Abstract

Green synthesis nanoparticles are considered as an alternative effective resource instead of chemical engineered nanoparticles. Using seed extract for green synthesis, essential for the reduction and oxidation process of the metals. Rauvolfia tetraphylla (L.) seed extract was used to synthesize dark brown colored silver (Ag) and white colored zinc oxide (ZnO) nanoparticles. Synthesized nanoparticles were characterized by different spectroscopic analysis (XRD, XPS, and SEM with EDAX). Characterization results confirmed the particle morphology, and structure. The synthesized Ag and ZnO NPs were analyzed against two gram positive and three gram negative bacteria. Increased levels of green synthesized Ag and ZnO NPs showed increased zone of inhibition than compared with ciprofloxacin (positive control). Our study proved that the green synthesized Ag and ZnO NPs showed similar unique physical and chemical properties with composite/doped metal oxide nanoparticles but less toxic while their discharge into the ecosystem.

Graphic Abstract

中文翻译：

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绿色合成的银和氧化锌纳米粒子的结构和生物学研究。

摘要

绿色合成纳米颗粒被认为是替代化学工程纳米颗粒的替代有效资源。使用种子提取物进行绿色合成，这对于金属的还原和氧化过程至关重要。四叶红景天（L.）种子提取物用于合成深褐色的银（Ag）和白色的氧化锌（ZnO）纳米颗粒。通过不同的光谱分析（XRD，XPS和EDAX SEM）对合成的纳米颗粒进行了表征。表征结果证实了颗粒的形态和结构。分析了合成的Ag和ZnO NP对2克阳性和3克阴性细菌的影响。与环丙沙星相比（阳性对照），绿色合成的Ag和ZnO NPs的绿色水平升高显示出抑制区域的增加。我们的研究证明，绿色合成的Ag和ZnO NPs具有与复合/掺杂的金属氧化物纳米颗粒相似的独特物理和化学性质，但在排放到生态系统中时毒性较小。

图形摘要