Green synthesis of gold nanoparticles using Gracilaria crassa leaf extract and their ecotoxicological potential: Issues to be considered

Kamaraj, Chinnaperumal; Karthi, Sengodan; Reegan, Appadurai Daniel; Balasubramani, Govindasamy; Ramkumar, Govindaraju; Kalaivani, Kandaswamy; Zahir, Abdul Abduz; Deepak, Paramasivam; Senthil‐Nathan, Sengottayan; Rahman, Md. Mostafizur; Islam, Abu Reza Md. Towfiqul; Malafaia, Guilherme

doi:10.1016/j.envres.2022.113711

Cited by 52 publications

(22 citation statements)

References 75 publications

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“…The peak appearing at 1637.26 cm −1 corresponds to CO stretching of carbonyl group that become manifest in this range 34 . The shifting and loss of peaks from AuNPs relative to those from H. macroloba extract prove the presence of a reaction between the H. macroloba and HM‐AuNPs 35 …”

Section: Resultsmentioning

confidence: 90%

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Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange

Lavanya,

Anandaraj,

Selvam

et al. 2024

Polymers for Advanced Techs

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Green synthesis of gold nanoparticles (AuNPs) is gaining attention of researchers because of their varieties of biomedical and environmental applications. This study reported the novel eco‐friendly synthesis of AuNPs using green macroalgae Halimeda macroloba (HM) extract and evaluate their photocatalytic potential. The green synthesized H. macroloba mediated gold nanoparticles (HM‐AuNPs) was characterized using UV–visible spectrophotometry, Fourier‐transform infrared (FT‐IR) spectroscopy, transmission electron microscope (TEM), scanning electron microscope‐energy dispersive spectroscopy, x‐ray photoelectron spectroscopy (XPS), and particle size distribution (PSD) anlaysis. The UV–visible spectrum shows a sharp intense plasmonic resonance peak at 543 nm. The bioactive compounds present in HM were primarily responsible for the biological reduction of gold ions validated by FT‐IR analysis. XRD analysis proved the crystalline face centered cubic structure of the HM‐AuNPs. The average particle size of 18.72 nm and morphological evidences were obtained from the images from TEM. The metallic form of biosynthesised HM‐AuNPs was confirmed by XPS results with a distinctive binding energy. The photocatalytic degradation ability of the green synthesized HM‐AuNPs was investigated against the methylene blue (MB) and methylene orange (MO) dyes under sunlight irradiation. The HM‐AuNPs exhibited 97.23% and 89.91% photocatalytic activity against MB and MO after 90 min of exposure to sunlight, respectively. The overall results of this research indicate that H. macroloba mediated HM‐AuNPs can be used as an effective option for the degradation of industrial dyes.

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Section: Resultsmentioning

confidence: 90%

“…34 The shifting and loss of peaks from AuNPs relative to those from H. macroloba extract prove the presence of a reaction between the H. macroloba and HM-AuNPs. 35 F I G U R E 4 (A) X-ray diffraction pattern and (B) x-ray photoelectron spectroscopy spectrum of Halimeda macroloba mediated gold nanoparticles.…”

Section: Fourier Transform Infrared Spectral Analysismentioning

confidence: 99%

Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange

Lavanya,

Anandaraj,

Selvam

et al. 2024

Polymers for Advanced Techs

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“…However, their toxicity toward aquatic biota has to be evaluated. 191 Moreover, metal-based NPs have been reported to cause more toxic effects on living organisms compared with their bulk forms. 4,18 Table 4 summarizes some in vivo and in vitro toxicity evaluations of NPs in different fish species.…”

Section: Potential Risks Of Inorganic Nanoparticles In Aquaculturementioning

confidence: 99%

“…Green NPs appear as convenient route to the production of eco‐friendly and cost effective NPs. However, their toxicity toward aquatic biota has to be evaluated 191 . Moreover, metal‐based NPs have been reported to cause more toxic effects on living organisms compared with their bulk forms 4,18 .…”

Section: Potential Risks Of Inorganic Nanoparticles In Aquaculturementioning

confidence: 99%

Inorganic nanoparticles for use in aquaculture

Vijayaram

Τσίγκου

Zuorro

et al. 2023

Reviews in Aquaculture

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Nanotechnology is a rising technology dealing with nanoparticle‐based (1–100 nm) organic and inorganic materials. Such technology has a vital role in various industrial sectors, including pharmaceuticals, nuclear energy, fuel and energy, electronics, and bioengineering, while having potential applications to human, animal, plant, and environmental health. Even though nanomaterial applications can cover multi‐areas of biological and natural fields, limited information are available in the aquaculture sector. Nowadays, the aquaculture sector is the most imperative field to meet animal protein requirements for human nutrition, and aquaculture disease outbreaks as well as the aquatic environment pollutants are significant hindrances in producing healthy aquatic products. The current review aims to enlighten the direction of nanotechnology in the aquaculture industry while providing more specific information about inorganic forms of nanoparticles used to develop several types of applications such as antimicrobial, antibiofilm and photocatalytic agents, as well as aquatic animal nutrition in the domain of aquaculture. A large number of inorganic nanoparticles and their use as animal feed and for water treatment are extensively described. Their potential risks in aquaculture are also presented and discussed. The aquaculture nanotechnology applications are expected to contribute to fish health improvement, harmful microbes control, and aquatic products nano‐delivery in the forthcoming years.

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“…This is the main mechanism behind AgNPs synthesis. Such AgNPs have efficient antibacterial activity against several bacterial strains [9].…”

Section: Introductionmentioning

confidence: 99%

Grewia tenax bark extract mediated silver nanoparticles as an antibacterial, antibiofilm and antifungal agent

Yadav,

Jain,

Nimesh

et al. 2024

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Grewia tenax plant possesses many medicinal qualities that can be harnessed for bio-applications via nanotechnology in a cost-effective and environment-friendly manner. The synthesised silver nanoparticles (GTB-AgNPs) from Grewia tenax bark extract were first detected by observing the change in colour from yellowish brown to dark brown and confirmed by UV–vis spectroscopy. UV–vis spectral analysis recorded the surface plasmon resonance at 420 nm. In the current research, several process parameters (time, temperature, concentration of AgNO3 and the ratio of extract to AgNO3) were adjusted by using one variable at a time (OVAT) approach. Spectroscopy accompanied by dynamic light scattering (DLS), x-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy dispersive x-ray (EDX) determines the size, nature, morphological variations and chemical constituents of GTB-AgNPs. The size range was found within 35−45 nm and the image clearly showed that the GTB-AgNPs were spherical in shape and well dispersed in nature. Zeta potential and Fourier-transform infrared spectroscopy (FTIR) were done to analyse GTB-AgNPs stability, dispersion and the biomolecules in aqueous bark extract liable for the bioreduction of silver particles. These GTB-AgNPs showed excellent antibacterial action against Gram-positive (S. aureus and B. subtilis) and Gram-negative bacteria (P. aeruginosa and E. coli) which was observed by disc diffusion assay. Congo red agar plate (CRA) assay effectively unveiled the antibiofilm proficiency of the particles. These studies displayed a reduction in bacterial sustainability and the formation of exopolysaccharides. Disc diffusion assay confirmed the antifungal competency against A. niger and C. albicans. SEM was performed to elucidate the intracellular breakage and morphological transformations in cells of Gram-positive bacteria and fungi after treatment with GTB-AgNPs. The current study, therefore, enlightened applications of GTB-AgNPs as an efficient antimicrobial agent and applicable substitute in the pharmaceutical area.

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Green synthesis of gold nanoparticles using Gracilaria crassa leaf extract and their ecotoxicological potential: Issues to be considered

Cited by 52 publications

References 75 publications

Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange

Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange

Inorganic nanoparticles for use in aquaculture

Grewia tenax bark extract mediated silver nanoparticles as an antibacterial, antibiofilm and antifungal agent

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