Preparation, characterization and antibacterial properties of ZnO/kaoline nanocomposites
Language English Country Switzerland Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25909474
DOI
10.1016/j.jphotobiol.2015.03.034
PII: S1011-1344(15)00119-0
Knihovny.cz E-resources
- MeSH
- Anti-Bacterial Agents chemistry pharmacology MeSH
- X-Ray Diffraction MeSH
- Enterococcus faecalis drug effects MeSH
- Escherichia coli drug effects MeSH
- Kaolin chemistry MeSH
- Catalysis MeSH
- Nanocomposites chemistry ultrastructure MeSH
- Zinc Oxide chemistry MeSH
- Pseudomonas aeruginosa drug effects MeSH
- Staphylococcus aureus drug effects MeSH
- Light MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Anti-Bacterial Agents MeSH
- Kaolin MeSH
- Zinc Oxide MeSH
This paper describes laboratory preparation, characterization and antibacterial activity testing of ZnO/kaoline composites. ZnO/kaoline composites with 50 wt.% of ZnO were laboratory prepared, dried at 105 °C and calcined at 500 °C. XRPD analysis revealed that thermal treatment caused the phase transformation of Zn containing precursor into ZnO. Scanning and transmission electron microscopy techniques were used for characterization of morphology of the prepared samples. A standard microdilution test was used for evaluation of antibacterial activity using four common human pathogens (Staphylococcus aureus, Escherichia coli, Enterococcus faecalis and Pseudomonas aeruginosa). Daylight was used for induction photocatalytically based antibacterial activity. Second possible explanation of antibacterial activity of ZnO/kaoline could be the presence of biologically available forms of zinc. During the antibacterial activity assays the ZnO/kaoline composites exhibited antibacterial activity, where differences in an onset of the antibacterial activity and activity against bacterial strains were observed. The highest antibacterial activity was observed against S. aureus, where the lowest value of minimum inhibitory concentration was determined equal to 0.41 mg/ml.
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