Synthesis and Catalytic Evaluation of Silver Nanoparticles Synthesized with Aloysia triphylla Leaf Extract

López-Miranda, J. Luis; Borjas-García, S. E.; Esparza, Rodrigo; Rosas, G.

doi:10.1007/s10876-016-1062-3

Cited by 12 publications

(4 citation statements)

References 48 publications

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“…Therefore, A. triphylla is an excellent candidate for the green synthesis of gold nanoparticles due to its properties. To our knowledge, this plant only has been used before for silver nanoparticles in a previous report (López-Miranda et al 2016). In this work, we are proposing the synthesis of AuNPs using aqueous extracts of A. triphylla and evaluating the gold nanoparticles antibacterial and catalytic properties for medical and environmental applications.…”

Section: Introductionmentioning

confidence: 99%

Catalytic and antibacterial properties of gold nanoparticles synthesized by a green approach for bioremediation applications

et al. 2019

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In this work, we are proposing the green synthesis of gold nanoparticles (AuNPs) using aqueous extracts of A. triphylla and evaluating their antibacterial and catalytic properties. Characterization was performed by UV-Vis and FT-IR spectroscopies, X-ray diffraction, and transmission electron microscopy (TEM). Antibacterial activity of AuNPs was analyzed using E. coli and S. Aureus and catalytic activity was determined by the degradation of methylene blue and congo red. UV-Vis analysis showed an increase in AuNPs concentration by increasing the extract concentration, volume extract, and precursor salt concentration. The crystalline nature of AuNPs was corroborated by X-ray diffraction. TEM analysis showed nanoparticles with spherical morphology (mostly) and size between 40 and 60 nm. These results are novel because they showed a homogeneous morphology and a narrow size distribution which is difficult to obtain in green synthesis processes. Results of antibacterial activity showed inhibition zones of 11.3 mm and 10.6 mm for S. Aureus and E. coli, respectively, indicating the bactericidal capacity of the nanoparticles. The degradation periods for methylene blue and congo red were 5 and 11 min, respectively, which are very short compared with previous reports. These results are of great significance for catalytic applications. Therefore, A. triphylla extracts made possible AuNPs synthesis and the nanoparticles obtained can be used as catalytic and antibacterial materials for water remediation.

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Section: Introductionmentioning

confidence: 99%

Catalytic and antibacterial properties of gold nanoparticles synthesized by a green approach for bioremediation applications

et al. 2019

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“…Chemical reduction method is the most widely used way. However, some chemical regents used in this method to reduce or stabilise AgNPs are considered hazardous, which affected the biological applications of AgNPs [3, 4]. So biological processes are preferred for environmental and economic concerns.…”

Section: Introductionmentioning

confidence: 99%

“…Among all these active compounds, flavonoids and reducing sugars were proved to be the most important reductants during the synthetic process [12]. Synthesised AgNPs showed some good biomedical activities, for instance antimicrobial activity [13][14][15], catalytic activity [4] and antitumor activity [16].…”

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confidence: 99%

Antibacterial activity and catalytic activity of biosynthesised silver nanoparticles by flavonoids from petals of Lilium casa blanca

Luo

et al. 2018

Micro & Nano Letters

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Biosynthesis of silver nanoparticles (AgNPs) by flavonoids extracts from petals of Lilium casa blanca was reported. Reaction conditions such as pH, concentration of flavonoids or silver nitrite, reaction temperature and reaction time were optimised to control the formation of the AgNPs. Synthesised AgNPs were characterised by UV-Vis spectroscopy, transmission electron microscopy (TEM), dynamic light scattering (DLS), zeta potential measurement and Fourier transform infrared (FT-IR) spectroscopy. Stability, antibacterial and catalytic activities of the synthesised AgNPs were also discussed. The optimum synthetic conditions were 10 mL 20 mM AgNO 3 added to 1 mL flavonoids extracts, adjusting pH to 10, and reacted at 70°C for 1 h. The formation of AgNPs was confirmed by UV-Vis spectroscopic analysis, which showed maximum absorption peak at 404 nm. TEM analysis revealed spherical particles with size about 12.7 nm. FT-IR spectra revealed flavonoids were present on the surface of the AgNPs. AgNPs showed highest antibacterial activity against Escherichia coli and Salmonella, and the lesser antibacterial activity of AgNPs was found against Bacillus subtilis and Staphylococcus aureus. The biosynthesised AgNPs showed good catalytic activity as well by hydroboration of p-nitrophenol. Catalytic reduction followed pseudo-first-order kinetic.

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“…4C). The face-centred cubic (fcc) structure of metallic silver can be used to index the interplanar distances of the diffraction rings (Luis López-Miranda et al, 2016).…”

Section: Tem Analysismentioning

confidence: 99%

Studies on the Antimicrobial and Cytotoxic Effects of Silver Nanoparticles Synthesized from Homonoia riparia Lour Leaf Extract

C.H.L.D.S.,

2024

Intern. J. Bio. Env. Invest.

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Homonoia riparia Lour (H. riparia) leaf extract was used in the current study to reduce silver nitrate's chemical reduction, resulting in green synthesis of silver nanoparticles to test the antibacterial activity and cytotoxic effects. The plant H. riparia was chosen due to the presence of reducing agents and the need for more information on the synthesis of silver nanoparticles using said plant. Environmentally friendly method was developed in this study for synthesising AgNPs from Homonoia riparia Lour (H. riparia) leaf extract. UV-vis absorption, XRD, and EDX analyses verified the synthesis of AgNPs. Analysis by SEM and TEM revealed that AgNPs were roughly spherical in shape and 27 nm in size. Maximum absorbance was measured between 440 and 450 nm, the zeta potential was -23.4 mV, and the powder crystal structures were cubic. The absorbance of AgNPs peaked between 400 and 430 nm. The MICs (mg/ml) of the synthesised AgNPs on Staphylococcus aureus ATCC 29213, Escherichia coli ATCC 10536, Pseudomonas aeruginosa ATCC 15442, and Klebsiella pneumoniae producing carbapenemase ATCC BAA-2146 were tested. After verifying the preliminary analysis results, which showed that all of the tested samples have cytotoxic potential, their cytotoxic activity was again evaluated, this time against the same strains, to determine the IC50. Values were expressed as a percentage of cell growth inhibition at 50 against pathogenic microorganisms when used at lower doses and exhibit a more potent antibacterial effect.

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Synthesis and Catalytic Evaluation of Silver Nanoparticles Synthesized with Aloysia triphylla Leaf Extract

Cited by 12 publications

References 48 publications

Catalytic and antibacterial properties of gold nanoparticles synthesized by a green approach for bioremediation applications

Catalytic and antibacterial properties of gold nanoparticles synthesized by a green approach for bioremediation applications

Antibacterial activity and catalytic activity of biosynthesised silver nanoparticles by flavonoids from petals of Lilium casa blanca

Studies on the Antimicrobial and Cytotoxic Effects of Silver Nanoparticles Synthesized from Homonoia riparia Lour Leaf Extract

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