Abstract

In the present study, we report a simple and ecofriendly phytosynthesis of silver nanoparticles (AgNPs) using fruits of Capsicum baccatum L. (Andean chili). During the reaction, the phytoconstituents of C. baccatum act as a reducing and stabilizing agent. Phyotsynthesized AgNPs were characterized through various spectroscopy and microscopic techniques. The produced AgNPs showed a plasmon band at λ_max = 458 nm and stable for 10 days, confirmed by UV-vis spectroscopy. Transmission electron microscopy (TEM) explained that the produced AgNPs were quasi-spherical in shape with an average size of 10–30 nm and small aggregation. The X-ray diffraction analysis confirmed the crystalline nature of the AgNPs. Aggregation of AgNPs was indicated in the dynamic light scattering (DLS) and TEM analysis. AgNPs also exhibited quenching/sensing activity of H₂O₂ (>50%) at room temperature. The results demonstrate that as-synthesized AgNPs are inexpensive, sustainable and could be an alternative as optical chemical sensors.

摘要

在本研究中，我们报告了一种使用Capsicum baccatum L.（安第斯辣椒）果实的简单且环保的植物合成银纳米粒子 (AgNPs )。在反应过程中，仙人掌的植物成分充当还原剂和稳定剂。Phyotsynthesized AgNPs 通过各种光谱学和显微技术进行了表征。产生的 AgNPs 在λ _{max处显示等离子带}= 458 nm，稳定 10 天，经紫外-可见光谱证实。透射电子显微镜（TEM）解释说，产生的 AgNPs 呈准球形，平均尺寸为 10-30 nm，聚集小。X 射线衍射分析证实了 AgNPs 的结晶性质。在动态光散射 (DLS) 和 TEM 分析中表明 AgNPs 的聚集。AgNPs在室温下还表现出 H ₂ O _{2 (>50%) 的猝灭/传感活性。}结果表明，合成的 AgNP 价格低廉、可持续，可以作为光学化学传感器的替代品。