含银掺氮碳材料在饮用水体系的抑菌作用

发布时间：2018-06-04 01:19

  本文选题：碳材料 + 银　； 参考：《环境化学》2015年07期

【摘要】：以对苯二胺和乙二醛反应生成的一种希夫碱碳氮聚合物为基材,添加Ag NO3,使Ag+与该聚合物中N原子配位形成一种复合材料,此材料高温碳化形成了一种新的含银掺氮碳材料.X射线衍射(XRD)结果显示了该复合材料中单质纳米银的存在;透射电子显微镜(TEM)显示有纳米银线的存在;傅立叶红外波谱(FTIR)证实此碳材料中—NH2、C—C、C迨C及C迨N随着温度升高而降低,银在800℃以上时被原位还原为银单质;X射线光电子能谱(XPS)表明材料中存在氮和银,银和氮有一定相互作用.该碳材料应用于饮用水,研究其对大肠杆菌(E.coil)的抑菌性能.发现希夫碱与Ag的物质的量之比为1∶0.8,材料的炭化温度为800℃时,此材料可具有1.54-log以上的对数去除率.实际水样的应用抑菌测试也显示出令人满意的抑菌效果,而且抗银流失性能满足国家饮用水标准GB5749-2006.
[Abstract]:A kind of Schiff base carbonitrogen polymer, which was formed by the reaction of p-phenylenediamine with Glyoxal, was used as the base material and Ag no _ 3 was added to make Ag coordinate with N atom in the polymer to form a composite material. The results of X-ray diffraction (XRD) show the existence of nanocrystalline silver in the composites, and the existence of nanocrystalline silver wires by transmission electron microscopy (TEM). Fourier transform Infrared Spectroscopy (FTIR) confirmed that the contents of -NH _ 2N _ C _ (C) C _ (C) and C _ (C) / N decreased with the increase of temperature, and that silver was reduced to silver in situ at 800 鈩，

本文编号：1975164