Abstract

In the present study, green synthesis of silver nanoparticles (Ag NPs) was synthesized from silver ions using the reducing agents of Catharanthus roseus flowers extract. This flower was extract and fractionated by non-polar to polar solvent using separating funnel. The distilled water fraction was analyses the primary phytochemical test and used the synthesis of NPs. The UV-vis spectra wavelength value at 447 nm was confirmed the product of Ag NPs. FTIR spectrum wavenumbers at 3401 and 1625 cm⁻¹ has indicates the hydroxyl and carbonyl groups, respectively, capping the Ag NPs. HRTEM images of Ag NPs shows the spherical shape with sizes 5–20 nm. This NPs has excellent photocatalyst in the reduction of methyl orange and 4-nitrophenol (4-NP) in the presence of NaBH₄. These NPs has potential antioxidant activity of DPPH, and H₂O₂ assays against the standard ascorbic acid contain the 100 µg/ml of NPs shows 65% and 77% of inhibition activity.

抽象的

在本研究中，使用长春花提取物的还原剂从银离子合成了绿色合成的银纳米颗粒（Ag NPs）。提取该花，并使用分液漏斗通过非极性至极性溶剂进行分级分离。蒸馏水馏分经过初步植物化学分析，并用于NP的合成。确认在447 nm处的UV-vis光谱波长值是Ag NPs的产物。在3401和1625 cm ^-1处的FTIR光谱波数分别表明羟基和羰基，封端了Ag NP。Ag NPs的HRTEM图像显示球形，尺寸为5–20 nm。在NaBH ₄存在下，该NP在还原甲基橙和4-硝基苯酚（4-NP）方面具有出色的光催化剂。。这些NP具有潜在的DPPH抗氧化活性，针对标准抗坏血酸的H ₂ O ₂分析含有100μg/ ml NP，显示出65％和77％的抑制活性。