Green synthesized metallic nanoparticles are continually receiving attention as antimicrobial agents and catalyst for degradation of a host of organic compounds. In this study, silver nanoparticles were synthesized using Aspilia pluriseta extracts and evaluated for their antimicrobial and photocatalytic activity. Using a UV–Vis spectrophotometer, the surface plasmon resonance observed at 427 nm indicated the materialization of silver nanoparticles. Probable vibrational stretches that are characteristic of silver nanoparticles such as –OH stretching vibrations and –CH₂ vibrational stretch, were identified using an FT-IR spectrophotometer. In order to understand the morphology and composition of the synthesized nanoparticles, they were studied further using scanning electron microscope (SEM), dynamic light scattering analyzer (DLS), transmission electron microscope (TEM) and X-ray diffractometer (XRD) hence revealing formation of crystalline, spherically shaped silver nanoparticles. The synthesized silver nanoparticles (AgNPs), exhibited broad-spectrum activity which was concentration dependent against; two-gram positive bacteria (Bacillus subtilis and Staphylococcus aureus), two-gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and the fungal (Candida albicans). Effectiveness of the nanomaterials in photocatalytic degradation was based on irradiation time. Decolorization and degradation of the dye took less than 30 min.

中文翻译：

---

通过Aspilia pluriseta提取物形成银纳米颗粒的抗菌和催化活性

绿色合成的金属纳米颗粒作为抗微生物剂和降解多种有机化合物的催化剂，一直受到关注。在这项研究中，使用银杏提取物合成了银纳米颗粒，并对其抗微生物和光催化活性进行了评估。使用紫外可见分光光度计，在427 nm处观察到的表面等离子体共振表明银纳米颗粒的物化。银纳米颗粒的特征可能的振动拉伸，例如–OH拉伸振动和–CH ₂使用FT-IR分光光度计确定振动拉伸。为了了解合成的纳米颗粒的形态和组成，使用扫描电子显微镜（SEM），动态光散射分析仪（DLS），透射电子显微镜（TEM）和X射线衍射仪（XRD）对其进行了进一步研究，从而揭示了形成的纳米颗粒。的球形球形银纳米颗粒。合成的银纳米颗粒（AgNPs）表现出广谱活性，其浓度依赖于此。两克阳性细菌（枯草芽孢杆菌和金黄色葡萄球菌），两克阴性细菌（大肠杆菌和铜绿假单胞菌）和真菌（白色念珠菌）。纳米材料在光催化降解中的有效性基于照射时间。染料的脱色和降解时间少于30分钟。