Silver metal nanoparticles: Facile dendrimer‐assisted size‐controlled synthesis and selective catalytic reduction of chloronitrobenzenes

Sutton, Amy; Franc, Grégory; Kakkar, Ashok

doi:10.1002/pola.23501

Cited by 26 publications

(19 citation statements)

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“…A special interest is devoted to dendrimers bearing terminal OH groups, which were found to display high affinity towards both carbon dioxide (CO 2 ) [9–12] and metals . OH group act as chelating agent for metals through the electron pair of the oxygen atom, and OH‐rich organic architectures should behave as host matrices for high dispersion and stabilization of metal nanoparticles (MNPs) beside their inherent sequestrating dendritic effect OH groups can be scaffolded on anchoring groups provided by (3‐azidopropyl)triethoxysilane (AzPTES).…”

Section: Introductionmentioning

confidence: 99%

Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

et al. 2016

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Sponge-like gluco-and thioglycerol-organo-bentonite hosting Cu 0 and Pd 0 subnanoparticles with high affinity towards hydrogen were synthesized through an unprecedented procedure involving a chemical grafting of (3-azidopropyl)triethoxysilane, followed by Cu-catalyzed azide-alkyne cycloaddition with propargyl glucoside or triallyl propargyl pentaerythritol. Further, thioglycerol groups were attached to the alkene groups by photolysis (TEC reaction). This resulted in a structure swelling, but further Cu 0 or Pd 0 nanoparticle incorporation produced a compaction due to strong O:metal and S:metal interactions that improve metal stabilization and prevent re-aggregation. Such a structure favored hydrogen capture via physical condensation with easy release at nearly ambient temperature at the expense of hydrogen dissolution in the metal bulk. This innovative concept opens new prospects for obtaining low cost clay-based matrices for a truly reversible capture of hydrogen.[a] Dr.

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Section: Introductionmentioning

confidence: 99%

Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

et al. 2016

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“…Structurally pectin is a linear polysaccharide consisting of D-galacturonic acid units joined in chain by means of α-(1-4) glycosidic linkage (Figure 1b) [25,26]. The presence of functional groups such as carboxyl and hydroxyl groups makes pectin an ideal molecule for complexing with various metals [27,28]. The presence of pectin molecules on the surface of the NPs is evident by the FTIR spectrum (Figure 3b).…”

Section: Discussionmentioning

confidence: 99%

Differently Environment Stable Bio-Silver Nanoparticles: Study on Their Optical Enhancing and Antibacterial Properties

et al. 2013

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Generally, limited research is extended in studying stability and applicational properties of silver nanoparticles (Ag NPs) synthesized by adopting ‘green chemistry’ protocol. In this work, we report on the synthesis of stable Ag NPs using plant-derived materials such as leaf extract of Neem (Azadirachta indica) and biopolymer pectin from apple peel. In addition, the applicational properties of Ag NPs such as surface-enhanced Raman scattering (SERS) and antibacterial efficiencies were also investigated. As-synthesized nanoparticles (NPs) were characterized using various instrumentation techniques. Both the plant materials (leaf extract and biopolymer) favored the synthesis of well-defined NPs capped with biomaterials. The NPs were spherical in shape with an average particle size between 14-27 nm. These bio-NPs exhibited colloidal stability in most of the suspended solutions such as water, electrolyte solutions (NaCl; NaNO3), biological solution (bovine serum albumin), and in different pH solutions (pH 7; 9) for a reasonable time period of 120 hrs. Both the bio-NPs were observed to be SERS active through displaying intrinsic SERS signals of the Raman probe molecule (Nile blue A). The NPs were effective against the Escherichia coli bacterium when tested in nutrient broth and agar medium. Scanning and high-resolution transmission electron microscopy (SEM and HRTEM) images confirmed cellular membrane damage of nanoparticle treated E. coli cells. These environmental friendly template Ag NPs can be used as an antimicrobial agent and also for SERS based analytical applications.

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“…Different types of polymer-based agents have been investigated for preparation of metal and non-metal particles [26][27][28][29][30][31]. Metal NPs, semiconductors, inorganic oxides, and quantum dots synthesis were also investigated, especially in the confined space of surfactants, inorganic templates, and polymeric stabilizing agents [32][33][34][35]. The structure of the metal particles can be significantly affected by the preparation technique [36][37][38][39].…”

Section: Nanoparticle Synthesismentioning

confidence: 99%

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

Siegel¹,

Řezníčková²,

Slepička³

et al. 2015

Nanoparticles Technology

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This chapter summarizes the basic information about elementary characteristics and technology of preparation of noble metal nanoparticles. The introduction gives some basic information on the history of development in this area, especially in terms of dimensionality of metal nanostructures and their possible applications.The first subsection is devoted to the preparation and characterization of "u, "g, Pt, and Pd nanoparticles NPs , which were synthesized by direct metal sputtering in liquid propane-, , ,-triole glycerol . This method provides an interesting alternative to time-consuming, wetbased chemical synthesis techniques. Moreover, the suggested technique allows targeted variation of metal nanoparticle size, which is demonstrated in detail in case of "uNPs by variation of capturing media temperature. Nanoparticle size and shape were studied by transmission electron microscopy and dynamic light scattering. Optical properties of nanoparticle solution were determined by measuring its UV-Vis spectra. Concentration of metal nanoparticles in prepared solutions was determined by atomic absorption spectroscopy. "ntibacterial properties were tested against two common pollutants Escherichia coli, a Gram-negative bacteria, and Staphylococcus epidermidis, a Gram-positive bacteria . In the presence of "g nanoparticles, the growth of E. coli and S. epidermidis was completely inhibited after h. "ny growth inhibition of E. coli was observed neither in the presence of smaller -nm, "uNP -nor bigger -nm, "uNP -"uNPs during the whole examination period. "uNP -, but not "uNP -, was able to inhibit the growth of. S epidermidis. We also observed significant difference in biological activities of Pt and PdNPs. More specifically, PdNPs exhibited considerable inhibitory potential against both E. coli and S. epidermidis, which was in contrast to ineffective PtNPs. Our results indicate that "g, Pd, and partially "uNPs have high potential to combat both Gram-positive and Gram-negative bacterial strains.The second subsection describes the effort to anchor metal nanoparticles onto polyethyleneterephthalate PET carrier. Two different procedures of grafting of polymeric carrier, activated by plasma treatment, with "u and "gNPs are described. In the first procedure, the PET foil was grafted with biphenyl-, -dithiol "PD and subsequently with "u and "gNPs. In the second one, the PET foil was grafted with "u and "gNPs previously coated by the same "PD. X-ray photoelectron spectrosco-© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.py, Fourier transform infrared spectroscopy, and electrokinetic analysis were used for characterization of the polymer surface at different modification steps. "u and "gNPs were characterized by UV-Vis spectroscopy. In case of both types of nanoparticles, the first ...

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Silver metal nanoparticles: Facile dendrimer‐assisted size‐controlled synthesis and selective catalytic reduction of chloronitrobenzenes

Cited by 26 publications

References 61 publications

Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

Differently Environment Stable Bio-Silver Nanoparticles: Study on Their Optical Enhancing and Antibacterial Properties

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

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Silver metal nanoparticles: Facile dendrimer‐assisted size‐controlled synthesis and selective catalytic reduction of chloronitrobenzenes

Cited by 26 publications

References 61 publications

Cu0and Pd0loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

Cu0and Pd0loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

Differently Environment Stable Bio-Silver Nanoparticles: Study on Their Optical Enhancing and Antibacterial Properties

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

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Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions

Cu⁰and Pd⁰loaded Organo-Bentonites as Sponge-like Matrices for Hydrogen Reversible Capture at Ambient Conditions