Biomimetic synthesis, characterization and antibacterial efficacy of ZnO and Au nanoparticles using echinacea flower extract precursor

Attar, Azade; Yapaöz, Melda Altıkatoğlu

doi:10.1088/2053-1591/aac05f

Cited by 27 publications

(6 citation statements)

References 30 publications

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“…SEM depicted both individual and some aggregate NPs with a consistent average size of 85-89 nm, precisely 87.5 ± 14.45 nm in ZnO NPs/TPL, 85.43 ± 7.11 nm in ZnO NPs/TPS, and 88.14 ± 9.15 nm in ZnO NPs/TPF. SEM images of biomimetically synthesized ZnO NPs obtained from T. purpurea extract proved that the NPs are smaller than those reported previously [48]. As a complementary technique, TEM analysis was performed to identify the morphology, nature, and size of the phytosynthesized ZnO NPs.…”

Section: Surface Morphological Analysismentioning

confidence: 94%

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Biomimetic Synthesis, Characterization, and Evaluation of Fluorescence Resonance Energy Transfer, Photoluminescence, and Photocatalytic Activity of Zinc Oxide Nanoparticles

Wijesinghe¹,

Thiripuranathar²,

Iqbal

et al. 2021

Sustainability

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Owing to the development of nanotechnology, biosynthesis of nanoparticles (NPs) is gaining considerable attention as a cost-effective and eco-friendly approach that minimizes the effects of toxic chemicals used in NP fabrication. The present work reports low-cost phytofabrication of zinc oxide (ZnO) NPs employing aqueous extracts of various parts (leaves, stems, and inflorescences) of Tephrosia purpurea (T. purpurea). The formation, structure, morphology, and other physicochemical properties of ZnO NPs were characterized by ultraviolet–visible (UV–Vis) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and dynamic light scattering (DLS). UV–Vis spectral analysis revealed sharp surface plasmon resonance (SPR) at around 250–280 nm, while the XRD patterns confirmed distinctive peaks indices to the crystalline planes of hexagonal wurtzite ZnO NPs. TEM analysis confirmed the presence of spherical-shaped ZnO NPs with average particle sizes (PS) between 25–35 nm, which was in agreement with the XRD results. FTIR analysis revealed that phenolics, flavonoids, amides, alkaloids, and amines present in the plant extract are responsible for the stabilization of the ZnO NPs. Further, the hydrodynamic diameter in the range of 85–150 nm was measured using the DLS technique. The fluorescence resonance energy transfer (FRET) ability of biogenic ZnO NPs was evaluated, and the highest efficiency was found in ZnO NPssynthesized via T. purpurea inflorescences extract. Photoluminescence (PL) spectra of biogenic ZnO NPs showed three emission peaks consisting of a UV–Vis region with high-intensity compared to that of chemically synthesized ZnO NPs. The biosynthesized ZnO NPs showed photocatalytic activity under solar irradiation by enhancing the degradation rate of methylene blue (MB). Among the prepared biogenic ZnO NPs, T. purpurea leaves mediated with NPs acted as the most effective photocatalyst, with a maximum degradation efficiency of 98.86% and a half-life of 84.7 min. This is the first report related to the synthesis of multifunctional ZnO NPs using T. purpurea, with interesting characteristics for various potential applications in the future.

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Section: Surface Morphological Analysismentioning

confidence: 94%

“…Thus, the involvement of these secondary metabolites as capping agents induced NP stabilization, thus aiding the formation of ZnO NPs [8,23,48,49].…”

Section: Ftir Spectroscopic Analysismentioning

confidence: 99%

Biomimetic Synthesis, Characterization, and Evaluation of Fluorescence Resonance Energy Transfer, Photoluminescence, and Photocatalytic Activity of Zinc Oxide Nanoparticles

Wijesinghe¹,

Thiripuranathar²,

Iqbal

et al. 2021

Sustainability

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“…Due to their non-toxic character, different types of materials based on natural compounds from Echinacea extracts have been developed, especially for medical applications. Extracts encapsulated in chitosan nanoparticles have been used for the treatment of diabetes [ 17 ], hematite nanoparticles have been developed for their anti-bacterial activity against different species of bacteria [ 18 ], gold nanoparticles for their antioxidant effects [ 19 ] or zinc oxide nanoparticles for their antibacterial effects [ 20 ]. Oxyhydroxide nanoparticles have also been developed using a mixture of rosemary and Echinacea phenolic extracts, and their cytotoxic effect on A549 human lung adenocarcinoma cells led to the conclusion that the developed materials demonstrated significant anticancer effects [ 21 ].…”

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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“…In most microwave-assisted green synthesis, the nanoparticles obtained have quasi-spherical morphology, and only a few have crystallinity studies [ 40 ]. Nanoparticles with good crystallinity are obtained when the pH is adjusted to alkaline with sodium hydroxide [ 41 ], and a calcination postsynthesis step is added to improve the performances of the obtained nanopowders [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial and Photocatalytic Properties of ZnO Nanoparticles Obtained from Chemical versus Saponaria officinalis Extract-Mediated Synthesis

et al. 2021

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In the present work, the properties of ZnO nanoparticles obtained using an eco-friendly synthesis (biomediated methods in microwave irradiation) were studied. Saponaria officinalis extracts were used as both reducing and capping agents in the green nanochemistry synthesis of ZnO. Inorganic zinc oxide nanopowders were successfully prepared by a modified hydrothermal method and plant extract-mediated method. The influence of microwave irradiation was studied in both cases. The size, composition, crystallinity and morphology of inorganic nanoparticles (NPs) were investigated using dynamic light scattering (DLS), powder X-ray diffraction (XRD), SEM-EDX microscopy. Tunings of the nanochemistry reaction conditions (Zn precursor, structuring agent), ZnO NPs with various shapes were obtained, from quasi-spherical to flower-like. The optical properties and photocatalytic activity (degradation of methylene blue as model compound) were also investigated. ZnO nanopowders’ antibacterial activity was tested against Gram-positive and Gram-negative bacterial strains to evidence the influence of the vegetal extract-mediated synthesis on the biological activity.

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Biomimetic synthesis, characterization and antibacterial efficacy of ZnO and Au nanoparticles using echinacea flower extract precursor

Cited by 27 publications

References 30 publications

Biomimetic Synthesis, Characterization, and Evaluation of Fluorescence Resonance Energy Transfer, Photoluminescence, and Photocatalytic Activity of Zinc Oxide Nanoparticles

Biomimetic Synthesis, Characterization, and Evaluation of Fluorescence Resonance Energy Transfer, Photoluminescence, and Photocatalytic Activity of Zinc Oxide Nanoparticles

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

Antibacterial and Photocatalytic Properties of ZnO Nanoparticles Obtained from Chemical versus Saponaria officinalis Extract-Mediated Synthesis

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