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] 作者單位： Guangdong Institute of Microbiology, Guangzhou 510070, ChinaDepartment of Chemistry, Jinan University, Guang1zhou 510632, China 期 刊： 稀土學(xué)報(bào)（英文版）   ISTICEISCI Journal： JOURNAL OF RARE EARTHS 年，卷(期)： 2009, 27(5) 分類號： Keywords： Ce~(3+) exchanged montmodllortite    chemical composition    microstructure    antibacterial activity    rare earths    機(jī)標(biāo)分類號： U R97 機(jī)標(biāo)關(guān)鍵詞： 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 基金項(xiàng)目： 國家自然科學(xué)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

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