Please use this identifier to cite or link to this item: http://essuir.sumdu.edu.ua/handle/123456789/37193
Or use following links to share this resource in social networks: Recommend this item
Title Features of Ni / NiO Nanopowder Synthesis by Thermal Decomposition of Nickel Acetate Amines: Effect of Annealing Temperature and Duration and Ammonia Content on Powder Composition and Particle Size
Authors Dulina, I.O.
Lobunets, T.F.
Klochkov, L.O.
Ragulya, A.V.
ORCID
Keywords Nickel ammine complexes
Nanopowders
IR-spectroscopy
XRD analysis
TG
DTA
DTG
Auger analysis
Slit pore structure
Free and fixed carbon concentrations
Type Article
Date of Issue 2014
URI http://essuir.sumdu.edu.ua/handle/123456789/37193
Publisher Sumy State University
License
Citation Proc. NAP 3, 02NNPT02 (2014)
Abstract Ni/NiO nanopowders with different metal and oxide phase ratio have been prepared by using thermal decomposition of nickel acetate ammine complexes which contain various ammonia concentrations at the temperature range 300 – 500 ºC in air. Obtained powders have been characterized by IR-spectroscopy, XRD and TG, DTA, DTG, TEM, laser granulometry, adsorption-structural method and layer-by-layer Auger analysis. Thermal decomposition of nickel ammine complexes occurred with formation of crystalline hydroxide containing and amorphous carbonate containing precursors. Changing of precursors composition with different NH3 content and annealing duration and temperature leads to different pore structure, agglomerate size of powders and determinates free and fixed carbon concentrations. Mean crystallite size of nickel depended on temperature only. In the temperature range from 350 to 500 °С the crystallite size of nickel has grown from 50 to 55 nm. Mean crystallite size of nickel oxide depended on temperature and ammonia content. In the temperature range from 350 to 500 °С the crystallite size of NiO has grown from 5 to 25 nm. Increasing ammonia content from 3.6 to 14.4 mol/mol Ni led to decreasing NiO crystallite size from 8–10 to 5 nm.
Appears in Collections: Наукові видання (ЕлІТ)

Views

Australia Australia
1
Canada Canada
1
China China
1787023906
France France
1
Germany Germany
4993845
India India
1
Ireland Ireland
70091
Italy Italy
2
Japan Japan
1
Lithuania Lithuania
1
Netherlands Netherlands
626
Singapore Singapore
1
Ukraine Ukraine
66022618
United Kingdom United Kingdom
33011935
United States United States
-1997231382
Unknown Country Unknown Country
66022617
Vietnam Vietnam
5007

Downloads

China China
895645914
France France
1
Germany Germany
2
India India
1
Lithuania Lithuania
1
Ukraine Ukraine
198067238
United Kingdom United Kingdom
1
United States United States
1787023906
Unknown Country Unknown Country
22
Vietnam Vietnam
1

Files

File Size Format Downloads
dulina_nanopowders.pdf 535.31 kB Adobe PDF -1414230209

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.