Enhancement of the antimicrobial properties of orthorhombic molybdenum trioxide by thermal induced fracturing of the hydrates.
Enhancement of the antimicrobial properties of orthorhombic molybdenum trioxide by thermal induced fracturing of the hydrates.
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DOI：
10.1016/j.msec.2015.09.069
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Shafaei;Daniel Van Opdenbosch;T. Fey;M. Koch;T. Kraus;J. Guggenbichler;C. Zollfrank
中科院分区：
文献类型：
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作者：
S. Shafaei;Daniel Van Opdenbosch;T. Fey;M. Koch;T. Kraus;J. Guggenbichler;C. Zollfrank
过渡金属钼的氧化物具有优异的抗菌性能。采用酸化法制备了MoO_3×Mo2H_2O(MoO_3×Mo_2H_2O)，研究了从25℃到600℃的焙烧过程中和焙烧后的热相发展和形貌演变。对金黄色葡萄球菌、大肠埃希菌和铜绿假单胞菌进行了微生物滚动试验，对具有正交晶格对称性和大比表面积的无水样品进行了优异的抗菌活性测定。比表面积的增加是由于裂纹的形成和300℃焙烧后水合物水的损失。结果支持提出的过渡金属氧化物的抗菌机理，这是基于比表面积增加导致局部酸度增加的结果。
The oxides of the transition metal molybdenum exhibit excellent antimicrobial properties. We present the preparation of molybdenum trioxide dihydrate (MoO3× 2H2O) by an acidification method and demonstrate the thermal phase development and morphological evolution during and after calcination from 25 °C to 600 °C. The thermal dehydration of the material was found to proceed in two steps. Microbiological roll-on tests using Staphylococcus aureus,Escherichia coliand Pseudomonasaeruginosawere performed and exceptional antimicrobial activities were determined for anhydrous samples with orthorhombic lattice symmetry and a large specific surface area. The increase in the specific surface area is due to crack formation and to the loss of the hydrate water after calcination at 300 °C. The results support the proposed antimicrobial mechanism for transition metal oxides, which based on a local acidity increase as a consequence of the augmented specific surface area.