Center of Excellence for Energy and Environmental Studies, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, 131039, India.
Department of Botany, University of Rajasthan, Jaipur, 302004, India.
Environ Sci Pollut Res Int. 2021 Jan;28(4):3972-3982. doi: 10.1007/s11356-020-11834-5. Epub 2021 Jan 4.
The present study focuses on extract-mediated Ag nanoparticles (NPs), AgCl-NPs, and Ag/AgCl nanocomposites (NCs) as photocatalysts along with its antimicrobial and dye degradation activities. The synthesis of these NPs and NCs was performed by using Azadirachta indica plant fruit extract and analyzed using UV-Vis spectroscopy to confirm the synthesis and band gap of these NPs and NCs, X-ray diffraction (XRD) to determine its size and crystalline nature. Fourier transform infrared spectroscopy (FTIR) to discern phytochemicals, responsible for the reduction and capping of the synthesized NCs. Scanning electron microscopy analysis (SEM), transmission electron microscopy analysis (TEM), and energy dispersive X-ray (EDX) spectroscopy analysis were performed to validate the morphology and presence of silver and chloride percentage in the composites. Later, these NPs and NCs were used for their potential role in photocatalytic degradation of methylene blue dye and antibacterial activity against Escherichia coli and Staphylococcus aureus of human pathogen. The prepared Ag/AgCl-NCs exhibited an enhanced photocatalytic and antibacterial activities in comparison with pure Ag and AgCl nanomaterials. However, green-synthesized NPs and NCs played dual roles as a photocatalyst and antibacterial agent in various biomedical and industrial sectors. Moreover, we found that it might be a hot research in many other environmental applications in upcoming days.
本研究重点关注了提取介导的银纳米粒子（NPs）、AgCl-NPs 和 Ag/AgCl 纳米复合材料（NCs）作为光催化剂，以及它们的抗菌和染料降解活性。这些 NPs 和 NCs 的合成是使用印楝植物果实提取物进行的，并通过紫外-可见光谱分析来确认这些 NPs 和 NCs 的合成和带隙，通过 X 射线衍射（XRD）来确定它们的大小和晶体性质。傅里叶变换红外光谱（FTIR）用于辨别负责合成 NCs 的还原和封端的植物化学物质。进行了扫描电子显微镜分析（SEM）、透射电子显微镜分析（TEM）和能量色散 X 射线（EDX）光谱分析，以验证复合材料的形态和银及氯的存在百分比。随后，这些 NPs 和 NCs 被用于研究它们在光催化降解亚甲基蓝染料和对人类病原体大肠杆菌和金黄色葡萄球菌的抗菌活性方面的潜在作用。与纯银和 AgCl 纳米材料相比，制备的 Ag/AgCl-NCs 表现出增强的光催化和抗菌活性。然而，绿色合成的 NPs 和 NCs 在各种生物医学和工业领域中发挥着光催化剂和抗菌剂的双重作用。此外，我们发现，在未来的日子里，它可能会成为许多其他环境应用中的热门研究课题。
