Evaluation of the kinetic and catalytic properties of biogenically synthesized silver nanoparticles

Choudhary, Manoj K.; Kataria, Jyoti; Sharma, Shweta

doi:10.1016/j.jclepro.2018.09.015

Cited by 61 publications

(31 citation statements)

References 41 publications

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“…The reaction demonstrated that the seed particles were formed within the first 10 min of the reaction (nucleation phase), followed by a rapid growth phase to reach the stabilization phase within 30 min. The reaction rate of RB extract for AgNP synthesis was determined by plotting ln ½a/ð1 − aÞ versus time (where a = ½AðtÞ/Að∞Þ; AðtÞ and Að∞Þ are the absorbance at time t and ∞, respectively) [43,44]. The rate constant (k obs ) of the reaction was 0.210 min -1 (inset in Figure 2(c)).…”

Section: Resultsmentioning

confidence: 99%

Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

Jiamboonsri

Wanwong

2021

Journal of Nanomaterials

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The green synthesis of silver nanoparticles (AgNPs) has been attractive in biomedical applications due to its nontoxic and eco-friendly approach. This study presents the facile, rapid, and cost-effective synthesis of AgNPs by photoassisted chemical reduction using Riceberry (RB) rice extract as a reducing agent. The effects of reaction parameters including photoirradiation, irradiation time, the volume ratio of silver nitrate (AgNO3) to RB extract, and pH condition on the AgNP formation were also investigated. The characterization of AgNPs was determined by UV–visible spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared (FT-IR) spectroscopy. For antibacterial application, the synthesized AgNPs were studied by disc diffusion method against Escherichia coli and Staphylococcus aureus. The results indicated that light irradiation was an important factor to accelerate the formation of AgNPs. The synthesis parameters including volume of RB extract and pH condition significantly affected the particle size and crystallinity of AgNPs. The volume ratio of AgNO3 to RB extract 1 : 12.5 at pH 2.5 under photoirradiation was the successful condition to form nanometer-sized crystalline particles (average particle size of 59.48 ± 0.37 nm ) within 30 min with a rate constant of 0.210 min–1. The FT-IR measurement also suggested that the phytochemical constituents in RB extract were served as reducing and stabilizing agents for the synthesis of AgNPs. Additionally, the obtained AgNPs from various conditions demonstrated the antibacterial activity against both strains. Therefore, this study proposes an effective integration technique to synthesize AgNPs within a short time for antibacterial application.

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Section: Resultsmentioning

confidence: 99%

Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

Jiamboonsri

Wanwong

2021

Journal of Nanomaterials

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“…23 These dihydroxy compounds exhibit antioxidant potential; 24 they synergistically donate electrons to Ag + ions adsorbed onto the ZnO nanostructures and reduce them to Ag 0 and are concomitantly oxidized to corresponding quinones. 25,26 This BDP approach for the preparation of noble metal-metal oxide binary heterojunctions does not involve the use of any toxic chemicals or high energy input. Moreover, the entire process occurs smoothly in an aqueous solvent at room temperature; thus, it is a costeffective and green method for nanomaterial fabrication.…”

Section: Biogenic Preparation and Characterization Of Ag-zno Heterojumentioning

confidence: 99%

Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

et al. 2019

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“…Singh et al [27] synthesized silver nanoparticles using Tinospora cordifolia and form absorption band at 420-425 nm. Additionally, green synthesis of silver nanoparticles was reported by Yan-yu et al [42] using Ginkgo biloba, Gopinath et al [28] using Tribulus terrestris fruit, Choudhary et al [43] and Khalil et al [31] using olive leaves, obtained silver nanoparticles with SPR band at 450 nm, 435 nm, and 440-458 nm, respectively. These results are supported further by TEM analysis.…”

Section: Uv-vis Spectroscopy Analysismentioning

confidence: 97%

The effect of monoethanolamine as stabilizing agent in Uncaria gambir Roxb. mediated synthesis of silver nanoparticles and its antibacterial activity

Labanni

Zulhadjri

Handayani

et al. 2019

Journal of Dispersion Science and Technology

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The development of an economic and eco-friendly approach of silver nanoparticles synthesis is an important issue due to its wide application, especially in biomedical applications. In present study, an eco-friendly method and size controlling is developed to synthesize silver nanoparticles using Uncaria gambir Roxb. and monoethanolamine (MEA) as bioreducing agent and stabilizing agent, respectively. The green synthesized silver nanoparticles are characterized using UV-Vis spectroscopy, X-ray diffraction (XRD), and transmission electron microscope (TEM). The silver nanoparticles are formed due to reducing of silver ion by catechin in Uncaria gambir Roxb. leaf extract which is visually recognized from the color change from pale yellow to grayish brown. The formation of silver nanoparticles is confirmed by UV-Vis spectroscopy analysis which provides SPR band range of 405-416 nm. The TEM analysis shows that spherical nanoparticles are formed with size range between 6-39 nm. The using of MEA with molar ratio to Ag þ 10/1 can maintain stability and reduce the particle size up to 40%. The result of XRD analysis shows 4 peaks referring to well-crystallized face-centred cubic silver nanoparticles. The prepared silver nanoparticle has exhibited good stability for more than 6 months. The synthesized silver nanoparticles exhibited good antibacterial activity against Staphylococcus aureus and Escherichia coli strain with a diameter of inhibition zone up to 36 mm. The synthesized silver nanoparticles also showed better activity against Escherichia coli than that of Staphylococcus aureus. These results show a good potential of Uncaria gambir Roxb. mediated silver nanoparticles to be developed in biomedical application.

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Evaluation of the kinetic and catalytic properties of biogenically synthesized silver nanoparticles

Cited by 61 publications

References 41 publications

Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

Photoassisted Synthesis of Silver Nanoparticles Using Riceberry Rice Extract and Their Antibacterial Application

Green biomimetic preparation of efficient Ag–ZnO heterojunctions with excellent photocatalytic performance under solar light irradiation: a novel biogenic-deposition-precipitation approach

The effect of monoethanolamine as stabilizing agent in Uncaria gambir Roxb. mediated synthesis of silver nanoparticles and its antibacterial activity

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