Tailoring the oxidation state of cobalt through halide functionality in sol-gel silica

Olguin, Gianni, Yacou, Christelle, Smart, Simon and Diniz da Costa, João C. (2013) Tailoring the oxidation state of cobalt through halide functionality in sol-gel silica. Scientific Reports, 3 2449.1-2449.5. doi:10.1038/srep02449

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Author Olguin, Gianni
Yacou, Christelle
Smart, Simon
Diniz da Costa, João C.
Title Tailoring the oxidation state of cobalt through halide functionality in sol-gel silica
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2013-08-15
Sub-type Article (original research)
DOI 10.1038/srep02449
Open Access Status DOI
Volume 3
Start page 2449.1
End page 2449.5
Total pages 5
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2014
Language eng
Formatted abstract
The functionality or oxidation state of cobalt within a silica matrix can be tailored through the use of cationic surfactants and their halide counter ions during the sol-gel synthesis. Simply by adding surfactant we could significantly increase the amount of cobalt existing as Co3O4 within the silica from 44% to 77%, without varying the cobalt precursor concentration. However, once the surfactant to cobalt ratio exceeded 1, further addition resulted in an inhibitory mechanism whereby the altered pyrolysis of the surfactant decreased Co3O4 production. These findings have significant implications for the production of cobalt/silica composites where maximizing the functional Co3O4 phase remains the goal for a broad range of catalytic, sensing and materials applications.
Keyword Gas separation
Mesoporous materials
Catalysts
Metal
Oxide
Membranes
Behavior
Hydrocarbons
Xerogels
MCM-41
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 9 times in Scopus Article | Citations
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Created: Sun, 08 Sep 2013, 00:04:19 EST by System User on behalf of School of Chemical Engineering