Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Pulit, Jolanta; Banach, Marcin

doi:10.1155/2014/658935

Cited by 14 publications

(12 citation statements)

References 36 publications

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“…These results suggest that the AuNPs are highly dispersed on the cellulose fiber, and this increase in metal nanoparticle dispersion results in increased interaction among AuNPs, leading to broadening of the SPR. A similar result was observed by Pulit and Banach (2014) in the preparation of AuNPs using Dog Rose aqueous extract as a reducing agent. They found that the higher concentrations of gold ions involved in the synthesis resulted in lower and broader UV-Vis absorption spectra of AuNPs because of the formation of larger particles as well as a polymodal size distribution.…”

Section: +supporting

confidence: 85%

In-situ Green Synthesis of Gold Nanoparticles using Unbleached Kraft Pulp

Bumbudsanpharoke¹,

Ko²

2015

BioResources

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Facile green synthesis of gold nanoparticles (AuNPs) on cellulose fiber was successfully achieved by reducing chloroauric acid (HAuCl4·3H2O) by means of unbleached kraft pulp. A significant color change in pulp fiber indicating the in-situ formation of gold was observed with one-step synthesis in an autoclave. As-prepared AuNP-cellulose fiber nanocomposites were thoroughly characterized by UV-Vis diffuse reflectance spectroscopy (DRS), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Gold nanoparticles were uniformly dispersed on the surface of the fiber by the bio-reduction of Au 3+ from metal salt to Au 0 with the α-carbonyl group and conjugated carbonyl of phenolic groups of lignin. The AuNPs formed on cellulose fibers were estimated to have average sizes of approximately 12.5, 12.4, 16.4, and 21.0 nm, depending on the concentration of Au 3+ involved in the synthesis.

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Section: +supporting

confidence: 85%

In-situ Green Synthesis of Gold Nanoparticles using Unbleached Kraft Pulp

Bumbudsanpharoke¹,

Ko²

2015

BioResources

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“…Previously, diverse plants have been investigated regarding forming silver nanoparticles [19][20][21]. More than sixty plants used for green AgNP synthesis were summarized [11,14], but Phyllanthus urinaria (P. urinaria), Pouzolzia zeylanica (P. zeylanica), and Scoparia dulcis (S. dulcis) are plants of interest that have not yet been explored.…”

Section: Introductionmentioning

confidence: 99%

Green Silver Nanoparticles Formed by Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis Leaf Extracts and the Antifungal Activity

et al. 2020

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Phytoconstituents presenting in herbal plant broths are the biocompatible, regenerative, and cost-effective sources that can be utilized for green synthesis of silver nanoparticles. Different plant extracts can form nanoparticles with specific sizes, shapes, and properties. In the study, we prepared silver nanoparticles (P.uri.AgNPs, P.zey.AgNPs, and S.dul.AgNPs) based on three kinds of leaf extracts (Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis, respectively) and demonstrated the antifungal capacity. The silver nanoparticles were simply formed by adding silver nitrate to leaf extracts without using any reducing agents or stabilizers. Formation and physicochemical properties of these silver nanoparticles were characterized by UV-vis, Fourier transforms infrared spectroscopy, scanning electron microscope, transmission electron microscope, and energy dispersive X-ray spectroscopy. P.uri.AgNPs were 28.3 nm and spherical. P.zey.AgNPs were 26.7 nm with hexagon or triangle morphologies. Spherical S.dul.AgNPs were formed and they were relatively smaller than others. P.uri.AgNPs, P.zey.AgNPs and S.dul.AgNPs exhibited the antifungal ability effective against Aspergillus niger, Aspergillus flavus, and Fusarium oxysporum, demonstrating their potentials as fungicides in the biomedical and agricultural applications.

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“…Microbial nanosynthesis takes a long period of time to obtain adequate synthetic biomass and also the same biomass cannot be reused for another synthesis [ 3 ]. The use of plant sources in nanoparticle synthesis is a more preferred route due to a shorter period of synthesis and also due to the fact that most plant sources satisfy the roles of stabilising, reducing, and capping effects, thereby limiting the amount of raw materials and promoting green technologies [ 4 ]. Other advantages of phytonanotechnology include the safer nature of synthesis, biocompatibility, non-toxic nature, cost-effectiveness, sustainability, and environmental friendliness, as well as a lack of underlined special culture preparation and isolation techniques [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Ag/Ag2O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities

Elemike

Onwudiwe

Ekennia³

et al. 2017

Molecules

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The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial organisms and parasites. The present work reports the antimicrobial and larvicidal potential of biosynthesized Ag/Ag2O nanoparticles using aqueous leaf extract of Eupatorium odoratum (EO). The constituents of the leaf extract act as both reducing and stabilizing agents. The UV-VIS spectra of the nanoparticles showed surface plasmon resonance. The particle size and shape of the nanoparticles was analysed by transmission electron microscopy (TEM). The larvicidal study was carried out using third and fourth instar Culex quinquefasciatus larvae. The mosquito larvae were exposed to varying concentrations of plant extract (EO) and the synthesized nanoparticles, and their percentage of mortality was accounted for at different time intervals of 12 h and 24 h periods of exposure. The nanoparticles were more lethal against third and fourth instars of Culex quinquefasciatus larvae at the 24 h period of exposure with lower lethal concentration values (LC50 = 95.9 ppm; LC90 = 337.5 ppm) and (LC50 = 166.4 ppm; LC90 = 438.7 ppm) compared to the plant extract (LC50 = 396.8 ppm; LC90 = 716.8 ppm and LC50 = 448.3 ppm; LC90 = 803.9 ppm, respectively). The antimicrobial properties of the nanoparticles were established against different clinically-isolated microbial strains and compared to that of the plant extract (EO) and standard antimicrobial drugs. The nanoparticles were generally more active than the plant extract against the selected microbial organisms. The Gram-negative bacterial strains Escheerichua coli and Salmonella typhi were more susceptible towards the nanoparticles compared to the Gram-positive strains and the fungal organism.

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Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Cited by 14 publications

References 36 publications

In-situ Green Synthesis of Gold Nanoparticles using Unbleached Kraft Pulp

In-situ Green Synthesis of Gold Nanoparticles using Unbleached Kraft Pulp

Green Silver Nanoparticles Formed by Phyllanthus urinaria, Pouzolzia zeylanica, and Scoparia dulcis Leaf Extracts and the Antifungal Activity

Green Synthesis of Ag/Ag2O Nanoparticles Using Aqueous Leaf Extract of Eupatorium odoratum and Its Antimicrobial and Mosquito Larvicidal Activities

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