Agro-industrial waste-mediated synthesis and characterization of gold and silver nanoparticles and their catalytic activity for 4-nitroaniline hydrogenation

Dauthal, Preeti; Mukhopadhyay, Mausumi

doi:10.1007/s11814-014-0277-y

Cited by 31 publications

(13 citation statements)

References 44 publications

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“…All of them were capable of synthesizing the nanoparticles, although the kinetics of nanoparticle formation and the particle size were found to depend on the waste fraction used. Other studies on different wastes, such as citrus peels [13] and grape stalks [14], supported the suitability of agro-industrial wastes for such purposes, but also confirmed the fact that the type of waste plays a key role in determining the properties of the obtained nanoparticles. Overall, the use of agro-industrial wastes for the eco-friendly production of nanoparticles seems to be promising, but the relatively few studies on these materials make it difficult to draw definitive conclusions.…”

Section: Introductionmentioning

confidence: 56%

“…A review of the literature shows that the production of nanoparticles by this approach is easy, fast and cost-effective [23,24]. Recently, agro-industrial wastes have been investigated as potential starting materials for the green synthesis of nanoparticles [12][13][14]25]. However, there are still few reports in the literature that explore their suitability for such applications.…”

Section: Discussionmentioning

confidence: 99%

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Green Synthesis of Silver Nanoparticles Using Bilberry and Red Currant Waste Extracts

et al. 2019

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The production of silver nanoparticles (Ag-NPs) from bilberry waste (BW) and red currant waste (RCW) extracts was studied. Red fruit extracts were obtained by treating BW and RCW with aqueous ethanol (50% v/v) at 40 °C. The formation of nanoparticles was monitored spectrophotometrically by measuring the intensity of the surface plasmon resonance band (SPR) of silver. The effects of temperature (20–60 °C) and pH (8–12) on the reaction kinetics and on the properties of Ag-NPs were investigated. Characterization by XRD and dynamic light scattering (DLS) techniques showed that Ag-NPs were highly crystalline, with a face-centered cubic structure and a hydrodynamic diameter of 25–65 nm. The zeta potential was in the range of −35.6 to −20.5 mV. Nanoparticles obtained from BW were slightly smaller and more stable than those from RCW. A kinetic analysis by the initial-rate method showed that there was an optimum pH, around 11, for the production of Ag-NPs. Overall, the results obtained suggest that BW and RCW can be advantageously used as a source of reducing and stabilizing agents for the green synthesis of Ag-NPs.

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Section: Introductionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Bilberry and Red Currant Waste Extracts

et al. 2019

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“…In 2014, Dauthal and Mukhopadhyay reported the use of Citrus aurantifolia peel extract as a bio-reducing agent for in the biosynthesis of Ag and Au NPs (Scheme 24). [178] Both Ag and Au NPs were spherical with sizes in the ranges of 10-32 and 6-46 nm, respectively, and showed high catalytic activity in the reduction of 4-nitroaniline (4-NA), an anthropogenic pollutant, using NaBH 4 at room temperature. They reported that the citric and ascorbic acids present in the peel extract not only functioned as reeducing agents, but also served as stabilizers in the formation of the Ag and Au NPs.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Nasrollahzadeh

Yek

Motahharifar

et al. 2019

The Chemical Record

147

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Among different metallic nanoparticles, sliver nanoparticles (Ag NPs) are one of the most essential and fascinating nanomaterials. Importantly, among the metal based nanoparticles, Ag NPs play a key role in various fields such as biomedicine, biosensors, catalysis, pharmaceuticals, nanoscience and nanotechnology, particularly in nanomedicine. A main concern about the chemical synthesis of Ag NPs is the production of hazardous chemicals and toxic wastes. To overcome this problem, many research studies have been carried out on the green synthesis of Ag NPs using green sources such as plant extracts, microorganisms and some biopolymers without formation of hazardous wastes. Among green sources, plants could be remarkably valuable to exploring the biosynthesis of Ag NPs. In this review, the green synthesis of Ag‐based nanocatalysts such as Ag NPs, AgPd NPs, Au−Ag NPs, Ag/AgPd NPs, Ag/Cu NPs, Ag@AgCl NPs, Au−Ag@AgCl nanocomposite, Ag−Cr‐AC nanocomposite and Ag NPs immobilized on various supports such as Natrolite zeolite, bone, ZnO, seashell, hazelnut shell, almond shell, SnO2, perlite, ZrO2, TiO2, α‐Al2O3, CeO2, reduced graphene oxide (rGO), h‐Fe2O3@SiO2, and Fe3O4 using numerous plant extracts as reducing and stabilizing agents in the absence of hazardous surfactant and capping agents has been focused. This work describes the state of the art and future challenges in the biosynthesis of Ag‐based nanocatalysts. The fact about the application of living plants in metal nanoparticle (MNPs) industry is that it is a more economical and efficient biosynthesis biosynthetic procedure. In addition, the catalytic activities of the synthesized, Ag‐based recyclable nanocatalysts using various plant extracts in several chemical reactions such as oxidation, reduction, coupling, cycloaddition, cyanation, epoxidation, hydration, degradation and hydrogenation reactions have bben extensively discussed.

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“…The use of biofabricated NPs in this direction could be seen as a prominent alternative for traditionally synthesized polymer supported nanocatalyst (Zayed and Eisa 2014 ; Zayed et al 2015 ), where the structure and functional group of polymer support influences the catalytic behavior of NPs (Liu et al 2007 ). However, in the case of biofabricated NPs, surface biomolecules (functional groups) can act as a polymer support, and influence of external polymer support on catalytic activity of NPs can be minimized (Sharma et al 2007 ; Gangula et al 2011 ; Dauthal and Mukhopadhyay 2012 , 2013b , 2015a , b ). Furthermore, the inert behavior of supported biomass with an added advantage of eco-friendliness makes biofabricated NPs as noble tool for bioremediation.…”

Section: Introductionmentioning

confidence: 99%

Phyto-synthesis and structural characterization of catalytically active gold nanoparticles biosynthesized using Delonix regia leaf extract

Dauthal

Mukhopadhyay

2016

3 Biotech

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Biological methods of nanoparticles synthesis are ecologically sound and sustainable alternative to the conventional methods. On the basis of aforesaid premise, the present study deals with the optimization and fabrication of gold nanoparticles (Au-NPs) using easily available bio-resource, Delonix regia leaf extract. The use of practically nontoxic natural extracts and water allows the synthesis pathways presented to be considered as ‘‘green’’ and so permitting the synthesized Au-NPs to be used in sensitive areas, such as bioremediation. Various characterization techniques are adopted for the evaluation of size, stability, morphology, crystal nature, and purity of nanoparticles. Ultraviolet–visible spectroscopy analysis showed a surface Plasmon resonance peak for prepared Au-NPs at 542 nm, and its absorbance increased with increasing the interaction time. Transmission electron microscopy analysis showed that the particles were spherical and 4–24 nm in size. Energy dispersive X-ray spectroscopy analysis displayed a 2.2 keV peak corresponding to the pure phase gold nanocrystal. X-ray diffraction analysis proved the fabrication of crystalline Au-NPs with face-centered cubic geometry within 10 min. Furthermore, ζ potential (−15 mV) and Fourier transform infrared data suggested the role of polar polyphenolic compounds of leaf extract in fabrication and stabilization process. Biofabricated nanoparticles are demonstrated to have catalytic activity for the reduction of toxic nitro-organic pollutant o-nitroaniline. Therefore, the present study offers a straightforward, cost-efficient, eco-friendly, and sustainable alternative for the fabrication of catalytically active Au-NPs.

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Agro-industrial waste-mediated synthesis and characterization of gold and silver nanoparticles and their catalytic activity for 4-nitroaniline hydrogenation

Cited by 31 publications

References 44 publications

Green Synthesis of Silver Nanoparticles Using Bilberry and Red Currant Waste Extracts

Green Synthesis of Silver Nanoparticles Using Bilberry and Red Currant Waste Extracts

Recent Developments in the Plant‐Mediated Green Synthesis of Ag‐Based Nanoparticles for Environmental and Catalytic Applications

Phyto-synthesis and structural characterization of catalytically active gold nanoparticles biosynthesized using Delonix regia leaf extract

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