ABSTRACT

Green synthesis of silver nanoparticles (AgNPs) was carried out using the aqueous leaf extract of rare medicinal plant Decaschistia crotonifolia (Dc). The spectral characterization of the biosynthesized Dc-AgNPs was carried out by using different spectral methods viz., ultraviolet visible spectroscopy (UV-Vis) showed that Dc-AgNPs have surface plasmon resonance (SPR) peak at 437 nm. Fourier transform infrared spectroscopy (FTIR) analysis revealed the role of various functional groups responsible for the synthesis and the stabilization of Dc-AgNPs. In Transmission electron microscopy (TEM) studies, the Dc-AgNP average size is detected as 13.6 nm and all the nanoparticles are in the range of 12–18 nm with spherical shape and poly-dispersed nature. The stability of Dc-AgNPs was due to its high negative zeta potential value −26.0 mV. The X-ray diffraction (XRD) studies confirmed the crystalline nature of Dc-AgNPs. The Dc-AgNPs proved to have effective antimicrobial activity against Gram-positive and Gram-negative bacterial stains, also revealed excellent antioxidant and catalytic activity.

摘要

使用稀有药用植物巴氏Decaschistia crotonifolia（Dc）的水叶提取物进行了银纳米颗粒（AgNPs）的绿色合成。通过使用不同的光谱方法对生物合成的Dc-AgNPs进行光谱表征，即紫外可见光谱（UV-Vis）显示Dc-AgNPs在437 nm处具有表面等离振子共振（SPR）峰。傅立叶变换红外光谱（FTIR）分析揭示了负责Dc-AgNPs合成和稳定的各种官能团的作用。在透射电子显微镜（TEM）研究中，Dc-AgNP的平均粒径为13.6 nm，所有纳米颗粒均在12–18 nm范围内，具有球形和多分散性。Dc-AgNPs的稳定性归因于其高的负zeta电位值-26.0 mV。X射线衍射（XRD）研究证实了Dc-AgNPs的晶体性质。