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Structure and antibacterial activity of Ce~(3+) exchanged montmorillonites
Abstract：Four kinds of Ce~(3+) 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 micros-copy (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 con-tents of Ce/MMTs, the special surface areas were decreased, but the total pore volumes and the average pore sizes were increased. The anti-bacterial activity of Ce/MMTs is increased with increasing the cerium contents, and 1.5g/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 dis-played bactericidal activity. 作者： Author： OUYANG Yousheng[1] XIE Yushan[2] TAN Shaozao[2] SHI Qingshan[1] CHEN Yiben[1] 作者单位： Guangdong Institute of Microbiology, Guangzhou 510070, ChinaDepartment of Chemistry, Jinan University, Guang1zhou 510632, China 期 刊： 稀土学报（英文版） ISTICEISCI Journal： JOURNAL OF RARE EARTHS 年，卷(期)： 2009, 27(5) 分类号： Keywords： Ce~(3+) exchanged montmodllortite chemical composition microstructure antibacterial activity rare earths 机标分类号： U R97 机标关键词： antibacterial activity Staphylococcus aureus surface properties energy dispersive Escherichia coli X-ray surface areas pore sizes difference analysis special total Four XRD XPS SEM EDX 基金项目： 国家自然科学基金，the Foundation of Enterprise-University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China，the Natural Science Foundation of Guangdong Province of China，the Open Foundation of Guangdong Provincial Key Laboratory of Applied Microbiology【Structure and antibacterial activity】相关文章：
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