Dar Naseer Ahmad, Dar Parvaiz A, Qadir Mahpara, Shah Wajaht A
Department of Chemistry, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, 190006, India.
Sci Rep. 2025 Aug 13;15(1):29673. doi: 10.1038/s41598-025-92507-6.
Stachys tibetica, a significant medicinal plant was collected from Ladakh (India) and subjected to extraction. The extract was titrated with AgNO at 50ºC to obtain silver nanoparticles with plant extract acts as a reducing and capping agent. The eco-friendly synthetic procedure utilizes the phytochemicals in Stachys tibetica, ensuring a sustainable and non-toxic approach to nanoparticle production. The characterization of the silver nanoparticles was conducted using various techniques, including Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and dynamic light scattering (DLS). Field emission scanning electron microscopy (FE-SEM) was utilized to examine the surface morphology, revealing the irregular and rugged spherical shape of the synthesized nanoparticles. Stachys tibetica-derived silver nanoparticles (AgNPs) act as a versatile and robust multifunctional material with proficient bioactivity and catalytic properties. The synthesized silver nanoparticles displayed effective antioxidant and antimicrobial properties against Bacillus Cereus, Pseudomonas, Escherichia coli, and S.Aureus. Additionally, the green nanoparticles degraded Rhodamine-B under sunlight irradiation within 1 h at a rate constant of 0.066 min.
西藏水苏是一种重要的药用植物，从印度拉达克采集后进行提取。提取物在50℃下用硝酸银滴定，以获得银纳米颗粒，植物提取物作为还原剂和封端剂。这种环保的合成方法利用了西藏水苏中的植物化学物质，确保了纳米颗粒生产的可持续性和无毒方法。使用各种技术对银纳米颗粒进行表征，包括傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）和动态光散射（DLS）。利用场发射扫描电子显微镜（FE-SEM）检查表面形态，揭示合成纳米颗粒不规则且粗糙的球形形状。源自西藏水苏的银纳米颗粒（AgNPs）是一种具有多种功能且强大的多功能材料，具有出色的生物活性和催化性能。合成的银纳米颗粒对蜡样芽孢杆菌、假单胞菌、大肠杆菌和金黄色葡萄球菌表现出有效的抗氧化和抗菌性能。此外，绿色纳米颗粒在阳光照射下1小时内以0.066分钟的速率常数降解罗丹明-B。
