Phytosynthesis and radiation-assisted methods for obtaining metal nanoparticles

Fierăscu, Radu Claudiu; Fierăscu, Irina; Lungulescu, Eduard-Marius; Nicula, Nicoleta; Şomoghi, Raluca; Diţu, Lia Mara; Ungureanu, Camelia; Șuțan, Anca Nicoleta; Drăghiceanu, Oana Alexandra; Păunescu, Alina; Soare, Liliana Cristina

doi:10.1007/s10853-019-03713-3

Cited by 36 publications

(50 citation statements)

References 68 publications

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“…The variation of the antimicrobial and cytotoxic potential of the phytosynthesized nanoparticles (in comparison with the NPs that are obtained by using a radiation-assisted approach) was recently presented by our group [132] and supported the previously presented conclusion. Thus, although the phytosynthesized NPs had larger dimensions, their antimicrobial potential was higher (enhanced for the phytosynthesized NPs with lower dimensions).…”

Section: Recent Findings In the Morphology-properties Correlationsupporting

confidence: 84%

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

et al. 2020

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Phytosynthesized nanoparticles represent a continuously increasing field of research, with numerous studies published each year. However, with the emerging interest in this area, the quality of the published works is also continuously increasing, switching from routine antioxidant or antimicrobial studies on trivial microbial lines to antibiotic-resistant strains or antitumoral studies. However, this increasing interest has not been not reflected in the studies regarding the toxicological effects of nanoparticles (NPs); this should be a subject of greatest interest, as the increasing administration of NPs in general (and phytosynthesized NPs in particular) could lead to their accumulation in the environment (soil, water and living organisms). The present review aims to present the most recent findings in the application of phytosynthesized NPs as antimicrobial and antitumoral agents, as well as the results regarding their toxicological potential.Materials 2020, 13, 574 2 of 32 in terms of their toxic potential towards target organisms (leading to their proposal as antimicrobial [4], antiviral [5] or cytogenotoxic agents [6]), their possible negative toxicity has not been thoroughly established. The present review aims to present the advances that have been recorded in the last year in the area of phytosynthesized nanoparticle applications and toxicity studies, as well to underline the shortcomings of the encountered approach. The literature review survey was performed on multiple databases (Scopus, Web of Science, ScienceDirect, SpringerLink, PubMed) and used the main keywords "nanoparticles" and "extract" (as the term "phytosynthesis" was not adopted by all the authors). From the returned results, only the works that were published in the last year (2019) were selected. Furthermore, a supplementary selection was performed by using keywords as "antimicrobial," "cytotoxicity," and "toxicology" (results presented in Figure 1). The results of this preliminary selection led to the return of approximately 1800 unique works (from all the databases). A preliminary validation was manually performed (by reading the keywords and abstract) in order to remove the "false-positive" results. The final validation was performed by reading the entire manuscript. The criteria for inclusion in the present review were: (i) the use of phytosynthesized nanoparticles that were obtained in the laboratory; (ii) the existence of analytical studies for the characterization of the nanoparticles; and (iii) in-depth applications reports. The review is structured in different chapters for each potential application that is related to the toxic effect of the metallic nanoparticles.

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Section: Recent Findings In the Morphology-properties Correlationsupporting

confidence: 84%

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

et al. 2020

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“…Many perovskite or spinel type complex oxides have been found to have visible-light-driven photoactivity. The spinel ZnFe 2 O 4 with a relatively narrow band gap of about 1.9 eV was used in the solar energy, photocatalysis and photochemical hydrogen production from water due to its visible-light response, good photochemical stability and low cost [30]. As ZnFe 2 O 4 particles are magnetic semiconductor materials [19,20], ZnFe 2 O 4 based catalysts can be magnetically separable in a suspension system by virtue of their own magnetic properties without tedious work-up after the reaction.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light

et al. 2020

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Here, we report an efficient and highly selective oxidation of lignin model substrate using phyto-mediated ZnFe2O4 nanoparticle using Boswellia carterii extract. The nanocatalyst with an average size of 8 nm showed excellent photocatalytic activity of the synthesized carbonyl containing products under visible light irradiation. The catalytic activity and selectivity towards oxidation of vanillyl alcohol to vanillin with selectivity up to 99% at conversion over 98% and turn-over frequency values up to 1600 h−1 were obtained in the presence of H2O2 and base. The cubic spinel nano-ZnFe2O4 catalyst was characterized by powder-XRD, FESEM, HR-TEM and Mössbauer analysis. The demonstrated catalyst was robust and stable under the reaction conditions. Furthermore, it was easy to be separated from the reaction mixture and be reused for subsequent reactions up to 5 times without significant reactivity or selectivity loss.

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“…As previously stated, the plant extracts constituents act as reducing agents for metallic salts, also having the role as stabilizing/capping agents and inducing the polymorphism of the obtained nanoparticles. Moreover, the effect of nanoparticles is enhanced by the synergistic effect of bioactive compounds, especially in antimicrobial and antioxidant applications [ 137 ].…”

Section: Different Medicinal and Aromatic Plants—different Applicamentioning

confidence: 99%

Selected Aspects Related to Medicinal and Aromatic Plants as Alternative Sources of Bioactive Compounds

Fierăscu

Baroi

et al. 2021

IJMS

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Natural compounds obtained from different medicinal and aromatic plants have gained respect as alternative treatments to synthetic drugs, as well as raw materials for different applications (cosmetic, food and feed industries, environment protection, and many others). Based on a literature survey on dedicated databases, the aim of the present work is to be a critical discussion of aspects regarding classical extraction versus modern extraction techniques; possibilities to scale up (advantages and disadvantages of different extraction methods usually applied and the influence of extraction parameters); and different medicinal and aromatic plants’ different applications (medical and industrial applications, as well as the potential use in nanotechnology). As nowadays, research studies are directed toward the development of modern, innovative applications of the medicinal and aromatic plants, aspects regarding future perspectives are also discussed.

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Phytosynthesis and radiation-assisted methods for obtaining metal nanoparticles

Cited by 36 publications

References 68 publications

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

Phytosynthesized Metallic Nanoparticles—between Nanomedicine and Toxicology. A Brief Review of 2019′s Findings

Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light

Selected Aspects Related to Medicinal and Aromatic Plants as Alternative Sources of Bioactive Compounds

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