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Green synthesis of silver nanoparticles and their application for catalytic degradation of hazardous reactive dye in aqueous solution

机译：银纳米粒子的绿色合成及其在水溶液中危险活性染料催化降解的应用

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Silver nanoparticles (AgNPs) have been recognized in recent years because of their unique properties. In this paper, plant-mediated biosynthesis of silver nanoparticles (AgNPs) was investigated. Aloe extract acted as both reducing and stabilizing agent in the synthesis of silver nanoparticles. The synthesis of nanoparticles by various physical and chemical methods, such as ultrasonic irradiation, laser ablation and evaporative cooling (to name a few) has been studied extensively. However, these methods pose environmental threat. AgNPs will be photosynthesized by aloe extract, and the catalytic activity of green synthesized AgNPs will be discussed by catalytic degradation of reactive orange dye in the presence of NaBH4 in the aqueous solution. The synthesized AgNPs were characterized with UV-visible absorption spectrum, Transmission Electron Microscopy (TEM), and particles size distribution analysis. UV-visible absorption spectrum indicated a significant absorption peak at 463 nm related to the great synthesis of AgNPs in the aqueous solution. TEM images showed the well dispersed AgNPs, and that the average diameter of AgNPs was around 38nm. Furthermore, the AgNPs were utilized for the removal of hazardous reactive dye in the aqueous solution. From the experimental results, the AgNPs showed excellent catalytic activity in the degradation of reactive orange dye in the presence of NaBH4.
机译：近年来，银纳米颗粒（AGNPS）已被确认，因为它们的独特性质。本文研究了植物介导的银纳米颗粒（AGNP）的生物合成。芦荟提取物在银纳米粒子的合成中作用为还原和稳定剂。通过各种物理和化学方法合成纳米颗粒，例如超声辐射，激光烧蚀和蒸发冷却（仅对几个）进行了研究。然而，这些方法构成了环境威胁。 AgNP将通过芦荟提取物光合作用，并且将通过在水溶液中NaBH 4存在下反应性橙色染料的催化降解来讨论绿色合成AgNP的催化活性。合成的AgNP具有UV可见吸收光谱，透射电子显微镜（TEM）和颗粒尺寸分布分析。 UV可见吸收光谱表明，463nm的显着吸收峰与水溶液中的agnps的大量合成有关。 TEM图像显示出良好分散的AgNP，AgNP的平均直径约为38nm。此外，用于去除水溶液中的危险反应性染料的AgNP。从实验结果中，AgNP在NaBH 4存在下，在反应性橙色染料的降解中显示出优异的催化活性。

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