In this research, “Tragopogon collinus” extract was used for synthesis of silver nanoparticles and their biological properties were studied. Based on this, the extract of the plant was prepared and the synthesis of silver nanoparticles under different conditions were investigated. The best conditions for the synthesis of nanoparticles were 0.0025 M of silver nitrate, temperature of 40 °C, pH 10 and 20 cc of the extract, which the formation of the nano particles were confirmed by UV–Vis, TEM, XRD, FT-IR analysis. Average size of the particles were obtained 7 nm and the formation of the nano silver crystals was proved. The synthesized silver nanoparticles showed inhibition zone for both Gram-positive and -negative bacteria and Staphylococcus aureus has better result compared to Escherichia coli.

Graphic Abstract

中文翻译：

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菱角叶提取物绿色合成银纳米颗粒及其抑菌作用的研究

在这项研究中，使用“ tragopogon collinus ”提取物合成了银纳米颗粒，并对其生物学特性进行了研究。在此基础上，制备了植物提取物，并研究了不同条件下银纳米颗粒的合成。合成纳米颗粒的最佳条件是0.0025 M的硝酸银，温度40°C，pH 10和20 cc的提取物，通过UV-Vis，TEM，XRD，FT-红外分析。获得了7nm的平均粒径，并证明了纳米银晶体的形成。合成的银纳米粒子对革兰氏阳性菌和阴性菌均显示出抑制区，与金黄色葡萄球菌相比，金黄色葡萄球菌具有更好的抑制效果。大肠杆菌。

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