Abstract

We have developed a green and environmentally friendly approach for the synthesis of silver nanoparticles (Ag NPs) using Pithecellobium dulce seeds (PDS) extract via a simple route and characterized by several techniques. Ag NPs have an average particle size is 8 nm and used as a catalyst for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) within 3 min of reaction. Ag NPs could be easily recovered and reused five times without significant loss in its catalytic activity. The synthesized Ag NPs were investigated for optical sensing of various metal ions in aqueous solutions by monitoring their surface plasmon resonance (SPR), results showed that the selective response to mercury (Hg²⁺) ions. Ag NPs exhibited significant antibacterial activity against several microorganisms including Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus subtilis by a paper-disk method. The synthesized Ag NPs also exhibited virtuous antioxidant activity.

摘要

我们已经开发了一种绿色环保的方法，可以通过简单的路线并使用多种技术来表征使用皮氏梭菌种子（PDS）提取物合成银纳米颗粒（Ag NPs）的方法。Ag NP的平均粒径为8 nm，并用作在3分钟内将4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP）的催化剂。Ag NPs可以轻松回收并重复使用五次，而不会显着降低其催化活性。通过监测其表面等离子共振（SPR），研究了合成的Ag NPs对水溶液中各种金属离子的光学传感，结果表明对汞（Hg ²⁺）离子。通过纸盘法，Ag NPs对包括大肠杆菌，金黄色葡萄球菌，铜绿假单胞菌和枯草芽孢杆菌在内的几种微生物表现出显着的抗菌活性。合成的Ag NP还显示出良好的抗氧化活性。