Structure and antibacterial activity of Ce3+ exchanged montmorillonites
来源期刊：Journal of Rare Earths2009年第5期
论文作者：欧阳友生 施庆珊 陈仪本
文章页码：858 - 863
摘 要：Four kinds of Ce3+ exchanged montmorillonites （Ce/MMTs） were prepared by an ion-exchange reaction, and characterized with energy dispersive X-ray analysis （EDX）, X-ray difference （XRD）, X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. The surface properties and antibacterial activity of Ce/MMTs were also investigated. The chemical compositions of Ce/MMTs were determined, and the cerium of Ce/MMTs was confirmed to be present as trivalent cerium state. The d001 basal spacings of Ce/MMTs were enlarged with the enhancement of the cerium contents, and the particles were formed with irregular shape. On increasing the Ce contents of Ce/MMTs, the special surface areas were decreased, but the total pore volumes and the average pore sizes were increased. The antibacterial activity of Ce/MMTs is increased with increasing the cerium contents, and 1.5 g/L of Ce/MMT-3 containing 11.46wt.% of curium could remove all the Staphylococcus aureus and more than 99.9% of the Escherichia coli within 24.0 h of contact. Moreover, Ce/MMTs displayed bactericidal activity.
欧阳友生1，施庆珊1，陈仪本1
1. Guangdong Institute of Microbiology
摘 要：Four kinds of Ce3+ exchanged montmorillonites （Ce/MMTs） were prepared by an ion-exchange reaction, and characterized with energy dispersive X-ray analysis （EDX）, X-ray difference （XRD）, X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. The surface properties and antibacterial activity of Ce/MMTs were also investigated. The chemical compositions of Ce/MMTs were determined, and the cerium of Ce/MMTs was confirmed to be present as trivalent cerium state. The d001 basal spacings of Ce/MMTs were enlarged with the enhancement of the cerium contents, and the particles were formed with irregular shape. On increasing the Ce contents of Ce/MMTs, the special surface areas were decreased, but the total pore volumes and the average pore sizes were increased. The antibacterial activity of Ce/MMTs is increased with increasing the cerium contents, and 1.5 g/L of Ce/MMT-3 containing 11.46wt.% of curium could remove all the Staphylococcus aureus and more than 99.9% of the Escherichia coli within 24.0 h of contact. Moreover, Ce/MMTs displayed bactericidal activity.
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