Preparation of magnetically separable mesoporous Co@carbon/silica composites by the RAPET method

Li, Hongliang, Sang, Jingjing, Zhao, Junhua, Fu, Aiping, Liu, Hui, Xu, Man, Pang, Guangsheng and Zhao, Xiu Song (2012) Preparation of magnetically separable mesoporous Co@carbon/silica composites by the RAPET method. New Journal of Chemistry, 36 11: 2308-2315. doi:10.1039/c2nj40595d

Author Li, Hongliang
Sang, Jingjing
Zhao, Junhua
Fu, Aiping
Liu, Hui
Xu, Man
Pang, Guangsheng
Zhao, Xiu Song
Title Preparation of magnetically separable mesoporous Co@carbon/silica composites by the RAPET method
Journal name New Journal of Chemistry   Check publisher's open access policy
ISSN 1144-0546
Publication date 2012-11
Sub-type Article (original research)
DOI 10.1039/c2nj40595d
Open Access Status Not Open Access
Volume 36
Issue 11
Start page 2308
End page 2315
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2013
Language eng
Formatted abstract
Air-stable metallic Co nanoparticles were incorporated into the pores or anchored onto the external surface of an ordered mesporous carbon/SBA-15 composite by simply treating the cobalt precursor-impregnated surfactant-containing SBA-15 via the Reaction under Autogenic Pressure at Elevated Temperature (abbreviated to RAPET) process, resulting in bifunctional Co@carbon/SBA-15 composites. Surfactant-containing mesoporous SBA-15 (denoted as surf-SBA-15 composite) was firstly impregnated with a cobalt precursor solution and then calcined under autogenic pressure at elevated temperature using a Swagelok-like high-temperature autoclave in an N 2 atmosphere. During the RAPET process, the cobalt precursor impregnated into the channel of the surf-SBA-15 composites decomposed and was reduced by the surfactant species, meanwhile, the surfactant, which was used as a soft template for the formation of mesoporous silica, was carbonized and coated onto the internal and the external surface of mesoporous silica and partially onto the incorporated metallic Co nanoparticles, forming Co nanoparticles encapsulated by a mesoporous carbon/SBA-15 composite (mesoporous Co@carbon/SBA-15) in situ. The products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption-desorption measurements and X-ray diffraction (XRD). The influences of the concentration of cobalt precursors on the morphologies and the magnetic properties of the mesoporous Co@carbon/silica composites were studied. The adsorption/separation ability of the magnetic mesoporous composite to organic guest molecules and the stability of the nanosized metallic Co decorations in air or in an acid environment were also investigated.
Keyword Coated cobalt nanoparticles
Iron particles
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 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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