Department of Biological Sciences, International Islamic University, Islamabad 44000, Pakistan.
Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan.
Molecules. 2022 Aug 15;27(16):5184. doi: 10.3390/molecules27165184.
Microbial pathogens and bulk amounts of industrial toxic wastes in water are an alarming situation to humans and a continuous threat to aquatic life. In this study, multifunctional silver and graphene nanocomposites (Ag)(GNPs) [25% (x = 0.25), 50% (x = 0.50) and 75% (x = 0.75) of GNPs] were synthesized via ex situ approach. Further, the synthesized nanocomposites were explored for their physicochemical characteristics, such as vibrational modes (Raman spectroscopic analysis), optical properties (UV visible spectroscopic analysis), antibacterial and photocatalytic applications. We investigated the antimicrobial activity of silver and graphene nanocomposites (Ag-GNPs), and the results showed that Ag-GNPs nanocomposites exhibit remarkably improved antimicrobial activity (28.78% (), 31.34% () and 30.31% () growth inhibition, which might be due to increase in surface area of silver nanoparticles (AgNPs)). Furthermore, we investigated the photocatalytic activity of silver (AgNPs) and graphene (GNPs) nanocomposites in varying ratios. Interestingly, the Ag-GNPs nanocomposites show improved photocatalytic activity (78.55% degradation) as compared to AgNPs (54.35%), which can be an effective candidate for removing the toxicity of dyes. Hence, it is emphatically concluded that Ag-GNPs hold very active behavior towards the decolorization of dyes and could be a potential candidate for the treatment of wastewater and possible pathogenic control over microbes. In the future, we also recommend different other in vitro biological and environmental applications of silver and graphene nanocomposites.
微生物病原体和大量工业有毒废物在水中对人类来说是一个令人震惊的情况，也是水生生物的持续威胁。在这项研究中，通过原位方法合成了多功能银和石墨烯纳米复合材料（Ag）（GNPs）[25%（x = 0.25），50%（x = 0.50）和 75%（x = 0.75）的 GNPs]。此外，还研究了合成纳米复合材料的物理化学特性，如振动模式（拉曼光谱分析）、光学性质（紫外可见光谱分析）、抗菌和光催化应用。我们研究了银和石墨烯纳米复合材料（Ag-GNPs）的抗菌活性，结果表明 Ag-GNPs 纳米复合材料表现出显著提高的抗菌活性（28.78%（），31.34%（）和 30.31%（）的生长抑制，这可能是由于银纳米粒子（AgNPs）的表面积增加所致）。此外，我们还研究了不同比例的银（AgNPs）和石墨烯（GNPs）纳米复合材料的光催化活性。有趣的是，与 AgNPs（54.35%）相比，Ag-GNPs 纳米复合材料显示出提高的光催化活性（78.55%的降解），这可能是去除染料毒性的有效候选物。因此，可以强调的是，Ag-GNPs 对染料的脱色具有非常活跃的行为，并且可能是处理废水和可能控制微生物的潜在候选物。在未来，我们还建议对银和石墨烯纳米复合材料进行不同的其他体外生物学和环境应用。
