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首页> 外文期刊>Digest Journal of Nanomaterials and Biostructures >GREEN SYNTHESIS OF Ag2S NANOPARTICLES: EFFECT OF pH AND CAPPING AGENT ON SIZE AND SHAPE OF NPs AND THEIR ANTIBACTERIAL ACTIVITY
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GREEN SYNTHESIS OF Ag2S NANOPARTICLES: EFFECT OF pH AND CAPPING AGENT ON SIZE AND SHAPE OF NPs AND THEIR ANTIBACTERIAL ACTIVITY

机译：绿色合成Ag2S纳米粒子：pH和封端剂对NPs尺寸和形状及其抗菌活性的影响

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This work reports on the synthesis of silver sulfide nanoparticles capped with either chitosan, green tea, Combtretum molle or black wattle extracts. The nanoparticles were synthesized in an aqueous solution in the presence of capping agent as stabilizer and reducing agents. Silver nitrate and thiourea were used as silver and sulfur precursor respectively. The formation of nanoparticles was confirmed using ultraviolet-visible spectroscopy, which showed silver sulfide peaks between 343-402 nm. The Transmission Electron Microscope images also confirmed the formation of silver sulfide nanoparticles with a spherical shape depending on the capping agent used. X-ray diffraction analysis revealed that the nanoparticles have the acanthite phase. Fourier transform infrared spectroscopy confirmed that the nanoparticles successfully capped. The nanoparticles were also tested for their antibacterial activity and they were found to be active against Staphylococcus aureus and Escherichia coli. The minimum inhibitory concentrations for the synthesized nanoparticles were between 0.15 and 0.31 mg/mL.
机译：这项工作报道了用壳聚糖，绿茶，Combtretum molle或黑荆芥提取物封端​​的硫化银纳米颗粒的合成。在封端剂作为稳定剂和还原剂的存在下，在水溶液中合成纳米颗粒。硝酸银和硫脲分别用作银和硫的前体。使用紫外-可见光谱法确认了纳米颗粒的形成，其显示了在343-402 nm之间的硫化银峰。透射电子显微镜图像还证实了取决于所使用的封端剂，球形的硫化银纳米颗粒的形成。 X射线衍射分析表明该纳米颗粒具有have石相。傅里叶变换红外光谱证实纳米颗粒成功封端。还测试了纳米颗粒的抗菌活性，发现它们对金黄色葡萄球菌和大肠杆菌具有活性。合成的纳米粒子的最小抑制浓度在0.15和0.31 mg / mL之间。

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