Controllable preparation of nano-MgO and investigation of its bactericidal properties
Controllable preparation of nano-MgO and investigation of its bactericidal properties
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DOI：
10.1016/j.jinorgbio.2004.12.022
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发表时间：
2005-05-01
影响因子：
3.9
通讯作者：
Duan, X
中科院分区：
文献类型：
--
作者：
Huang, L;Li, DQ;Duan, X
以Mg（NO3）（2）（.）以6 H（2）O、Na 2CO 3、尿素和氨为原料，通过X射线衍射（XRD）、透射电子显微镜（TEM）、低温N2吸附-脱附测量和FT-IR光谱进行表征。用枯草芽孢杆菌变种进行杀菌实验。以金黄色葡萄球菌（Staphylocococeus aureus）和黑曲霉（尼日尔）为实验菌，研究了纳米氧化镁的杀菌机理。结果表明，纳米氧化镁的杀菌效果随粒径的减小而增强。将样品的杀菌效果与常见的光活性杀菌材料TiO 2的杀菌效果进行比较。纳米氧化镁无论是直接使用还是作为内墙涂料的添加剂，都具有较好的杀菌活性。此外，纳米MgO即使在没有辐照的情况下也是活性的。(c)2005年爱思唯尔公司All rights reserved.
Samples of nano-MgO with varying particle sizes were prepared by four different methods using Mg(NO3)(2) (.) 6H(2)O, Na2CO3, urea and ammonia as raw materials and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), low temperature N-2 adsorption-desorption measurements and FT-IR spectroscopy. Bactericidal experiments with Bacillus subtilis var. niger and Staphylococeus aureus were carried out using as-synthesized nano-MgO samples and the bactericidal mechanism was also investigated. The results showed that the bactericidal efficacy of nano-MgO increases with decreasing particle size. The bactericidal efficacy of the samples was compared with that of TiO2, a common photoactive bactericidal material. The nano-MgO has better bactericidal activity, both when used directly and as an additive in an interior wall paint. Furthermore, nano-MgO is active even in the absence of irradiation. (c) 2005 Elsevier Inc. All rights reserved.