Green synthesis of silver nanoparticles from<i>Echinacea purpurea</i>(L.) Moench with antioxidant profile

Geçer, Esma Nur; Erenler, Ram­azan; Genç, Nusret; Yildiz, İlyas

doi:10.1080/02726351.2021.1904309

Cited by 59 publications

(21 citation statements)

References 39 publications

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“…Gecer et al [ 22 ] used the aqueous extract from the aerial parts of echinacea for the phytosynthesis of silver nanoparticles with an average size of 68.24 nm (determined via scanning electron microscopy) and the nanoparticles exhibited very promising antioxidant activity (as determined by DPPH, ABTS, and ferric reducing power assays).…”

Section: Introductionmentioning

confidence: 99%

Phytosynthesis of Biological Active Silver Nanoparticles Using Echinacea purpurea L. Extracts

et al. 2022

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With their phytoconstituents acting as reducing and capping agents, natural extracts can be considered a viable alternative for the obtaining of metallic nanoparticles. The properties of phytosynthesized nanoparticles are dependent upon size and morphology, which, in turn, can be tailored by adjusting different parameters of the phytosynthesis process (such as the extracts’ composition). In the present study, we aimed to evaluate, for the first time in the literature, the influence of the extraction method and extract concentration on the morphological and biological properties (antioxidant and antibacterial activity) of silver nanoparticles phytosynthesized using Echinacea pupurea L. extracts. The obtained results revealed that the use of the low-concentration Echinacea hydro-alcoholic extract obtained via classical temperature extraction led to the development of nanoparticles with the smallest dimensions (less than 10 nm), compared with the use of extracts obtained with higher concentrations and the extract obtained via the microwave method. The developed nanomaterials exhibited enhanced antioxidant effects (determined via the DPPH assay) and antimicrobial properties (against Escherichia coli and Candida albicans), compared with the parent extracts.

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Section: Introductionmentioning

confidence: 99%

Phytosynthesis of Biological Active Silver Nanoparticles Using Echinacea purpurea L. Extracts

et al. 2022

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“…The biological effects of AgNPs depend on some crucial factors such as surface chemistry, size, shape, particle morphology, particle composition, coating/capping, agglomeration, and dissolution rate, particle reactivity in solution, the e ciency of ion release, cell type, the type of reducing agent [9]. AgNPs synthesised from plants were reported to show signi cant biological activities such as antioxidant [10], antibacterial [11], anticancer [12,13], antifungal [14], antiviral [15], anti-in ammatory [16].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles from Salvia aethiopis L. and Their Antioxidant Activity

Geçer

2021

J Inorg Organomet Polym

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Salvia aethiopis L. was heated in distilled water for 2 hours. After ltration, water extract was treated with silver nitrate for 2 hours at 60°C to yield the silver nanoparticles (Sa-AgNPs). The structure of silver nanoparticles was elucidated by spectroscopic methods such as Ultraviolet-visible (UV-Vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Scanning electron microscope (SEM). The maximum absorption in UV-Vis spectrum was observed at 508 nm. XRD pattern at (2θ) 38.1°, 44.3°, 64.4°, and 77.4° degrees can be assigned to the (111), ( 200), ( 220) and (311) Bragg's re ections of the face-centered cubic crystalline structure. The average size of Sa-AgNPs was found as 74.09 nm by SEM analysis. The characteristic hydroxyl vibration signal appeared at 3222 cm − 1 . Antioxidant activity of extract and Sa-AgNPs were carried out using DPPH • , ABTS •+ FRAP assay. The Sa-AgNPs revealed the considerable ABTS •+ scavenging effect with the value of 4.93 (IC 50 , µg/mL) compared to BHT (IC 50 , µg/mL, 8.34). However, Sa-AgNPs displayed the lower DPPH • activity (IC 50 , µg/mL, 24.37) than that of the standard BHT (IC 50 , µg/mL, 9.67). The reducing power activity of Sa-AgNPs was found as 4.52 (µmol TE/mg extract) while the standard BHT value was 488 (µmol TE/mg extract).

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“…Empyrean, Malvern Panalytical diffractometer was utilized for X-ray diffraction (XRD) analysis to determine the crystal structure of AgNPs. Quanta Feg450 was used for scanning electron microscope (SEM) analysis to reveal the morphology of AgNPs (Gecer et al, 2022).…”

Section: Characterisation Of Nanostructuresmentioning

confidence: 99%

Green synthesis of silver nanoparticles from Astragalus logopodioides L. leaves

Erenler¹,

Geçer²

2022

Turkish JAF Sci.Tech.

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Natural products have gained great interest due to their broad spectrum of biological activities and bioactive compounds. In this study, silver nanoparticles (AgNPs) were synthesized using Astragalus logopodioides L. by green approach. The structure of AgNPs was elucidated by spectroscopic techniques. UV-Vis spectrum presented the maximum absorption of AgNPs as 419 nm. The crystal structure of AgNPs was assigned as face centered cubic by X-ray diffraction (XRD) pattern. Scanning electron microscope (SEM) established morphology of AgNPs with an average size of 36.4 nm. A. logopodioides included the bioactive compounds, So, AgNPs capped by these compounds could be valuable substances for food and pharmaceutical applications.

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Green synthesis of silver nanoparticles fromEchinacea purpurea(L.) Moench with antioxidant profile

Cited by 59 publications

References 39 publications

Phytosynthesis of Biological Active Silver Nanoparticles Using Echinacea purpurea L. Extracts

Phytosynthesis of Biological Active Silver Nanoparticles Using Echinacea purpurea L. Extracts

Green Synthesis of Silver Nanoparticles from Salvia aethiopis L. and Their Antioxidant Activity

Green synthesis of silver nanoparticles from Astragalus logopodioides L. leaves

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