towardE. coli, irrespective of the Zn content in MgO. From these results, the enhancement of the antibacterial activity could be related with the optical absorption of Zn-doped MgO.