Novel microwave assisted approach to large scale nickel nanoparticle fabrication

Motuzas, Julius, Drobek, Martin, Diniz da Costa, João C. and Julbe, Anne (2014) Novel microwave assisted approach to large scale nickel nanoparticle fabrication. Chemical Engineering Journal, 240 155-160. doi:10.1016/j.cej.2013.11.032


Author Motuzas, Julius
Drobek, Martin
Diniz da Costa, João C.
Julbe, Anne
Title Novel microwave assisted approach to large scale nickel nanoparticle fabrication
Journal name Chemical Engineering Journal   Check publisher's open access policy
ISSN 1385-8947
1873-3212
Publication date 2014-03-15
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.cej.2013.11.032
Open Access Status Not Open Access
Volume 240
Start page 155
End page 160
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
This work shows a novel environmentally benign microwave (MW) assisted method for the fabrication of Ni0 nanoparticles. The objective was the development of a rapid and self-sustainable solvothermal method, starting from concentrated nickel hydroxide suspensions. Suspensions of nickel hydroxide (Ni(OH)2) in ethylene glycol (EG) were converted to Ni0 nanoparticles at 260°C without the need for any supplementary catalysts. The MW irradiation initiated the dissociation of nickel hydroxide to Ni2+ and mobile OH- ions thus triggering the partial catalytic oxidation of EG. As a consequence, two electrons became available to reduce Ni2+ to metallic Ni0 nanoparticles. This process is self-sustainable as the Ni0 nanoparticles then become the catalytic domains for further oxidation of EG and resulting in a faster kinetics for the complete reduction of nickel hydroxide within 60min. Interestingly, the MW-assisted process was also effective in multiple recycling of EG, forming Ni0 nanoparticles after each reduction cycle. This process dispenses the need for using a high amount of solvents as required in conventional solvothermal methods, and greatly reduces solvent waste generation. In addition, this novel process led to almost 100% conversion of highly concentrated suspensions (1.2M Ni(OH)2) to Ni0 nanoparticles, which is very attractive for a large scale production.
Keyword Catalysis
Concentrated suspensions
Microwaves
Nickel nanoparticles
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID PRC08-2.5-1 MEM-sTiMULHY
Institutional Status UQ
Additional Notes Published online 22 November 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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