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首页> 外文期刊>Journal of Polymers and the Environment >Arabic Gum as Bio-Synthesizer for Ag-Au Bimetallic Nanocomposite Using Seed-Mediated Growth Technique and Its Biological Efficacy
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Arabic Gum as Bio-Synthesizer for Ag-Au Bimetallic Nanocomposite Using Seed-Mediated Growth Technique and Its Biological Efficacy

机译：种子介导生长技术制备阿拉伯胶作为Ag-Au双金属纳米复合材料的生物合成剂

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摘要

Bio-synthesis of nanostructures is an ever green approach; therefore, the current work attempts to use Arabic gum as bio-synthesizer for manufacturing Ag-Au bimetallic nanocomposite, using seed-mediated growth technique. The relevance of the as-used natural gums for manufacturing of Ag-Au nanocomposite in quite simple, energy saving and cost effective methodology, has been successfully approved. Arabic gum acted concurrently as a reducer for metal ions to nano-sized structures and crystal growth modifier of the so-generated nanocomposite. Monitoring of interchanging in size distribution of the as-produced bimetallic nanocomposite by the effect of the gum concentration, concentration of nanometals precursors, their addition sequencing in reaction liquor, and reaction temperature, was illustrated and well characterized. UV-Visible spectra showed that the characteristic surface plasmon resonance peak for Ag-Au bimetallic nanocomposite was observed at 480-495 nm and XRD patterns confirmed the preparation of bimetallic nanostructures. According to zetasizer analyses and TEM micrographs, small sized (3.1 nm) Ag-Au bimetallic nanocomposite with narrow size distribution (1-7 nm) were obtained. The all prepared bimetallic nanocomposite showed good stability with polydispersity index ranged in 0.203-0.530. The mechanism of nanostructures' generation was suggested and approved using FT-IR, 1HNMR and 13CNMR spectra. The prepared Ag-Au bimetallic nanocomposites showed excellent antibacterial activity against both of gram + ve and gram - ve strains.
机译：纳米结构的生物合成是一种绿色的方法。因此，目前的工作试图通过种子介导的生长技术将阿拉伯树胶用作生物合成剂来制造Ag-Au双金属纳米复合材料。已成功批准了使用天然胶以非常简单，节能且具有成本效益的方法制造Ag-Au纳米复合材料的相关性。阿拉伯树胶同时充当金属离子到纳米级结构的还原剂以及如此生成的纳米复合材料的晶体生长调节剂。通过树胶浓度，纳米金属前体的浓度，它们在反应液中的添加顺序和反应温度的影响，监测了所生产的双金属纳米复合材料的尺寸分布的互换。紫外可见光谱表明，在480-495 nm处观察到了Ag-Au双金属纳米复合材料的特征表面等离子体共振峰，X射线衍射图证实了双金属纳米结构的制备。根据zetasizer分析和TEM显微照片，获得具有窄尺寸分布（1-7nm）的小尺寸（3.1nm）的Ag-Au双金属纳米复合材料。全部制备的双金属纳米复合材料显示出良好的稳定性，多分散指数在0.203-0.530范围内。使用FT-IR，1HNMR和13CNMR光谱提出并批准了纳米结构的生成机理。制备的Ag-Au双金属纳米复合材料对革兰氏阳性和革兰氏阴性菌株均显示出优异的抗菌活性。

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