Metal Nanoparticles Formation from Nickel Hydroxide

In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initi...

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Bibliographic Details
Published in:Materials 2020-10, Vol.13 (20), p.4689
Main Authors: Sidorova, Elena N., Dzidziguri, Ella L., Vinichenko, Yulia P., Ozherelkov, Dmitriy Yu, Shinkaryov, Alexander S., Gromov, Alexander A., Nalivaiko, Anton Yu
Format: Article
Language:English
Subjects:
Additive manufacturing
Aggregates
Catalysis
Chemical reactions
Decantation
Deposition
Hydroxides
Infrared spectroscopy
Initial conditions
Low temperature
Methods
Morphology
Nanomaterials
Nanoparticles
Nickel
Nickel compounds
Photoelectrons
Precipitates
Radiation
Raman spectroscopy
Ultrasonic imaging
Ultrasonic processing
Washing
X ray photoelectron spectroscopy
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Summary:In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen adsorption, infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy methods were used for nanoparticle characterization. Based on the resulting data, a model of the Ni(OH)2 aggregate structure after deposition was proposed. The number of nickel hydroxide particles required to form one nickel nanoparticle was estimated, and a model of its formation was proposed.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13204689