Green Synthesis of Silver Nanoparticles Using Tabebuia Aurea Leaf Extract

Prathibha, B.S.; Priya, K. Shanmuga

doi:10.9790/5736-1006012329

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…In addition, Ag NPs have proved to be excellent catalysts in a variety of reactions with high activity and durability due to their different shapes and sizes, which give rise to distinctive quantum properties. Table summarizes some of the reports pertaining to the biosynthesis of Ag‐based nanostructures mediated by various plant extracts …”

Section: Introductionmentioning

confidence: 99%

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Nasrollahzadeh

Yek

Motahharifar

et al. 2019

The Chemical Record

147

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Among different metallic nanoparticles, sliver nanoparticles (Ag NPs) are one of the most essential and fascinating nanomaterials. Importantly, among the metal based nanoparticles, Ag NPs play a key role in various fields such as biomedicine, biosensors, catalysis, pharmaceuticals, nanoscience and nanotechnology, particularly in nanomedicine. A main concern about the chemical synthesis of Ag NPs is the production of hazardous chemicals and toxic wastes. To overcome this problem, many research studies have been carried out on the green synthesis of Ag NPs using green sources such as plant extracts, microorganisms and some biopolymers without formation of hazardous wastes. Among green sources, plants could be remarkably valuable to exploring the biosynthesis of Ag NPs. In this review, the green synthesis of Ag‐based nanocatalysts such as Ag NPs, AgPd NPs, Au−Ag NPs, Ag/AgPd NPs, Ag/Cu NPs, Ag@AgCl NPs, Au−Ag@AgCl nanocomposite, Ag−Cr‐AC nanocomposite and Ag NPs immobilized on various supports such as Natrolite zeolite, bone, ZnO, seashell, hazelnut shell, almond shell, SnO2, perlite, ZrO2, TiO2, α‐Al2O3, CeO2, reduced graphene oxide (rGO), h‐Fe2O3@SiO2, and Fe3O4 using numerous plant extracts as reducing and stabilizing agents in the absence of hazardous surfactant and capping agents has been focused. This work describes the state of the art and future challenges in the biosynthesis of Ag‐based nanocatalysts. The fact about the application of living plants in metal nanoparticle (MNPs) industry is that it is a more economical and efficient biosynthesis biosynthetic procedure. In addition, the catalytic activities of the synthesized, Ag‐based recyclable nanocatalysts using various plant extracts in several chemical reactions such as oxidation, reduction, coupling, cycloaddition, cyanation, epoxidation, hydration, degradation and hydrogenation reactions have bben extensively discussed.

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Section: Introductionmentioning

confidence: 99%

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Nasrollahzadeh

Yek

Motahharifar

et al. 2019

The Chemical Record

147

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“…In the DPPH assay (Figure 5B), the unfermented AgNPs reaction solution had the highest antioxidant activity of 47.58%, while the fermented AgNPs reaction solution had the minimum antioxidant activity (33.03%). The highest antioxidant activity of unfermented AgNPs is probably linked to the adsorption of phytochemicals over ball-shaped AgNPs [43]. The results indicate that unfermented AgNPs are the most effective scavenger against DPPH compared to fermented AgNPs.…”

Section: Antioxidant Properties Of Green Synthesized Silver Nanoparti...mentioning

confidence: 87%

“…The emergence of absorption peaks at 450 nm in fermented AgNPs and 457 nm in unfermented AgNPs (Figure 2B) detected by UV-vis spectroscopy indicates AgNPs formation. The creation of a single peak in both green synthesized AgNPs shows the synthesis of spherical silver nanoparticles [43]. Different researchers have conducted similar studies using UV-vis, including the aqueous extract of Satureja by Somaye et al [45].…”

Section: Visual Observation and Uv-visible Spectroscopy Of The Green ...mentioning

confidence: 99%

“…The samples were observed under a UV-vis spectrophotometer for their maximum absorbance and wavelength to confirm AgNP formation. The SPR absorption band is formed due to the simultaneous vibration of free electrons in metal nanoparticles in resonance with light waves [43]. Fermented AgNPs had a broad spectrum, indicating that they contain large AgNPs (Figure 2A).…”

Section: Visual Observation and Uv-visible Spectroscopy Of The Green ...mentioning

confidence: 99%

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Biosynthesis of Silver Nanoparticles from Fermented Bush Tea (Athrixia phylicoides DC) Leaf Extract and Evaluation of Their Antioxidant and Antimicrobial Properties

Mashau,

Mamagau,

Foforane

et al. 2023

Fermentation

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Green synthesis is a promising strategy for producing eco-friendly, non-toxic, and less expensive metallic nanoparticles from plants and microorganisms. This research synthesized silver nanoparticles (AgNPs) from fermented leaf extract of bush tea (Athrixia phylicoides DC). The physicochemical characterization of AgNPs was conducted by UV-vis spectroscopy, Fourier Transform Infrared Spectrometry (FTIR), and Differential Scanning Calorimetry (DSC). In addition, the total phenolic and flavonoid contents, antioxidant and antimicrobial activities of AgNPs were evaluated. The results indicated the successful formation of AgNPs by a visual change of color in fermented bush tea leaf extract from black to brown and in unfermented bush tea leaf crude extract from dark brown to light brown. The UV-vis spectrum of the reaction of the mixture of synthesized AgNPs with unfermented and fermented bush tea showed maximum absorbance at 457 nm and 450 nm, which confirmed the formation of AgNPs. FTIR revealed the functional groups of a leaf extract from bush tea that contributed to the reduction and capping process. The thermal properties suggest that low thermal stable compounds contributed to the reduction of Ag+ to Ag° in the phyto compounds found in the extract. The total phenolic content was higher in fermented AgNPs (290.44 mg/g GAE) compared to unfermented AgNPs (171.34 mg/g GAE). On the other hand, the total flavonoid content was higher in unfermented AgNPs (17.87 mg/g CE) than in fermented AgNPs (9.98 mg/g CE). Regarding antioxidant activity values, unfermented AgNPs had the highest FRAP (535.30 TE/mL) and 47.58% for DPPH. Fermented AgNPs had more antimicrobial activity than unfermented AgNPs. The results show that bush tea leaf extract can be used in different industries such as food, cosmetics, and biomedical.

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Structural characterization of cuboidal α-Fe2O3 nanoparticles synthesized by a facile approach

et al. 2023

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Abstractα-Fe2O3 nanoparticles were synthesized using Tabebuia aurea leaf extract by a facile approach. The signature peaks for Fe and O in the EDX spectrum verified the formation of Fe2O3 nanoparticles. Cuboidal-shaped nanoparticles were observed in the FE-SEM image. In the XRD pattern, it was observed that the peaks belong to α-Fe2O3 nanoparticles. These particles were pure and crystalline with an average particle size of 25.69 nm. The signals at 538 and 494 cm−1 in the FTIR image confirmed the formation of hematite nanoparticles. BET analysis showed a comparatively greater surface area (31.03 m2/g) than the commercial α-Fe2O3 nanoparticles, and the pores were mesoporous. XPS analysis confirmed the existence of α-Fe2O3 by showing the specific oxidation states for iron and oxygen at 710.34 and 529.67 eV, respectively. The saturation magnetization value of 13.97 emu/g confirmed the superparamagnetic nature. The TGA, which determined the thermal stability of the nanoparticles, reported a total weight loss of 12.75%. Hence, the highly crystalline, pure, mesoporous, superparamagnetic α-Fe2O3 nanoparticles with high surface area synthesized using T. aurea leaf extract can be potentially applied in diverse fields.

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Green Synthesis of Silver Nanoparticles Using Tabebuia Aurea Leaf Extract

Cited by 9 publications

References 6 publications

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Biosynthesis of Silver Nanoparticles from Fermented Bush Tea (Athrixia phylicoides DC) Leaf Extract and Evaluation of Their Antioxidant and Antimicrobial Properties

Structural characterization of cuboidal α-Fe2O3 nanoparticles synthesized by a facile approach

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