• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Facile synthesis of S-Ag nanocomposites and Ag2S short nanorods by the interaction of sulfur with AgNO3 in PEG400
【24h】

Facile synthesis of S-Ag nanocomposites and Ag2S short nanorods by the interaction of sulfur with AgNO3 in PEG400

机译：通过PEG400中硫与AgNO3的相互作用轻松合成S-Ag纳米复合材料和Ag2S短纳米棒

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A facile, eco-friendly and inexpensive method to prepare Ag2S short nanorods and S-Ag nanocomposites using sublimed sulfur, AgNO3, PVP and PEG400 was studied. According to x-ray diffraction and scanning electron microscopy of the Ag2S, the products are highly crystalline and pure Ag2S nanorods with diameters of 70-160 nm and lengths of 200-360 nm. X-ray diffraction of the S-Ag nanocomposites shows that we obtained cubic Ag and S nanoparticles. Transmission electron microscopy shows that the molar ratio of PVP to Ag+ plays an important role in controlling the size and morphology of the S-Ag nanocomposites. When the molar ratio of PVP to Ag+ was 10:1, smaller sizes, better dispersibility and narrower distribution of S-Ag nanocomposites with diameters of 10-40 nm were obtained. The formation mechanism of the S-Ag nanocomposites was studied by designing a series of experiments using ultravioletvisible measurement, and it was found that S nanoparticles are produced first and act as seed crystals; then Ag+ becomes Ag nanocrystals on the surfaces of the S nanoparticles by the reduction of PVP. PEG400 acts as a catalyzer, accelerating the reaction rate, and protects the S-Ag nanocomposites from reacting to produce Ag2S. The antimicrobial experiments show that the S-Ag nanocomposites have greater antimicrobial activity on Staphylococcus aureus, Aspergillus niger and blue mold than Ag nanoparticles.
机译：研究了一种用升华硫，AgNO3，PVP和PEG400制备Ag2S短纳米棒和S-Ag纳米复合材料的简便，环保，廉价的方法。根据Ag2S的X射线衍射和扫描电镜观察，产品为高度结晶且纯净的Ag2S纳米棒，直径为70-160 nm，长度为200-360 nm。 S-Ag纳米复合材料的X射线衍射表明，我们获得了立方Ag和S纳米颗粒。透射电子显微镜显示，PVP与Ag +的摩尔比在控制S-Ag纳米复合材料的尺寸和形态方面起着重要作用。当PVP与Ag +的摩尔比为10：1时，获得了较小的尺寸，更好的分散性和较窄的直径为10-40nm的S-Ag纳米复合材料。通过紫外可见测量设计了一系列实验，研究了S-Ag纳米复合材料的形成机理，发现S纳米颗粒首先产生并充当晶种。然后Ag +通过还原PVP在S纳米颗粒的表面变成Ag纳米晶体。 PEG400充当催化剂，加快反应速率，并保护S-Ag纳米复合材料免于反应生成Ag2S。抗菌实验表明，S-Ag纳米复合材料对金黄色葡萄球菌，黑曲霉和蓝霉菌的抗菌活性均高于Ag纳米颗粒。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号