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锌-铈/沸石复合抗菌剂的制备及表征 被引量:1

Preparation and Characterization of Zeolite Composite Antibacterial Agents Carrying Zinc and Cerium
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摘要 采用离子交换法将锌离子和铈离子交换至13x沸石中得到新型复合抗菌剂,通过EDX、XRD和XPS分析它们的组成结构,并测试了它们的抗菌活性。研究结果发现:Ce3+对13x沸石中Na+的交换能力要明显大于Zn2+;离子交换反应对沸石的晶体结构没有明显影响,但使它的晶面距增加;复合抗菌剂中的锌以二价离子态形式存在,而铈以三价和四价两种离子态形式存在。对于锌和铈含量分别为3.77wt%和12.19wt%的Zn-CeX2样品,对E.coli和S.aureus的最低抑菌浓度(MIC)分别为2000mg·l1和2500mg·l1,表现出明显的协同抗菌作用。 A new type of zeolite composite antibacterial agents was prepared by introducing zinc and cerium into 13x zeolite through an ion-exchange method and characterized by energy dispersive X-ray analysis (EDX),X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS),and the antibacterial activity of the composite antibacterial agents was evaluated.The ion-exchange capability of Na+ in 13x zeolite with Ce3+ was clearly higher than that with Zn2+,and the crystalline structure of zeolite was not obviously affected by the exchange reaction except its crystal space distance with a small enhancement.The chemical valence of zinc in composite antibacterial agents was in a bivalent state,and that of cerium was in trivalent and tetravalent states.For Zn-CeX2 sample,which contained 3.77 wt% of zinc and 12.19 wt% of cerium,showing cooperative antibacterial effect obviously with the minimal inhibitory concentration (MIC) against E.coli and S.aureus of 2000 mg·l 1 and 2500 mg·l 1,respectively.
机构地区 暨南大学化学系
出处 《长春理工大学学报(自然科学版)》 2010年第2期86-89,共4页 Journal of Changchun University of Science and Technology(Natural Science Edition)
基金 国家自然科学基金项目(0676049 20871058 20971028) 省部产学研合作专项资金项目(2007B090400105 2008A010500005) 暨南大学本科生科技创新工程项目(cx08067cx09063 cx09064)
关键词 锌离子 铈离子 13X沸石 离子交换 抗菌活性论 zinc ion cerium ion 13x zeolite ion exchange antibacterial activity
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