| Catalytic Evaluation of the Green synthesized Silver Nanoparticles using Weed Plant |
| Paper ID : 1076-UFGNSM-FULL |
| Authors: |
|
sepideh Hamedi *1, seyed Abbas Shojaosadati2 1Shahid Beheshti University, Po.Box: 47815-168, Zirab Campus 2Biotechnology group, Chemical Engineering Faculty, Tarbiat Modares University, P.O.Box:14115-114, Tehran, Iran |
| Abstract: |
| In recent years, silver nanoparticles (AgNPs) have attracted many researchers due to their wide ranges of application in: biosensing, optics, electronics, plasmonics, catalysis, medicine (cancer therapy), and antimicrobials. There are common physical and chemical methods for nanoparticle synthesis based on using high energy consumption or toxic materials, which have potential risks to environment and human health. Therefore, there is a growing need to develop a clean, non-toxic, cost-effective and eco-friendly being alternative method. In this research, a rapid green synthesis of the silver nanoparticles (AgNPs) using leaves extract of Convolvulus arvensis was investigated. UV-Visible spectra showed the SPR band at around 430 nm which proved the AgNP formation. The reduction of silver ions to nanoparticles was completed within 150 min. Particle size analysis verified the formation of AgNPs with average size of 28 nm, while their PDI was 0.2. SEM images verified the presence of spherical nanoparticles with no evidence of aggregations. The catalytic activity of the synthesized AgNPs was evaluated using the degradation of methylene blue (MB) dye in the presence of NaBH4. The presence of silver nanoparticles, accelerate the reduction rate of MB dye, while the reduction rate without AgNPs was very slow during the same period. The accelerated reduction of methylene blue in the presence of AgNPs with rate constant of 0.108 min-1, confirmed the catalytic potential of nanoparticles. It is found that silver nanoparticles catalyze the reduction of MB dye via facilitating the electron relay from BH_4^- (donor) to MB (acceptor). Macro-dilution method proved strong and dose-dependent antibacterial activity of AgNPs. |
| Keywords: |
| Silver nanoparaticles, Catalytic activity, Anticoagulant activity, Green synthesis, Weed plant |
| Status : Paper Accepted (Oral Presentation) |
