Antibacterial activity of silver-carried sodium zirconium phosphate prepared by ion-exchange reaction
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概要
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Ag^+-Na^+ exchange equilibrium for carrier (sodium zirconium phosphate) was investigated at 60℃, and the chemical compositions and structure of carrier and silver-carried zirconium phosphate (AgZrP) were investigated by EDX and XRD. The silver valence state and antibacterial activity of AgZrP were also studied. The Ag^+ exchange was favorable over the whole Ag^+ concentration range. The molecular formulae of carrier [NaZr_2(PO_4)_3.H_2O] and AgZrP [Ag_<0.5>Na_<0.5>Zr_2(PO_4)_3.H_2O] have been determined, and the silver of AgZrP was in an ionic state. Both carrier and AgZrP displayed hexagonal crystal structures, but Ag^+ exchange resulted in the increase of interplanar spacing and lattice parameter c, and the crystal orientation of AgZrP was affected by the existence of Ag^+. Moreover, 100 mg.l^<-1> of AgZrP possessed high antibacterial activity and was capable of killing all the Escherichia coli and more than 99.9% of the Staphylococcus aureus within 8.0 h of contact. Furthermore, AgZrP showed a broad-spectrum and long-acting antibacterial activity.
- 社団法人日本セラミックス協会の論文
- 2008-06-01
著者
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Liu Yingliang
Department Of Chemistry Jinan University
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Tan Shaozao
Department Of Chemistry Jinan University
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Zhang Liling
Department Of Chemistry Jinan University
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SHI Qingshan
Guangdong Institute of Microbiology
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OUYANG Yousheng
Guangdong Institute of Microbiology
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CHEN Yiben
Guangdong Institute of Microbiology
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