Plant-mediated biosynthesis of metallic nanoparticles: A review of literature, factors affecting synthesis, characterization techniques and applications

Vijayaraghavan, K.; Thirunavukkarasu, Arunachalam

doi:10.1016/j.jece.2017.09.026

Cited by 302 publications

(144 citation statements)

References 194 publications

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“…A few small peaks (3791, 3745 and 3664 cm −1 ) in P. speciosa shift to sharp peak (3326 cm −1 ) of AgNPs is attributed to the –OH stretching vibration ,. A broad peak of P. speciosa (2104 cm −1 ) shifts to 2196 cm −1 is assigns to C. C. Other peaks of P. speciosa (1696 and 1583 cm −1 ) shift to sharp peak (1638 cm −1 ) is refers to C.O, ( Figure a ). The shifting of several functional groups peaks confirms the existence of phenolic, terpenoid and flavonoid which involves in the synthesis and capping on AgNPs similar with prior study …”

Section: Figuresupporting

confidence: 86%

“…FTIR spectroscopy was used to detect the chemical interaction between P. speciosa and AgNO 3 occurs during synthesis of AgNPs. A few small peaks (3791, 3745 and 3664 cm −1 ) in P. speciosa shift to sharp peak (3326 cm −1 ) of AgNPs is attributed to the –OH stretching vibration ,. A broad peak of P. speciosa (2104 cm −1 ) shifts to 2196 cm −1 is assigns to C. C. Other peaks of P. speciosa (1696 and 1583 cm −1 ) shift to sharp peak (1638 cm −1 ) is refers to C.O, ( Figure a ).…”

Section: Figurementioning

confidence: 95%

“…However, it has limitation for certain application, besides easily being inactivated by complexation and precipitation. Therefore, AgNPs are considered as significant alternative for substitution by combining AgNO 3 with selected plants‐based reducing agent according to following reaction Equation (1) :

…”

Section: Figurementioning

confidence: 99%

“…Several factors such as pH, temperature, reaction time and dosage of plant extracts were found to influence the synthesis of AgNPs such as small size, highly crystalline, high surface area and good optical properties . Therefore, centrifugation has been adapted as one of the significant approaches to solve this problem.…”

Section: Figurementioning

confidence: 99%

“…The changes of solution colour from yellowish to brownish indicated the reaction was occurred through the oxidation of P. speciosa into terpenoids and other oxido‐reductively labile metabolites (act as reducing agents and reduced Ag + ions to Ag 0 ) ,. The strong absorption peak (465 nm) is in a range of visible region of noble AgNPs showed the potential of AgNPs as photocatalytic materials since the range of visible light is 390–700 nm ( Figure c ). This peak was exhibited due to the surface plasmon resonance (SPR) phenomenon originates from the resonant collective conduction electrons oscillations in metallic nanoparticles, along the transversal direction of the electromagnetic field .…”

Section: Figurementioning

confidence: 99%

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Parkia speciosa as Reduction Agent in Green Synthesis Silver Nanoparticles

et al. 2018

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Synthesis of nanoparticles based on plant extract as reduction agent has been discovered extensively due to its environmental friendly approach. In this work, a facile silver nanoparticles is synthesized via incorporation of silver nitrate aqueous solution with Parkia speciosa leaves extract. Centrifugation is introduces to improve the characteristics of nanoparticles. Chemical interactions have identified –OH stretching vibration, C=O and C=C, proving the presence of phenolic, terpenoid and flavonoid capped on silver nanoparticles. The TEM result demonstrates the silver nanoparticles had consistence spherical nanoparticles shape with average particles size (59.96 nm) in accordance with FESEM analysis. The structural analysis by XRD shows the nanoparticles had high degree of crystallinity (97%) and crystallite size (17.95 nm). The optical analysis by UV‐Vis reveals that the nanoparticle produces brown colour solution with high absorption band (465 nm). This proves that Parkia speciosa extract has potential as reduction agent in synthesis of silver nanoparticles.

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Section: Figuresupporting

confidence: 86%

Section: Figurementioning

confidence: 95%

…”

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Parkia speciosa as Reduction Agent in Green Synthesis Silver Nanoparticles

et al. 2018

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Synthesis and Processing of Nanomaterials Mediated by Living Organisms

et al. 2021

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Nanomaterials offer exciting properties and functionalities. However, their production and processing frequently involve complex methods, cumbersome equipment, harsh conditions, and hazardous media. The capability of organisms to accomplish this using mild conditions offers a sustainable, biocompatible, and environmentally friendly alternative. Different nanomaterials such as metal nanoparticles, quantum dots, silica nanostructures, and nanocellulose are being synthesized increasingly through living entities. In addition, the bionanofabrication potential enables also the in situ processing of nanomaterials inside biomatrices with unprecedented outcomes. In this Minireview we present a critical state‐of‐the‐art vision of current nanofabrication approaches mediated by living entities (ranging from unicellular to higher organisms), in order to expand this knowledge and scrutinize future prospects. An efficient interfacial interaction at the nanoscale by green means is within reach through this approach.

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