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- Title
Preparation and antibacterial activity of magnesium oxide nanoplates via sol-gel process.
- Authors
Fan Luo; Junwen Lu; Wei Wang; Fantang Tan; Xueliang Qiao
- Abstract
Magnesium oxide (MgO) nanopowders were synthesised by a sol-gel method with different amounts of ammonium hydroxide (NH3·H2O) and characterised by a combination of thermo gravimetric analysis, X-ray diffraction and transmission electron microscopy. It was found that the structure and morphology of MgO nanopowders can be regulated by the addition of NH3·H2O. When an appropriate amount of NH3·H2O was added into the reaction system, plate-like nanoMgO was obtained. The antibacterial activity of MgO nanoplates was also investigated by the minimum inhibition concentration (MIC) test and bactericidal efficacy against Escherichia coli (E. coli, ATCC 25922). The tested results revealed that the MgO nanoplates have great antibacterial effect with an MIC value of 600 mg/l and the bactericidal rate was about 99.8% at a concentration of 500 mg/l. Furthermore, the effect of NH3·H2O on the structure and morphology of MgO nanopowders and on the growth mechanism are briefly discussed. The hydroxide ion of NH3·H2O, in favour of Mg(OH)2 generation in the precursors, is essential for the formation of MgO nanoplates.
- Subjects
ANTIBACTERIAL agents; MAGNESIUM oxide; SOL-gel processes; AMMONIUM hydroxide; THERMOGRAVIMETRY; X-ray diffraction
- Publication
Micro & Nano Letters (Wiley-Blackwell), 2013, Vol 8, Issue 9, p479
- ISSN
1750-0443
- Publication type
Article
- DOI
10.1049/mnl.2013.0348