a 2015

Solvothermal hot injection AgNi nanoalloy preparation

VYKOUKAL, Vít, Jiří PINKAS, Jiří BURŠÍK and Pavla ROUPCOVÁ

Basic information

Original name

Solvothermal hot injection AgNi nanoalloy preparation

Name in Czech

Solvotermální příprava nanoslitiny AgNi metodou horkého vstřikování

Authors

VYKOUKAL, Vít, Jiří PINKAS, Jiří BURŠÍK and Pavla ROUPCOVÁ

Edition

French-Czech “Vltava” Chemistry Meetings, 2015

Other information

Language

English

Type of outcome

Konferenční abstrakt

Field of Study

10402 Inorganic and nuclear chemistry

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Faculty of Science

Keywords (in Czech)

nanočástice; slitina; stříbro; nikl; DLS; SAXS; TEM;

Keywords in English

nanoparticles; alloy; silver; nickel; DLS; SAXS; TEM;
Změněno: 18/3/2016 17:52, prof. RNDr. Jiří Pinkas, Ph.D.

Abstract

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.

Links

ED1.1.00/02.0068, research and development project
Name: CEITEC - central european institute of technology
GA14-12653S, research and development project
Name: Stabilita a fázové rovnováhy binárních nanočástic kovů (Acronym: Bimetal_nano)
Investor: Czech Science Foundation
LD11046, research and development project
Name: Fázové diagramy nanoslitin, jejich výpočty a ověření. (Acronym: PHADINANOAL)
Investor: Ministry of Education, Youth and Sports of the CR

Files attached

Vltava2015_abstract_Vykoukal.pdf
Request the author's version of the file