Silver nanoparticles in building materials for environment protection against microorganisms

Silva, G. D. da; Guidelli, Éder José; Queiroz-Fernandes, Geisiany Maria de; Chaves, Marcia R. M.; Baffa, Oswaldo; Kinoshita, Ângela

doi:10.1007/s13762-018-1773-0

Cited by 15 publications

(6 citation statements)

References 37 publications

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“…aeruginosa are similar to the corresponding 16 and 4–8 μg/mL for Ag 2 O nanoparticles. These ranges are at the lower end of the values reported in the literature for the case of silver nanoparticles. − Additionally, the antimicrobial activity of AgNbO 3 against clinical isolates obtained from the Detroit Medical Center was similar to its activity against ATCC strains of S. aureus and P.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, since often there is no tight control on the size and form distribution in a typical nanoparticle sample, it is difficult to find a correlation between the antimicrobial action and a particular physical property . Indeed, an extensive data analysis did not reveal a clear-cut dependence of MIC values on the particle sizes. − However, there have been suggestions that an increased level of contact between microbial cells and nanoparticles through the higher surface area (densities of edges and corner sites) is correlated with higher levels of antimicrobial activity. , There is some direct evidence for supporting this hypothesis, that is, antimicrobial effect through contact. Recently, Del Pilar Rodriguez-Torres and Díaz–Torres synthesized heparin-based silver nanoparticles that exhibited no antimicrobial activity.…”

Section: Resultsmentioning

confidence: 99%

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Nondegradable Antimicrobial Silver-Based Perovskite

Talebpour

Fani

Ouellette

et al. 2022

ACS Sustainable Chem. Eng.

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We synthesized nanostructured AgNbO 3 silver perovskite oxide, which prevents the proliferation of microbial cells without undergoing corrosion. The compound was tested for antimicrobial activity against Grampositive Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa. We confirmed that the antimicrobial activity of the compound was not related to its high dielectric and piezoelectric properties. While the measured activity, as quantified by the minimum inhibitory concentration, was similar to the activity of Ag 2 O particles subjected to the same mechanical treatments, the level of silver ion release of Ag 2 O was 60 times higher than that of AgNbO 3 . This indicated that the antimicrobial activity of AgNbO 3 is not due to corrosion resulting in silver ion release to the media.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Nondegradable Antimicrobial Silver-Based Perovskite

Talebpour

Fani

Ouellette

et al. 2022

ACS Sustainable Chem. Eng.

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“…[4] Among these, silver nanoparticles have attracted considerable attention due to their unique electronic, optical, mechanical, and catalytic properties, as well as excellent antibacterial properties, and ease of surface modification. Therefore, silver nanoparticles have great potential in various fields including biomedical materials, [5] chemical catalysts, [6] ceramic materials, [7] conductive pastes, [8] sewage treatment, [9] building materials, [10] light absorbing materials, [11] coatings, [12] sensors, [13] high performance electrode materials, [14] and more. They have developed into important topics for theoretical research and development of functional materials with unique properties.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for Synthesizing Ultra–Small Silver Nanoparticles Using Covalent Organic Frameworks as Template, Stabilizer and Reductant at Room Temperature

Yuan,

Su,

Zhang

et al. 2024

ChemistrySelect

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The preparation of ultra–small silver nanoparticles (average diameter ≤10 nm) is a technical problem because of their aggregation tendency. Therefore, the preparation conditions are usually harsh and complex. It is widely recognized that covalent organic frameworks (COFs) represent a novel class of porous crystalline compounds with broad applications in various fields. In this work, an environmentally and economically friendly new method has been developed for synthesizing ultra–small silver nanoparticles by reducing silver ions in ethanol solution with a covalent organic framework (TPB–DMTP–COF) as a template and reductant at room temperature. Interestingly, the TPB–DMTP–COF not only serves as a template and reductant but also functions as a stabilizer. Moreover, the TPB–DMTP–COF can be utilized repeatedly as a reductant. The morphology and structure of the silver nanoparticles were examined using transmission electron microscopy and showed that they were spherical with an average particle size of approximately 7.5 nm. Compared with the previously reported silver nanoparticles, the silver nanoparticles synthesized by this new method are not coated with Surfactant, such as Polyvinylpyrrolidone (PVP). As a result, they possess a larger exposed surface area, exhibit increased activity, and demonstrate excellent antimicrobial properties against both Gram–negative Escherichia coli and Gram–positive bacteria Staphylococcus aureus.

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“…But today, with the emergence of antibiotic-resistant strains, it has gained new interest [15]. Silver has been reported in several studies [16,17] as an effective bactericidal antibacterial agent. Gypsum composite with antibacterial components is also being developed and investigated [5], but some of its properties are still unknown.…”

Section: Introductionmentioning

confidence: 99%

Increasing the Biological Resistance of Gypsum by Means of Silver, Calcium and Copper Ions

Prošek

Sekavová

Ryparovà

2021

APP

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The article focuses on the effects of additives increasing biological resistance of gypsum against degradation of the material. In this study we use silver nitrate, calcium oxide and copper sulphate as an additive that improves biological resistance of gypsum composites. The amount of addition was calculated so that the amount of ions was 0.1, 0.3 and 0.5 wt. %. Microbial degradation was determined as the degree of resistance of materials to the occurrence of bacteria and molds by optical and electron microscope. The results obtained from these samples were compared with references materials created in the laboratory and available on today’s market. The results show a positive effect of silver and copper ions on the bioresistance of gypsum.

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Silver nanoparticles in building materials for environment protection against microorganisms

Cited by 15 publications

References 37 publications

Nondegradable Antimicrobial Silver-Based Perovskite

Nondegradable Antimicrobial Silver-Based Perovskite

A Novel Approach for Synthesizing Ultra–Small Silver Nanoparticles Using Covalent Organic Frameworks as Template, Stabilizer and Reductant at Room Temperature

Increasing the Biological Resistance of Gypsum by Means of Silver, Calcium and Copper Ions

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