This study concentrates on biosynthesis of Silver Nanoparticles (AgNPs) from stem extract of Acacia nilotica (A. nilotica). The reaction was completed at a temperature ~40–45 °C and time duration of 5 h. AgNPs were thoroughly investigated via advanced characterization techniques such as UV–Vis spectrophotometry (UV–Vis), Fourier Transform Infrared spectroscopy (FTIR), X-ray Diffractometry (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), X-ray Photoelectron Spectroscopy (XPS), Thermo Gravimetric Analysis (TGA), Diffuse Reflectance Spectroscopy (DRS), Brunner-Emmett-Teller (BET), Dynamic Light Scattering (DLS), and Zeta potential analysis. AgNPs with average size below 50 nm were revealed by all the measuring techniques. Maximum surface area ~5.69 m²/g was reported for the as synthesized NPs with total pore volume ~0.0191 mL/g and average pore size ~1.13 nm. Physical properties such as size and shape have changed the surface plasmon resonance peak in UV–visible spectrum. Antimicrobial activity was reported due to denaturation of microbial ribosome's sulphur and phosphorus bond by silver ions against bacterium Methicillin Resistant Staphylococcus aureus (MRSA) and fungus Candida Albican (CA). Furthermore, AgNPs degraded toxic pollutants such as 4-nitrophenol (4-NP), 2-nitrophenol (2-NP) and various hazardous dyes such as Congo Red (CR), Methylene Blue (MB) and Methyl Orange (MO) up to 95%. The present work provided low cost, green and an effective way for synthesis of AgNPs which were utilized as potential antimicrobial agents as well as effective catalyst for detoxification of various pollutants and dyes.

这项研究的重点是从相思树（A. nilotica）的茎提取物中生物合成银纳米颗粒（AgNPs）。）。反应在约40–45°C的温度下进行，持续时间为5 h。通过先进的表征技术，例如紫外可见分光光度法（UV-Vis），傅立叶变换红外光谱（FTIR），X射线衍射法（XRD），场发射扫描电子显微镜（FESEM），高分辨率透射电子显微镜，对AgNP进行了彻底的研究。 （HRTEM），X射线光电子能谱（XPS），热重分析（TGA），漫反射光谱（DRS），Brunner-Emmett-Teller（BET），动态光散射（DLS）和Zeta电位分析。所有测量技术均揭示出平均大小低于50 nm的AgNP。最大表面积〜5.69 m ²对于合成的NP，报道了/ g，总孔体积为〜0.0191 mL / g，平均孔径为〜1.13 nm。物理性质（例如大小和形状）已经改变了UV可见光谱中的表面等离子体共振峰。据报道，抗菌活性是由于银离子使微生物核糖体的硫和磷键变性，从而抵抗了耐甲氧西林的金黄色葡萄球菌（MRSA）和白色念珠菌（CA）。）。此外，AgNPs降解的有毒污染物，例如4-硝基苯酚（4-NP），2-硝基苯酚（2-NP）和各种有害染料，例如刚果红（CR），亚甲基蓝（MB）和甲基橙（MO），最高可达95％。目前的工作提供了低成本，绿色和有效的方法合成AgNPs，这些AgNPs被用作潜在的抗菌剂以及各种污染物和染料的脱毒有效催化剂。