Solvothermal hot injection synthesis of core-shell AgNi nanoparticles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00107202" target="_blank" >RIV/00216224:14310/19:00107202 - isvavai.cz</a>

Alternative codes found

RIV/68081723:_____/19:00494202

Result on the web

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.08.082" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2018.08.082</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.08.082" target="_blank" >10.1016/j.jallcom.2018.08.082</a>

Result language

angličtina

Original language name

Solvothermal hot injection synthesis of core-shell AgNi nanoparticles

Original language description

Silver-nickel core-shell nanoparticles (NP) were prepared by solvothermal hot injection synthesis by simultaneous thermolysis/reduction of AgNO3 and Ni(acac)(2) precursors in the hot mixture of octadecene and oleylamine. Oleylamine decreases decomposition temperature of AgNO3 to that of Ni(acac)(2) thus ensuring favorable reaction conditions. The prepared AgNi NPs with different Ag/Ni ratios were completely characterized. Dynamic light scattering (DLS) and small angle X-ray scattering (SAXS) were used for particle size characterization of as-prepared AgNi colloids. There is no dependence of the particle size (13-21 nm by SAXS) on the Ag/Ni stoichiometric ratio, but the ultraviolet-visible spectroscopy (UV-vis) reveals that the intensity of the surface plasmon (SPR) decreases with increasing Ni content. Transmission electron microscopy (TEM) verified the results of DLS and SAXS and showed spherical nanoparticle shape. Distribution of individual elements in the nanoparticles was mapped by high resolution scanning transmission electron microscopy and energy dispersive X-ray spectroscopy (STEM-EDS) and revealed their core-shell structure where an Ag nucleus is covered by a thin amorphous Ni layer. Upon heating to 400 degrees C, Ni crystallization is substantiated by appearance of diffractions in the high-temperature X-ray powder diffractograms (HT-XRD) and of a magnetic moment. Ultimate phase separation was proven by scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDS) in samples heated to 1000 degrees C. The reaction course and nanoparticle formation studied by DLS, UV-vis, and Ag and Ni elemental analyses reveal an initial Ag seed formation with subsequent Ni overlayer deposition after 180 s. (C) 2018 Elsevier B.V. All rights reserved.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Volume of the periodical

770

Issue of the periodical within the volume

JAN

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

377-385

UT code for WoS article

000449486300045

EID of the result in the Scopus database

2-s2.0-85051760988