ABSTRACT

Silver nanoparticles (AgNPs) has the potential for membrane development with antibacterial properties. However, the synthesis method and parameter are crucial factors in determining nanoparticles formation and nucleation process. This study presents the effects of precursor concentration and synthesis temperature towards AgNPs formation in two distinctive methods. The results have shown a significant variation of AgNPs-1 and AgNPs-2 synthesised with different synthesis parameters. With respect to particles size determined using particle size analyser, the best synthesis condition for AgNPs-1 was at 25°C using 0.255 g AgNO³ while for AgNPs-2 was at 75°C using 0.03 mol/L AgNO³. The characteristics of selected AgNPs-1 and AgNPs-2 were analysed via Uv-Vis, FTIR, FESEM, EDX and HR-TEM. The efficiency of AgNPs-1 and AgNPs-2 were compared with commercial AgNPs based on its antibacterial performances towards E. coli and S. aureus using bacteria plate count method. Remarkably, both synthesised AgNPs possessed improved bactericidal effect compared to commercial AgNPs.

摘要

银纳米粒子 (AgNPs) 具有抗菌性能的膜开发潜力。然而，合成方法和参数是决定纳米粒子形成和成核过程的关键因素。本研究以两种不同的方法介绍了前体浓度和合成温度对 AgNPs 形成的影响。结果表明，不同合成参数合成的 AgNPs-1 和 AgNPs-2 存在显着变化。对于使用粒度分析仪测定的粒度，AgNPs-1 的最佳合成条件是在 25°C 下使用 0.255 g AgNO ³ 而对于 AgNPs-2 是在 75°C 下使用 0.03 mol/L AgNO ³. 通过 Uv-Vis、FTIR、FESEM、EDX 和 HR-TEM 分析了选定的 AgNPs-1 和 AgNPs-2 的特性。 使用细菌平板计数法，基于其对大肠杆菌 和 金黄色葡萄球菌的抗菌性能，比较了 AgNPs-1 和 AgNPs-2 与商业 AgNPs 的效率 。值得注意的是，与商业 AgNPs 相比，两种合成的 AgNPs 都具有更好的杀菌效果。