Synthesis and catalytic applications of silver nanoparticles: a sustainable chemical approach using indigenous reducing and capping agents from <i>Hyptis capitata</i>

Revathy, R; Joseph, Jose; Augustine, Cyril; Sajini, T.; Mathew, Beena

doi:10.1039/d2va00044j

Cited by 6 publications

(5 citation statements)

References 36 publications

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“…A recent study has highlighted the synthesis of Ag-and Au-NPs from extracts of lemongrass leaf. For example synthesis of Au-NPs by using leaves/stem extracts of Hyptis capitata with aqueous tetrachloroaurate (AuCl4 -) ions (Revathy et al, 2022). Similarly, Ag-NPs were prepared using 10 mL of the leaf extract with 90 mL of aqueous silver nitrate (AgNO3) solution and subjecting to microwave irradiation (Revathy et al, 2022).…”

Section: Plantsmentioning

confidence: 99%

“…For example synthesis of Au-NPs by using leaves/stem extracts of Hyptis capitata with aqueous tetrachloroaurate (AuCl4 -) ions (Revathy et al, 2022). Similarly, Ag-NPs were prepared using 10 mL of the leaf extract with 90 mL of aqueous silver nitrate (AgNO3) solution and subjecting to microwave irradiation (Revathy et al, 2022). Stable and crystalline Au-NPs (16-40 nm) were synthesized by exposing the aqueous extracts of the leaves of geranium and fruit extracts of amla (Embalica officinalis) with AgNO3 solution (Tu et al, 2022).…”

Section: Plantsmentioning

confidence: 99%

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A Synthesis of Biogenic Nanoparticles (NPs) for the Treatment of Wastewater and Its Application: A Review

Rath,

Bhardwaj,

Yadav

et al. 2023

Preprint

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Nanoscience is a rapidly growing science stream that has been one of the cost-effective and energy-efficient approaches with wide applications. Water pollution is a major issue that is increasing continuously due to anthropogenic activities and several organic and inorganic contaminants. To overcome this issue, nanoparticles (NPs) have been successfully used to treat water. These NPs possess many beneficial applications in many fields like agriculture, cosmetics, photoconductors, environmental biotechnology, glass and alloy production, solar cells, nanomedicine and drug deliveries, biosensors, food industries, etc. The properties comprising high surface area, greater chemical reactivity, and mechanical properties play a vital role in imparting such beneficiary properties. As a result, there has been an increasing demand for the synthesis of NPs. However, excess usage of NPs further creates toxic by-products. Therefore, scientists and researchers are now focussing on the biogenic synthesis of NPs. The biological routes of NP synthesis have been crucial because they are eco-friendly and environmentally safe. This chapter highlights the usage of different approaches and biogenic sources for the production of NPs. It also discusses the recent advancement in the use of biogenic NPs with respect to applications for wastewater treatment.

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Section: Plantsmentioning

confidence: 99%

Section: Plantsmentioning

confidence: 99%

A Synthesis of Biogenic Nanoparticles (NPs) for the Treatment of Wastewater and Its Application: A Review

Rath,

Bhardwaj,

Yadav

et al. 2023

Preprint

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“…42,43 The choice for cAgNPs stems from the fact that the synthesis of cAgNPs does not require strong reducing and capping agents. 44,45 Additionally, plant waste-based synthesis adopted has a range of phytoconstituents that enhance stability, enable monodispersion, and act as reducing as well as capping agents, making the process green and environmentally friendly. The monodispersed NPs have a reduced tendency to agglomerate and can offset the increase in water demand.…”

Section: Introductionmentioning

confidence: 99%

“…The present study attempts to address the critical issues, namely, water demand, dosage, and synthesis method, to enable the widespread application of NPs in the construction industry. The study adopts a green approach toward the development of colloidal nanosilver (cAgNPs) using waste Lablab purpureus (L.) pods. , The choice for cAgNPs stems from the fact that the synthesis of cAgNPs does not require strong reducing and capping agents. , Additionally, plant waste-based synthesis adopted has a range of phytoconstituents that enhance stability, enable monodispersion, and act as reducing as well as capping agents, making the process green and environmentally friendly. The monodispersed NPs have a reduced tendency to agglomerate and can offset the increase in water demand.…”

Section: Introductionmentioning

confidence: 99%

Development of Colloidal Nanosilver as a High-Workability Nanoadditive for Cement Composites: A Mechanistic Approach

Sata,

Suthar,

Mungule

et al. 2024

ACS Sustainable Chem. Eng.

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The adverse effects on flow and higher replacement dosage are key constraints limiting the large-scale application of nanomaterials in concrete. With a view to addressing the above limitation, the present study discusses the development of colloidal nanosilver (cAgNPs). The Lablab purpureus (L.) pod-based green synthesis adopted enriches cAgNPs with phytochemicals, which synergistically improves the flowability of cement concrete. The contact angle and surface tension measurements confirm its flow affinity. The relative improvement in the performance of designed cAgNPs against commercial nanosilica (SiNPs) was assessed in terms of flow and strength measurements in cement paste specimens. In comparison to SiNPs, inclusion of cAgNPs enhances flow by 80%, while it decreases the superplasticizer requirement by 150%. The compressive strength of both is found to be comparable, while the reactivity as confirmed through TGA and FT-IR is found to be dependent on the binder system. The relative improvement in binding ability with inclusion of cAgNPs is confirmed through FE-SEM and EDS analysis. The above performance improvements are obtained for optimal replacement dosages of 1% and 0.5%, respectively, for cement and blended paste, thus enhancing its economic viability. The ability of cAgNPs to enhance flowability through improved consistency and reduced water demand without compromising strength is a critical departure from conventional nanoparticles and can potentially enhance largescale applications in concrete.

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“…Among the metals used by the industry in nanomaterials, silver is known to have a high toxicity toward many microorganisms [4,5] and viruses [2,6,7]. The wide application areas of silver in the industry [8][9][10][11][12][13][14] require deep knowledge of its potential toxicity in every specific case. In general, the toxicity depends on the metal's form, oxidation state, solubility, and concentration [2,4].…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Analysis of the Cytotoxicity of Al2O3-Supported Silver Nanoparticles Prepared by the Plasma Chemical Process Initiated by Pulsed MW Radiation in the Al2O3–Ag Powder Mixtures

Skvortsova,

Akhmadullina,

Vafin

et al. 2024

IJMS

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An original plasma chemical process initiated by microwave discharge in a mixture of metal and dielectric powders was applied to prepare specific materials, which consisted of microsized spherical particles of aluminum oxide covered with silver nanoparticles. The prepared materials are highly uniform in shape, size distribution, and composition. Their cytotoxicity was investigated using the human cell lines MCF7, HEK293T, A549, and VA-13 and the bacterial strains E. coli JW5503 (ΔtolC) and E. coli K12. Their cytotoxicity was found not to exceed the cytotoxicity of the starting materials. Thus, the prepared materials can be considered highly promising for catalysis and biotechnology applications.

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Synthesis and catalytic applications of silver nanoparticles: a sustainable chemical approach using indigenous reducing and capping agents from Hyptis capitata

Abstract: Indigenous chemical compounds found in plants such as phenolics, alkaloids, carotenoids, xanthophylls and terpenoids are used by chemists for a variety of synthetic applications. The Sustainable Chemistry or green chemistry,...

Cited by 6 publications

References 36 publications

A Synthesis of Biogenic Nanoparticles (NPs) for the Treatment of Wastewater and Its Application: A Review

A Synthesis of Biogenic Nanoparticles (NPs) for the Treatment of Wastewater and Its Application: A Review

Development of Colloidal Nanosilver as a High-Workability Nanoadditive for Cement Composites: A Mechanistic Approach

The Synthesis and Analysis of the Cytotoxicity of Al2O3-Supported Silver Nanoparticles Prepared by the Plasma Chemical Process Initiated by Pulsed MW Radiation in the Al2O3–Ag Powder Mixtures

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