Abstract

Plant extract mediated nanoparticles have gained enormous attention for their green and rational approach and developed as an alternative to conventional chemical and physical methods. Here, the less exploited Jatropha integerrima flower extract is used in the synthesis of silver nanoparticles. The as-prepared nanoparticles exhibit a strong surface plasma resonance around 420 nm. Several spectroscopic techniques confirmed the formation of silver nanoparticles with an average size of 32.07 nm, stabilized by functional groups. The catalytic activity of synthesized nanoparticles for Rhodamine B dye degradation in the presence of sodium borohydride was investigated. The results showed that the 100 µL catalyst dose degraded the alkaline solution of dye up to 98%, with a high rate constant of 1.2110 min⁻¹. In addition, the nanoparticles were tested for antioxidant activity using the 2,2-dipehnyl-1-picrylhydrazyl free radical assay. The calculated IC₅₀ value for synthesized nanoparticles was 33.63 ± 0.53 µg/mL. Thus, the as-prepared nanoparticles are excellent candidates for catalytic and antioxidant activities compared to other materials used so far.

摘要

植物提取物介导的纳米粒子因其绿色和合理的方法而受到极大关注，并作为传统化学和物理方法的替代方法而发展起来。在这里，开发较少的麻疯树花提取物用于银纳米粒子的合成。所制备的纳米粒子在 420 nm 附近表现出强烈的表面等离子体共振。几种光谱技术证实了平均尺寸为 32.07 nm 的银纳米粒子的形成，并由官能团稳定。研究了合成纳米粒子在硼氢化钠存在下对罗丹明 B 染料降解的催化活性。结果表明，100 µL 催化剂剂量对染料碱性溶液的降解率高达 98%，速率常数高达 1.2110 min^-1。此外，使用 2,2-dipehnyl-1-picrylhydrazyl 自由基测定法测试了纳米颗粒的抗氧化活性。合成纳米粒子的计算 IC ₅₀值为 33.63 ± 0.53 µg/mL。因此，与迄今为止使用的其他材料相比，所制备的纳米粒子是催化和抗氧化活性的优秀候选者。