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Preparation and characterization of antibacterial Zn2+-exchanged montmorillonites

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Abstract

Zn-montmorillonites(Zn-MMTs) as antibacterial compounds were prepared by an ion-exchange reaction. The reaction time, initial pH value and molar ratios of CEC influencing zinc content in Zn-MMTs were investigated, and Zn-MMTs were characterized by means of EDX, XRD, XPS, and SEM. The results of bacterial growth tests were confirmed by determination of the minimum inhibition concentrations (MICs) and minimum bactericidal concentrations (MBCs). The experimental results show that the zinc is confirmed as bivalent zinc state, the d 001 basal spacing of Zn-MMTs is enlarged with the enhancement of the zinc content, and the particles of Zn-MMTs are formed with irregular shape. Moreover, the antibacterial activity of Zn-MMTs increases with increasing the zinc content, and Zn-MMT-3 containing 6.76 mass% of zinc exhibits optimum antibacterial activity against Escherichia coli and Staphylococcus aureus. The intercalated zinc ions act as very effective antibacterial substances in the long term.

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Authors and Affiliations

  1. Guangdong Institute of Microbiology, Guangzhou, 510070, China

    Qingshan Shi  (施庆珊), Yousheng Ouyang & Yiben Chen

  2. Department of Chemistry, Jinan University, Guangzhou, 510632, China

    Shaozao Tan  (谭绍早), Qiuhui Yang & Zepeng Jiao

Authors
  1. Qingshan Shi  (施庆珊)
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  2. Shaozao Tan  (谭绍早)
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  3. Qiuhui Yang
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  4. Zepeng Jiao
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  5. Yousheng Ouyang
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  6. Yiben Chen
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Corresponding author

Correspondence to Shaozao Tan  (谭绍早).

Additional information

Funded by the National Natural Science Foundation of China (Nos. 20676049, 20871058 and 20971028), the Foundation of Enterprise- University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China (Nos. 2007B090400105 and 2008A010500005), and the Open Fundation of Guangdong Provincial Key Laboratory of Applied Microbiology (No. SWKF200704)

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Shi, Q., Tan, S., Yang, Q. et al. Preparation and characterization of antibacterial Zn2+-exchanged montmorillonites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 25, 725–729 (2010). https://doi.org/10.1007/s11595-010-0080-5

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  • DOI: https://doi.org/10.1007/s11595-010-0080-5

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