Biogenic synthesis of gold and silver nanoparticles used in environmental applications: A review

Heinemann, Mônika Grazielle; Rosa, Clarissa H.; Rosa, Gilber R.; Dias, Daiane

doi:10.1016/j.teac.2021.e00129

Cited by 61 publications

(17 citation statements)

References 53 publications

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“…These values are within the range of those reported in literature, between −24.9 mV and −32.3 mV for AgNPs synthesized using turnip leaf extract ( Brassica rapa L. ) [ 58 ], Melia azedarach extract [ 60 ], Rubus rosifolius fruit extract [ 61 ], Tridax procumbens plant extract [ 69 ], fresh leaves of Mentha piperita and Amaranthus retroflexus [ 20 ]. The high stability of the nanoparticles is attributed to the phytogenic content, such as terpenes and polysaccharides, which can act as surfactants [ 70 , 71 ]. The distribution of the zeta potential for ration 1:3 is depicted in Figure 7 b.…”

Section: Resultsmentioning

confidence: 99%

Design of Green Silver Nanoparticles Based on Primula Officinalis Extract for Textile Preservation

et al. 2022

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The present study aims to bring an addition to biomass resources valorization for environmental-friendly synthesis of nanoparticles. Thus, the green synthesis of silver nanoparticles (AgNPs) was performed, using a novel and effective reducing agent, Primula officinalis extract. The synthesis was optimized by monitoring the characteristic absorption bands, using UV–Vis spectroscopy, and by evaluating the size and physical stability. The phenolic consumption was established using Folin-Ciocâlteu method (1.40 ± 0.42 mg, representing ~5% from the total amount of poly--phenols) and the antioxidant activity was evaluated using chemiluminescence and TEAC methods. The optimum ratio extract to Ag ions was 1:3, for which the AgNPs presented a zeta potential value of −29.3 ± 1.2 mV and particles size of 5-30 nm. For characterization, EDS and XRD techniques were used, along with microscopy techniques (TEM). The AgNPs dispersions were applied on natural textile samples (cotton and wool), as a novel antimicrobial treatment for textile preservation. The treated fabrics were further characterized in terms of chromatic parameters and antimicrobial effect against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Penicillium hirsutum strains. The high percentages of bacterial reduction, >99%, revealed that the AgNPs produced are a good candidate for textiles preservation against microbial degradation.

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Section: Resultsmentioning

confidence: 99%

Design of Green Silver Nanoparticles Based on Primula Officinalis Extract for Textile Preservation

et al. 2022

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“…20,21,25 Silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) are the most common ones used for chemical, electrochemical, biomedical and environmental applications. 42 Owing to their high surface-to-volume ratio and unique physicochemical properties, AgNPs possess various important characteristics: high catalytic activity, electrical and thermal conductivity, as well as broad-spectrum bioactivities. 43,44 In medicine AgNPs have received tremendous attention for their excellent antimicrobial, antibacterial and anticancer potential.…”

Section: Green Synthesis Of Metal/metal Oxide Nanoparticles Using Plantsmentioning

confidence: 99%

Application of biosynthesized metal nanoparticles in electrochemical sensors

et al. 2022

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Recently, the development of eco-friendly, cost-effective and reliable methods for synthesis of metal nanoparticles has drawn a considerable attention. The so-called green synthesis, using mild reaction conditions and natural resources as plant extracts and microorganisms, has established as a convenient, sustainable, cheap and environmentally safe approach for synthesis of a wide range of nanomaterials. Over the past decade, biosynthesis is regarded as an important tool for reducing the harmful effects of traditional nanoparticle synthesis methods commonly used in laboratories and industry. This review emphasizes the significance of biosynthesized metal nanoparticles in the field of electrochemical sensing. There is increasing evidence that green synthesis of nanoparticles provides a new direction in designing of cost-effective, highly sensitive and selective electrode-catalysts applicable in food, clinical and environmental analysis. The article is based on 157 references and provided a detailed overview on the main approaches for green synthesis of metal nanoparticles and their applications in designing of electrochemical sensor devices. Important operational characteristics including sensitivity, dynamic range, limit of detection, as well as data on stability and reproducibility of sensors have also been covered. Keywords: biosynthesis; green synthesis; nanomaterials; nanotechnology; modified electrodes

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“…Recently, several reviews have been reported on the synthesis and application of silver as an antimicrobial agent, transparent conducting electrode, and catalyst for the reduction of contaminants. [21][22][23][24][25] However, in the last decade, silver has attracted increasing attention in the field of EMI shielding, as shown in Fig. 1, given that it possesses ultrahigh electrical conductivity (6.31 Â 10 5 S cm À1 ), [26][27][28] which is higher than that of copper (5.96 Â 10 5 S cm À1 ), nickel (1.46 Â 10 5 S cm À1 ) and iron (1.03 Â 10 5 S cm À1 ).…”

Section: Introductionmentioning

confidence: 99%

Recent advances and perspectives on silver-based polymer composites for electromagnetic interference shielding

et al. 2023

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Biogenic synthesis of gold and silver nanoparticles used in environmental applications: A review

Cited by 61 publications

References 53 publications

Design of Green Silver Nanoparticles Based on Primula Officinalis Extract for Textile Preservation

Design of Green Silver Nanoparticles Based on Primula Officinalis Extract for Textile Preservation

Application of biosynthesized metal nanoparticles in electrochemical sensors

Recent advances and perspectives on silver-based polymer composites for electromagnetic interference shielding

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