Preparation of metal-polymer nanocomposites by chemical reduction of metal ions: functions of polymer matrices

Джардималиева, Г. И.; Uflyand, Igor Е.

doi:10.1007/s10965-018-1646-8

Cited by 39 publications

(28 citation statements)

References 317 publications

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“…Therefore, substantial efforts have been devoted to control and optimize the properties of these nanomaterials. 5,6 Gold nanoflowers (AuNFs) are unique nanostructures with large numbers of branches. [7][8][9][10] Owning to their coarse surfaces consisting of many sharp tips, as well as high surface-to-volume ratios, 3D hierarchical AuNFs have demonstrated remarkable performances in catalysis, 11,12 surface-enhanced Raman scattering, [13][14][15] photothermal conversion, 16 and cell imaging.…”

mentioning

confidence: 99%

Polymer-grafted gold nanoflowers with temperature-controlled catalytic features by in situ particle growth and polymerization

Chen

Weil

2019

Mater. Chem. Front.

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We report a convenient strategy for the synthesis of polymer-grafted gold nanoflowers by combining an activator regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) and the reduction of metal ions in a one-pot fashion. Poly(N-isopropylacrylamide)-coated gold nanoflowers (PNIPAM-AuNFs) with controllable sizes, shapes, and shell thickness are obtained and applied as temperature-controlled nanoparticle catalysts for the hydrogenation of p-nitrophenol.

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confidence: 99%

Polymer-grafted gold nanoflowers with temperature-controlled catalytic features by in situ particle growth and polymerization

Chen

Weil

2019

Mater. Chem. Front.

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“…Polymeric support materials, such as block copolymers [25], dendrimers [26], latex particles [27], microgels [28,29,30], and other polymers [31,32,33], have been used to load metal nanoparticles. Among these support materials, the synthesis of metal nanoparticles supported on polymer microgels has received much attention, owing to their tunable catalytic properties of these systems [34,35,36,37].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silver Nanoparticles Loaded onto Polymer-Inorganic Composite Materials and Their Regulated Catalytic Activity

et al. 2019

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We present a novel approach for the preparation of polymer-TiO2 composite microgels. These microgels were prepared by the in situ hydrolysis and condensation of titanium tetrabutoxide (TBOT) in a mixed ethanol/acetonitrile solvent system, using poly(styrene-co-N-isopropylacrylamide)/poly(N-isopropylacrylamide-co-methacrylic acid) (P(St-NIPAM/P(NIPAM-co-MAA)) as the core component. Silver nanoparticles (AgNPs) were controllably loaded onto the polymer-TiO2 composite microgels through the reduction of an ammoniacal silver solution in ethanol catalyzed by NaOH. The results showed that the P(St-NIPAM)/P(NIPAM-co-MAA)-TiO2 (polymer-TiO2) organic-inorganic composite microgels were less thermally sensitive than the polymer gels themselves, owing to rigid O–Ti–O chains introduced into the three-dimensional framework of the polymer microgels. The sizes of the AgNPs and their loading amount were controlled by adjusting the initial concentration of [Ag(NH3)2]+. The surface plasmon resonance (SPR) band of the P(St-NIPAM)/P(NIPAM-co-MAA)-TiO2/Ag (polymer-TiO2/Ag) composite microgels can be tuned by changing the temperature of the environment. The catalytic activities of the polymer-TiO2/Ag composite microgels were investigated in the NaBH4 reduction of 4-nitrophenol. It was demonstrated that the organic-inorganic network chains of the polymer microgels not only favor the mass transfer of the reactant but can also modulate the catalytic activities of the AgNPs by tuning the temperature.

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“…Creation of new polyfunctional polymeric materials with multifaceted valuable properties is a hot research topic due to ever-increasing demand for the development of innovation technologies. Among the most prospective classes of polymeric compounds are the polymers containing nitrogen heterocyclic fragments, which ensure a variety of valuable properties such as a high lyophilicity, ability of complex formation and quaternization, chemical and thermal stability, and biocompatibility [1][2][3]. Polymers of such a type are of a particular interest for the development of biologically active and hi-tech materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Silver-Containing Nanocomposites Based on 1-Vinyl-1,2,4-triazole and Acrylonitrile Copolymer

Pozdnyakov

Emel’yanov

Кузнецова

et al. 2019

Journal of Nanomaterials

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Insoluble silver-containing nanocomposites based on 1-vinyl-1,2,4-triazole and acrylonitrile copolymer was synthesized and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, atomic absorption, X-ray diffraction, and thermogravimetric data analysis. The silver content of the nanocomposites varied from 8.0 to 23.5% (the silver content depends on the ratio of the copolymer-silver salt). Synthesis of silver nanocomposites was carried out by thermal treatment of a polymer complex of copolymer-silver salt without the use of an additional reducing agent. X-ray diffraction was used to control the formation of silver nanoparticles at different temperatures (210°С, 220°С, and 250°С). Synthesis of nanocomposites shows a developed porous structure with a channel diameter in most cases of 1-4 microns. The EPR monitoring of the nanoparticle germination and growth reveals that the generation of the nanocomposites proceeds via a stage of complex formation between the polymeric matrix and silver ions. The synthesized nanocomposites possess paramagnetic properties and show a narrow EPR symmetric signal with the concentration of unpaired electrons of 1020 spin/g, a g-factor 2.0050, and signal width 5-6 Gs. Thermal stability of silver-containing nanocomposites is up to 270-320°C.

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Preparation of metal-polymer nanocomposites by chemical reduction of metal ions: functions of polymer matrices

Cited by 39 publications

References 317 publications

Polymer-grafted gold nanoflowers with temperature-controlled catalytic features by in situ particle growth and polymerization

Polymer-grafted gold nanoflowers with temperature-controlled catalytic features by in situ particle growth and polymerization

Synthesis of Silver Nanoparticles Loaded onto Polymer-Inorganic Composite Materials and Their Regulated Catalytic Activity

Synthesis and Characterization of Silver-Containing Nanocomposites Based on 1-Vinyl-1,2,4-triazole and Acrylonitrile Copolymer

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