Structure and antibacterial activity of newlayered perovskite compounds

来源期刊:中国有色金属学报(英文版)2007年第2期

论文作者:谭绍早 张力玲 夏燎原 刘应亮 李笃信

文章页码:257 - 257

Key words:layered perovskite compound; structure; antibacterial activity; ion-exchange

Abstract: New layered perovskite compounds, AgxNa2-xLa2Ti3O10 (x=0.2, 0.3 and 0.5) were synthesized by an ion-exchange reaction of Na2La2Ti3O10 with AgNO3 solution and characterized by energy dispersive X-ray analysis(EDX), X-ray diffractometry(XRD), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy(XPS). The ion-exchange processes were optimized, and the antibacterial activity, light permanency and water-resistance were evaluated. Surprisedly, no significant changes in crystal structure of Na2La2Ti3O10 are found by the exchange of silver ions. The Ag0.3Na1.7La2Ti3O10 particles conglomerate obviously with irregular shape and size. Ag0.3Na1.7La2Ti3O10, possessing the minimum inhibitory concentrations(MICs) against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) of 180 mg/L and 240 mg/L, has high antibacterial activity, good light permanency and water-resistance. The ionic state silver in AgxNa2-xLa2Ti3O10 is the antibacterial active component.

基金信息:the National Natural Science Foundation of China
the Natural Science Foundation of Guangdong Province of Chin
the Science and Technology Project Fund of Guangzhou City of China

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