Ceramic metal oxides with Ni2+ active phase for the fast degradation of Orange II dye under dark ambiance

Chen, Huihuang, Motuzas, Julius, Martens, Wayde and da Costa, Joao C. Diniz (2018) Ceramic metal oxides with Ni2+ active phase for the fast degradation of Orange II dye under dark ambiance. Ceramics International, 44 6: 6634-6640. doi:10.1016/j.ceramint.2018.01.071

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads

Author Chen, Huihuang
Motuzas, Julius
Martens, Wayde
da Costa, Joao C. Diniz
Title Ceramic metal oxides with Ni2+ active phase for the fast degradation of Orange II dye under dark ambiance
Formatted title
Ceramic metal oxides with Ni2+ active phase for the fast degradation of Orange II dye under dark ambiance
Journal name Ceramics International   Check publisher's open access policy
ISSN 0272-8842
1873-3956
Publication date 2018-04-15
Year available 2018
Sub-type Article (original research)
DOI 10.1016/j.ceramint.2018.01.071
Open Access Status File (Author Post-print)
Volume 44
Issue 6
Start page 6634
End page 6640
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
Ceramic metal oxides based on calcium strontium nickel (CSN) were synthesized via a combined EDTA-citric acid complexation method and evaluated using Orange II (OII) as the model pollutant under dark conditions, without adding any extemal stimulants. The CSN catalyst was characterized by a very fast reaction reaching 97% OII degradation within 5 min. The surface of CSN metal oxides proved to be very active toward the breakdown of the -N=N- azo bond of OII. A second electron generating pathway was found as Ni2+ phase in the CSN catalyst oxidized to Ni3+ for the spent catalyst. Both electron generating pathways resulted in the formation of hydroxyl radicals (OH.) as determined using radical quenchers. Hydroxyl radicals were responsible for the formation of several intermediate products. The Ni2+ phase was very active contrary to the Ni3+ phase which could not degrade OII. The fast degradation kinetics of OII using CSN in dark at room temperature was attributed to the double electron generation pathways.
Keyword Ceramics
Ni2+ phase
OII degradation
Dark condition
Fast reaction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 1 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sat, 07 Apr 2018, 20:01:35 EST