Green synthesized gold nanoparticles with enhanced photocatalytic activity

Singh, Teekam; Jayaprakash, Athira; Alsuwaidi, Mohammad; Madhavan, Asha Anish

doi:10.1016/j.matpr.2020.12.531

Cited by 15 publications

(8 citation statements)

References 21 publications

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“…Similar behaviour was also observed for green tea leaves extract derived gold nanoparticles earlier. 61 There, the photoreduction of methylene blue by green gold nanoparticles was found to be higher than the case where no nanoparticles was present. The time taken for methylene blue (5 × 10 −5 M) degradation by the green gold nanoparticles was recorded to be 3 min.…”

Section: Resultsmentioning

confidence: 95%

Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities

Boruah

Devi

Hazarika³

et al. 2021

RSC Adv.

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Section: Resultsmentioning

confidence: 95%

Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities

Boruah

Devi

Hazarika³

et al. 2021

RSC Adv.

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“…When a 2:1 ratio of extract/salt was used, the band of the greatest intensity, centered at 534 nm, was observed. The shift towards smaller wavelengths indicates a decrease in average particle size, which is due to the increase in the reducing and stabilizing agents available in the extract [37,38]. Finally, the spectrum corresponding to a 3:1 volumetric ratio showed an absorption band at the same wavelength as the previous sample.…”

Section: Resultsmentioning

confidence: 85%

Green Synthesis of Homogeneous Gold Nanoparticles Using Sargassum spp. Extracts and Their Enhanced Catalytic Activity for Organic Dyes

López-Miranda

Molina

Esparza

et al. 2021

Toxics

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Sargassum species-based extracts were used to carry out the synthesis of homogeneous gold nanoparticles. Various techniques were used to determine the characteristics and composition of the nanoparticles. The UV-Vis results showed that the 50% water/ethanol extract had the most reducing agents and stabilizers. Therefore, this type of extract was used to synthesize nanoparticles and for their subsequent characterization. Crystallinity and crystal size were evaluated using X-ray diffraction. Size and morphology were analyzed using scanning electron microscopy, showing that the gold nanoparticles were mostly spherical, with a size range of 15–30 nm. The catalytic activity of the gold nanoparticles was evaluated through the degradation of organic dyes: methylene blue, methyl orange, and methyl red. The degradation rates were different, depending on the nature of each dye, the simplest to degrade was methylene blue and methyl red was the most difficult to degrade. The results indicated that the use of Sargassum spp. for the synthesis of gold nanoparticles has potential in the remediation of water that is contaminated with organic dyes. Moreover, given the recent serious environmental and economic problems caused by the overpopulation of Sargassum spp. in the Mexican Caribbean, the findings hold promise for their practical and sustainable use in the synthesis of nanomaterials.

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“…Au NPs were developed by green synthesis using green tea leaf extract as a reducing and stabilizing agent (Singh et al, 2021). These Au NPs were studied to understand their catalytic role in the photocatalytic degradation of MB under daylight conditions.…”

Section: Some Case Studies Of Photocatalytic Activity Of Green Synthe...mentioning

confidence: 99%

Photocatalytic Activity Induced by Metal Nanoparticles Synthesized by Sustainable Approaches: A Comprehensive Review

et al. 2022

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Nanotechnology is a fast-expanding area with a wide range of applications in science, engineering, health, pharmacy, and other fields. Among many techniques that are employed toward the production of nanoparticles, synthesis using green technologies is the simplest and environment friendly. Nanoparticles produced from plant extracts have become a very popular subject of study in recent decades due to their diverse advantages such as low-cost synthesis, product stability, and ecofriendly protocols. These merits have prompted the development of nanoparticles from a variety of sources, including bacteria, fungi, algae, proteins, enzymes, etc., allowing for large-scale production with minimal contamination. However, nanoparticles obtained from plant extracts and phytochemicals exhibit greater reduction and stabilization and hence have proven the diversity of properties, like catalyst/photocatalyst, magnetic, antibacterial, cytotoxicity, circulating tumor deoxy ribo nucleic acid (CT-DNA) binding, gas sensing, etc. In the current scenario, nanoparticles can also play a critical role in cleaning wastewater and making it viable for a variety of operations. Nano-sized photocatalysts have a great scope toward the removal of large pollutants like organic dyes, heavy metals, and pesticides in an eco-friendly and sustainable manner from industrial effluents. Thus, in this review article, we discuss the synthesis of several metal nanoparticles using diverse plant extracts, as well as their characterization via techniques like UV–vis (ultraviolet–visible), XRD (X-ray diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), FTIR (Fourier transform infrared spectroscopy), etc., and catalytic activity on various hazardous systems.

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Green synthesized gold nanoparticles with enhanced photocatalytic activity

Cited by 15 publications

References 21 publications

Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities

Green synthesis of gold nanoparticles using an antiepileptic plant extract: in vitro biological and photo-catalytic activities

Green Synthesis of Homogeneous Gold Nanoparticles Using Sargassum spp. Extracts and Their Enhanced Catalytic Activity for Organic Dyes

Photocatalytic Activity Induced by Metal Nanoparticles Synthesized by Sustainable Approaches: A Comprehensive Review

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