A Review On The Diverse Application Of Silver Nanoparticle

Thamilselvi, V.; Radha, K. V.

doi:10.9790/3013-0701012127

Cited by 21 publications

(14 citation statements)

References 49 publications

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“…The parameter 1/n F has a subunit value (1/n F -0.29), therefore the used adsorbent presents a good affinity for colloidal silver. Considering the heterogeneity factor 1 n s = 0.3, which represents a high deviation from unity, we conclude that the medical bandage adsorbent presents a heterogeneous surface. In addition, from the presented data it can observed that the lowest value of the correlation coefficient was obtained when the experimental data were modeled using Freundlich isotherm.…”

Section: Equilibrium Studiesmentioning

confidence: 92%

“…Technological development from the last decade lead to extensive usage of colloidal silver in different fields increasing the number of possible applications. Due to the mechanical and physical-chemical properties, colloidal silver is used in several fields: electronics, electrotechniques, biotechnology, bioenergy, textile and optical industries, pharmacy, medicine and environmental protection [1,2]. An extensive literature review proved that colloidal silver has a large number of applications: antibacterial agent [3,4], antifungal agent [5], antiviral agent [6], air disinfection [7], water disinfection [3], ground water biological wastewater treatment [8] and surface disinfection (antimicrobial paints, plastic catheters, gel formulation for specific usage, packing paper for food preservation, clinical clothing) [3].…”

Section: Introductionmentioning

confidence: 99%

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New Generation of Antibacterial Products Based on Colloidal Silver

et al. 2020

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The main objective of the present paper is the green synthesis of colloidal silver by ultrasonication starting from silver nitrate and using soluble starch as the reducing agent. Soluble starch has been used during synthesis because it is a cheap and environmentally friendly reactive. Silver colloid has been characterized by physicochemical methods: UV–VIS spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-Ray spectroscopy. This colloidal material was prepared in order to prove and establish its toxicity on heterotrophic bacteria. Toxicity tests were carried out using test cultures with and without silver colloid with different concentrations. This way was possible to establish the minimum silver concentration that presents a toxic effect against used bacteria. Quantitative evaluation of bacterial growth was performed by using the Most Probable Number method. By counting the bacterial colony number, the antibacterial effect was determined for colloidal silver deposited onto the cotton gauze by adsorption. During the present study, we optimized the adsorption specific parameters: solid:liquid ratio, temperature, contact time, colloidal silver concentration. By thermodynamic, equilibrium and kinetic studies, the adsorptive process mechanism was established.

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Section: Equilibrium Studiesmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

New Generation of Antibacterial Products Based on Colloidal Silver

et al. 2020

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“…They are used as thermal conductivity enhancers in various fluid media such as ethylene glycol, water, and oils. They are mainly used because of their stability without forming sedimentation for more prolonged periods [11].…”

Section: The Rationale Behind the Ternary Hybrid Synthesismentioning

confidence: 99%

Synthesis and Characterization of Novel Ternary Hybrid Nanoparticles as Thermal Additives in H2O

Zayan

Rasheed²,

John³

et al. 2021

Preprint

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The performance of water as a heat transfer medium in numerous applications is limited by its effective thermal conductivity. In order to improve the thermal conductivity of water, herein we report the development and thermophysical characterization of a novel metal-metaloxide-carbon based ternary hybrid nanoparticles (THNp), GO-TiO2-Ag and the rGO-TiO2-Ag. The results indicate that the graphene oxide and reduced graphene oxide based ternary hybrid nanoparticles dispersed in water enhance its thermal conductivity by 66% and 83%, respectively, even at very low concentrations. Mechanisms contributing to this significant enhancement are discussed. The experimental thermal conductivity is plotted against the existing empirical hybrid thermal conductivity correlations. We found that those correlations are not suitable for the metal-metaloxide-carbon combinations, calling for the developing a new thermal conductivity models. The rheological measurements of the nanofluids display non-Newtonian behavior, and the viscosity reduces with the increase in temperature. Such behavior is possibly due to the non-uniform shapes of the ternary hybrid nanoparticles.

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“…Silver is a non-essential, toxic metal capable of causing damage to biodiversity in aquatic systems worldwide. Growing applications of silver nanoparticles in industrial processes (Thamilselvi and Radha 2017 ) and the resulting increase in contamination of the environment have made silver an increasingly important pollutant to study. The bioavailability and toxicity of silver vary greatly depending on environmental conditions (Paquin and Di Toro 2008 ), life stage (Groh et al 2015 ), and mode of uptake (Hogstrand and Wood 1998 ).…”

Section: Introductionmentioning

confidence: 99%

Developmental exposure window influences silver toxicity but does not affect the susceptibility to subsequent exposures in zebrafish embryos

Robinson

Littler

Lange

et al. 2020

Histochem Cell Biol

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Silver is a non-essential, toxic metal widespread in freshwaters and capable of causing adverse effects to wildlife. Its toxic effects have been studied in detail but less is known about how sensitivity varies during development and whether pre-exposures affect tolerance upon re-exposure. We address these knowledge gaps using the zebrafish embryo (Danio rerio) model to investigate whether exposures encompassing stages of development prior to mid-blastula transition, when chorion hardening and epigenetic reprogramming occur, result in greater toxicity compared to those initiated after this period. We conducted exposures to silver initiated at 0.5 h post fertilisation (hpf) and 4 hpf to determine if toxicity differed. In parallel, we exposed embryos to the methylation inhibitor 5-azacytidine as a positive control. Toxicity increased when exposures started from 0.5 hpf compared to 4 hpf and LC50 were significantly lower by 1.2 and 7.6 times for silver and 5-azacyitidine, respectively. We then investigated whether pre-exposure to silver during early development (from 0.5 or 4 hpf) affected the outcome of subsequent exposures during the larvae stage, and found no alterations in toxicity compared to naïve larvae. Together, these data demonstrate that during early development zebrafish embryos are more sensitive to silver when experiments are initiated at the one-cell stage, but that pre-exposures do not influence the outcome of subsequent exposures, suggesting that no long-lasting memory capable of influencing future susceptibility was maintained under our experimental conditions. The finding that toxicity is greater for exposures initiated at the one-cell stage has implications for designing testing systems to assess chemical toxicity.

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A Review On The Diverse Application Of Silver Nanoparticle

Cited by 21 publications

References 49 publications

New Generation of Antibacterial Products Based on Colloidal Silver

New Generation of Antibacterial Products Based on Colloidal Silver

Synthesis and Characterization of Novel Ternary Hybrid Nanoparticles as Thermal Additives in H2O

Developmental exposure window influences silver toxicity but does not affect the susceptibility to subsequent exposures in zebrafish embryos

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