Green-synthesized gold nanoparticles from Plumeria alba flower extract to augment catalytic degradation of organic dyes and inhibit bacterial growth

Mata, Rani; Bhaskaran, Aswathy; Rani, Sapna

doi:10.1016/j.partic.2014.12.014

Cited by 161 publications

(52 citation statements)

References 40 publications

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“…It is obvious, therefore, that the binding of particles to the microorganism depends on the surface area available for intraction. In general, small nanoparticles have a larger surface area for intraction with bacteria, as compared to that of bigger particles, due to greater antibacterial activity [35,37,38]. In our results, the Gram-positive bacteria showed the lower zone of inhibition, as compared to Gram-negative bacteria.…”

Section: Antibacterial Activitymentioning

confidence: 52%

Green synthesis of silver nanoparticles using phlomis leaf extract and investigation of their antibacterial activity

et al. 2016

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In recent years, the green synthesis of silver nanoparticles using various plant extracts has attracted great attention. This is because, these methods are simple, inexpensive and, eco-friendly. In this study, it was observed that silver ions were reduced by phlomis leaf extract after 5 min, leading to the formation of crystalline silver nanoparticles. Phlomis species is known as a rich source of flavonoids, phenylpropanoids and other phenolic compounds. The silver nanoparticles produced by the phlomis extract were characterized by different techniques including UV-vis spectrophotometry, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and FT-IR. The SEM and TEM results indicated that AgNPs were predominantly spherical in shape with an average particle size of 25 nm. In addition, the antibacterial activity of biologically synthesized nanopartilcles against Gram-positive (Staphyloccocus aureus and Bacillus cereus) and Gram-negative (Salmonella typhimurium and Escherichia coli) bacteria was proved. This study, therefore, showed that the phlomis leaf extract could be used for the green synthesis of silver nanoparticles with the appropriate antibacterial activity.

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Section: Antibacterial Activitymentioning

confidence: 52%

Green synthesis of silver nanoparticles using phlomis leaf extract and investigation of their antibacterial activity

et al. 2016

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“…The catalytic activity of AuNPs is generally dependent on the availability of active surface area for adsorption as it is a surface phenomenon . An increase in the number of vacant surface active sites and decrease in the size of the metal nanoparticles co‐ordinate to the enhancement of surface catalytic activity . The functional groups (‐OH, ‐C=O, etc.)…”

Section: Resultsmentioning

confidence: 99%

“…[42] An increase in the number of vacant surface active sites and decrease in the size of the metal nanoparticles co-ordinate to the enhancement of surface catalytic activity. [43][44] The functional groups (-OH, -C=O, etc.) of CDs are also on the surface of AuNPs, which facilitates negatively charged borohydride ions (BH 4 À ) and 4-nitrophenolate ions to come closer on the surface of AuNPs.…”

Section: Catalytic Performancementioning

confidence: 99%

Carbon Dots Assisted Synthesis of Gold Nanoparticles and Their Catalytic Activity in 4‐Nitrophenol Reduction

et al. 2019

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A novel biocompatible carbon nanoparticles, i. e., carbon dots (CDs) are prepared from cheap organic precursors and are used to synthesize gold nanoparticles (AuNPs). The formation of CDs are confirmed from their absorption and emission properties. The CDs not only acts as reducing agent but also stabilizes the resulting AuNPs. The high stabilizing effect of CDs can be attributed to their hydrophilic surfaces due to the presence of ‐C=O, ‐OH, etc. functional group as confirmed from FTIR spectral analysis. Basically, two types of AuNPs are observed, one is decahedron type particles and the other one is triangular plates. The size of decahedron type AuNPs are measured to be ∼ 30 nm, whereas those of triangular plates are ∼ 100 nm. These mixture of AuNPs are used to study a model catalytic reaction, i. e., reduction of 4‐nitrophenol by NaBH4 in which the reaction is completed in 5 Mins and the reaction follows the first order kinetics with a first order rate constant of 1.28 min−1. Moreover, the resulting AuNPs can be reused for further reactions and up to 4 cycles it has been observed that the efficiency of conversion remains ∼100% with this AuNPs catalyst. Thus, functional CDs not only catalyse the formation of AuNPs, but also give them enough stability for catalytic applications in many organic transformation reactions.

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“…Gold nanoparticles that have been prepared by using flower extract of Caesalpinia pulcherrima shows antifungal and antibacterial activities [139]. Gold nanoparticle prepared from flower Plumeria alba have been associated with antibacterial activity and degradation of dyes [140].…”

Section: Energy Dispersive Spectroscopy (Eds)mentioning

confidence: 99%

Biogenic Synthesis of Gold Nanoparticles and their Applications: A Review

Kaur¹,

Sharma²

2019

Asian J. Chem.

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The purpose of the present study is to explore the merits and demerits of various biogenic synthesis route of gold nanoparticles using plant materials and microbes. Literature survey indicated that microbe mediated synthesis route is found to be quite effective buttheavailability and feasibility of microbes, enzyme control conditions is of great challenge for the researchers. Among all the available bio-reductants for the synthesis of gold nanoparticles rhizome of Zinger officinale (ginger) has been found more advantageous in accordance with availability, stability, applicability, reaction time, etc. for the fabrication of gold nanoparticles.

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Green-synthesized gold nanoparticles from Plumeria alba flower extract to augment catalytic degradation of organic dyes and inhibit bacterial growth

Cited by 161 publications

References 40 publications

Green synthesis of silver nanoparticles using phlomis leaf extract and investigation of their antibacterial activity

Green synthesis of silver nanoparticles using phlomis leaf extract and investigation of their antibacterial activity

Carbon Dots Assisted Synthesis of Gold Nanoparticles and Their Catalytic Activity in 4‐Nitrophenol Reduction

Biogenic Synthesis of Gold Nanoparticles and their Applications: A Review

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