Influence of nano-MgO particle size on bactericidal action against Bacillus subtilis var. niger
Influence of nano-MgO particle size on bactericidal action against Bacillus subtilis var. niger
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DOI：
10.1360/04wb0074
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发表时间：
2005-03-01
影响因子：
--
通讯作者：
Duan, X
中科院分区：
文献类型：
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作者：
Lei, H;Li, DQ;Duan, X
以Mg（NO3）2中心点6 H（2）O、Na 2CO 3、Na 2SO 4、尿素和氨水为反应物，采用不同方法合成了不同粒径的纳米MgO，并对其进行了杀菌实验。尼日尔.并与常用的光催化材料TiO 2的光催化效果进行了比较。通过X射线衍射（XRD）、透射电镜（TEM）、低温N2吸附-脱附测试和红外光谱（FT-IR）等手段对材料进行表征，结果表明：MgO的杀菌能力随粒径的减小而增强。纳米MgO和含有该材料的内墙涂料在有光和无光下的杀菌效果均优于纳米TiO 2。并对杀菌机理进行了讨论。MgO的表面可以产生高浓度的O2，其是高度活性的并且可以与孢子的涂层壁中的肽键反应。孢子因其结构受到破坏而被破坏。
Nano-MgO with various particle sizes, synthesized by different methods using Mg(NO3)(2)center dot 6H(2)O, Na2CO3, Na2SO4, urea and ammonia solution as reactants, was used to carry out bactericidal experiments on Bacillus subtilis var. niger. The results were compared with the effect of TiO2, a common kind of photocatalytic material. The materials were characterized by X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), low temperature N-2 adsorption-desorption measurements and FT-IR, and the results showed that the bactericidal ability of MgO increases with decreasing particle size. Nano-MgO and an interior wall-paint containing the material have better bactericidal effects than nono-TiO2 in both presence and absence of light. The bactericidal mechanism is discussed. The surface of MgO can generate high concentrations of 02 which is highly active and can react with the peptide linkages in the coating walls of the spores. The spores are destroyed by the resulting damage to their structure.