Extracellular green synthesis of silver nanoparticles using Amazonian fruit Araza(Eugenia stipitata McVaugh)

用亚马逊地区水果提取物(Eugenia stipitata McVaugh)细胞体外绿色合成银纳米颗粒（英文）

An eco-friendly method for the extracellular synthesis of silver nanoparticles（AgNPs） using aqueous Araza fruit extract and their antioxidant activity was investigated. It was observed that UV–Vis absorption peak is dependent on various parameters such as pH, temperature, and change of time. The initial appearance of the yellow color with intense surface plasmon bands at 430-450 nm, then transmission electron microscopy, scanning electron microscopy and X-ray diffraction analysis revealed the formation of 15-45 nm sized, spherical and crystalline Ag NPs. Fourier transform infrared spectroscopy depicted that malic acid, citric acid, and carotenoids of Araza fruit involved in the synthesis of Ag NPs. In addition, the surface modified AgNPs（77.42%, 1mL） showed nearly double antioxidant efficiency than Araza fruit extract（35.30%, 1 mL） against 1, 1-diphenyl-2-picrylhydrazyl. The present study highlights the possibility of using the Araza fruit to synthesize AgNPs, which could be used effectively in the present and future antioxidant agent.

提出一种用亚马逊地区水果提取物（液态）细胞体外合成银纳米颗粒（AgNPs）的生态友好方法,并研究其抗氧化活性。结果表明：AgNPs的紫外-可见光吸收峰与各参数如pH值、温度和时间相关。初始黄色样品在波长为430～450nm范围的强吸收峰、透射电镜、扫描电镜及X射线衍射分析结果表明,形成了尺寸为15～45nm、球状AgNPs晶体。傅里叶变换红外光谱表明AgNPs的合成与苹果酸、柠檬酸和类胡萝卜素有关。此外,经表面改性的AgNPs（77.42%,1mL）对2,2-二苯基-1-苦肼基的抗氧化效率是Araza果实提取物的（35.30%,1mL）的2倍。此研究为采用Araza果实提取物合成AgNPs提供了可行性,所合成的AgNPs可用作有效的抗氧化剂。