2015
Solvothermal hot injection AgNi nanoalloy preparation
VYKOUKAL, Vít, Jiří PINKAS, Jiří BURŠÍK a Pavla ROUPCOVÁZákladní údaje
Originální název
Solvothermal hot injection AgNi nanoalloy preparation
Název česky
Solvotermální příprava nanoslitiny AgNi metodou horkého vstřikování
Autoři
VYKOUKAL, Vít, Jiří PINKAS, Jiří BURŠÍK a Pavla ROUPCOVÁ
Vydání
French-Czech “Vltava” Chemistry Meetings, 2015
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10402 Inorganic and nuclear chemistry
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova česky
nanočástice; slitina; stříbro; nikl; DLS; SAXS; TEM;
Klíčová slova anglicky
nanoparticles; alloy; silver; nickel; DLS; SAXS; TEM;
Změněno: 18. 3. 2016 17:52, prof. RNDr. Jiří Pinkas, Ph.D.
Anotace
V originále
Chemical synthesis of nanomaterials is a very progressive field of study. Preparation of nanoalloys is a challenging task due to their chemical, phase, and morphological variability. Nanoparticles of metal alloys exhibit many interesting properties, such as depression of melting point,1,2,3 plasmon resonance4,5, magnetism, and catalytic activity. For nanoalloys preparation, the solvothermal synthesis, specifically in oleylamine is highly advantageous.6,7 Hot injection technique should ensure homogeneous conditions for nanoparticles nucleation and growth. AgNi nanoparticles were prepared by injection of an oleylamine solution (4 cm3) of AgNO3 and Ni(acac)2 (different ratios, 4 mmol total amount) to a mixture of oleylamine (16 cm3) and octadecene (20 cm3) at 230 °C. After 10 minutes, the reaction mixture was cooled down to room temperature in a water bath. Then 20 cm3of acetone was added and the mixture was centrifuged. Acetone was added to increase the yield. The precipitate was washed by a mixture of hexane and acetone (1:3 volume ratio). This procedure was repeated twice and finally the precipitate was dispersed in hexane and characterized. Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), and Small-Angle X-ray Scattering (SAXS) analyses were carried out for determination of average size, size distribution, and shape of prepared nanoparticles. Obtained results were mutually compared. Thermal behavior was characterized by Differential Scanning Calorimetry (DSC). Plasmon resonances were observed and we found out that the intensity of plasmon resonance was dependent on the molar ratio of AgNi in the particles.
Návaznosti
| ED1.1.00/02.0068, projekt VaV |
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| GA14-12653S, projekt VaV |
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| LD11046, projekt VaV |
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