Green synthesis of silver nanoparticles from leaf extract of Tetrapleura tetraptera and its antimicrobial activity

Abstract

Plants have very high potential as alternative source of bio-reducing and capping agents in nanoparticles (NPs) synthesis. Silver nanoparticles (AgNPs) were synthesized from Tetrapleura tetraptera leaf extract. The UV-vis spectrophotometer was used to observe the formation of the NPs at various time intervals and ratios of leaf extract to AgNO3 solution. The properties of the AgNPs synthesized were characterized by FTIR and Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDX). Antimicrobial activities of the AgNPs synthesized were evaluated against ten human pathogens using agar well diffusion method. The rate of formation of the AgNPs was shown to increase with respect to time and ratio of leaf extract to AgNO3 solution. The EDX result showed signal energy peak for silver atom at 3.0-3.8 KeV. The AgNPs was characterized with FTIR peaks around 3280, 1620, 1400 and 1040 cm−1 assigned to O-H, C=O, C–O–H and C-C groups respectively, as possible stabilizing and capping groups. The AgNPs showed maximum inhibitory activity against Staphylococcus aureus, Escherichia coli and Salmonella sp.

Eco‐friendly synthesis of silver and gold nanoparticles with enhanced antimicrobial, antioxidant, and catalytic activities

“…In earlier works, the SPR band of silver nanoparticles synthesised by sunlight irradiation was observed at 428.7 nm [47]. The silver nanoparticles synthesised by heating of silver nitrate solution and S. nodiflora leaf extract showed SPR peak at 460 nm [48].…”

“…The nanoparticles could also inhibit DNA replication by reacting with the phosphorus or sulphur moieties of DNA [59]. It was reported that the silver nanoparticles synthesised by using S. nodiflora leaf extract with the aid of sunlight irradiation and heating methods also showed antimicrobial activities [47,48]. Also, the bactericidal activities of nanoparticles were higher for gram negative bacteria compared to gram positive bacteria.…”

“…The leaf extract acts as both reducing and stabilising agent for the formation of nanoparticles. The reports on the synthesis of silver nanoparticles using the leaf extract of S. nodiflora by sunlight irradiation [47] and heating [48] methods are already available. However, the novelty of the present work lies in the usage of S. nodiflora leaf extract for the synthesis of silver and gold nanoparticles by microwave irradiation and which results in the formation of nanoparticles in <30 s of time.…”

Physicochemical, thermal, and functional properties of gari (fermented‐cassava product) enriched with cowpea hull at different stages of production

“…The GC also displayed a sharp peak and multiple band absorption around 996 cm −1 in the fingerprint region which shows the vibration of the glucose C─O─C in the GC (Ogunsile et al, 2020). The result of this study relates to the report of Kayode et al (2021) on frozen cassava root which may be due to the fact that cassava roots is used for the production of gari as used in their study.…”

Biosynthesis, Characterization, and Antimicrobial Assessment of Metal Nanoparticles From Dryopteris Manniana (Hook.) C. CHR Leaf Extract

“…The plant extracts containing different concentrations and combinations of organic compounds such as alkaloids and flavonoids act both as reducing and stabilizing agents to reduce metallic salt to metallic nanoparticles 6&7 . Metal nanoparticles (MNPs) are NP obtained from the reduction of metal salts, they have a wide range of biomedical applications which include; their use as imaging-resource, multifunctional theranostic abilities, efficient antibacterial, antifungal, and antiviral agents, antitumor, and drug carrier properties [7][8][9][10] . Metal NPs exhibit unique physicochemical properties which are a result of their size and shape relationship 11&12 .…”