Green synthesis of silver nanoparticles using Eupatorium adenophorum leaf extract: characterizations, antioxidant, antibacterial and photocatalytic activities.
Tarun Kumar DuaSimran GiriGouranga NandiRanabir SahuTapan Kumar ShawParamita PaulPublished in: Chemicke zvesti (2023)
The green synthesis of metallic nanoparticles has tremendous impacts in various fields as found in recent years due to their low cost, easy and environmentally friendly synthesis. In this article, we report a simple and eco-friendly method for the synthesis of silver nanoparticles (AgNPs) using an aqueous Eupatorium adenophorum ( E. adenophorum ) leaf extract as a bioreductant. Interestingly, Fourier transform infrared (FTIR) spectroscopy analysis established that the E. adenophorum extract not only served as a bioreductant but also acted as a capping agent to stabilize the nanoparticles by functionalizing the surfaces. Various characterization techniques were adopted, such as X-ray powder diffraction (XRD), FTIR, ultraviolet-visible absorption (UV-Vis) spectroscopy, dynamic light scattering, scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDX) to analyze the biosynthesized AgNPs. Biosynthesized nanoparticles were also explored for antioxidant, antibacterial and photocatalytic activities. The AgNPs showed improved free radical scavenging activity (IC 50 48.96 ± 0.84 µg/mL) and bacterial inhibitory effects against both gram-positive ( Staphylococcus aureus ; 64.5 µg/mL) and gram-negative ( Escherichia coli ; 82.5 µg/mL) bacteria. Photocatalytic investigation showed AgNPs were effective at degrading rhodamine dye (78.69% in 90 min) when exposed to sunlight. These findings collectively suggest that E. adenophorum AgNPs were successfully prepared without the involvement of any hazardous chemical and it may be an effective antibacterial, antioxidant and promising agent for the removal of hazardous dye from waste water produced by industrial dyeing processes.
Keyphrases
- silver nanoparticles
- electron microscopy
- gram negative
- high resolution
- low cost
- oxidative stress
- highly efficient
- visible light
- escherichia coli
- staphylococcus aureus
- multidrug resistant
- anti inflammatory
- single molecule
- biofilm formation
- reduced graphene oxide
- heavy metals
- ionic liquid
- magnetic resonance imaging
- pseudomonas aeruginosa
- wastewater treatment
- mass spectrometry
- risk assessment
- cystic fibrosis
- gold nanoparticles
- computed tomography
- candida albicans
- sewage sludge