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, a...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 d001 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.展开更多
基金Funded by the National Natural Science Foundation of China (Nos. 20676049, 20871058 and 20971028)the Foundation of Enter-prise-University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China (Nos. 2007B090400105 and2008A010500005)the Open Fundation of Guangdong Provincial Key Laboratory of Applied Microbiology (No. SWKF200704)
文摘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 d001 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.
