Citation: MENG Shao-cong, WANG Hong, QING Ming, QIU Cheng-wu, YANG Yong, LI Yong-wang. Preparation and characterization of SiO₂@Fe₂O₃ core-shell catalysts[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(6): 692-700. shu

Preparation and characterization of SiO₂@Fe₂O₃ core-shell catalysts

MENG Shao-cong ^1,2 ,
WANG Hong ^3,4 ,
QING Ming ^3,4 ,
QIU Cheng-wu ^1,2 ,
YANG Yong ^1,3,4,, ,
LI Yong-wang ^1,3,4

1.
1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: YANG Yong,
Received Date: 13 March 2015
Available Online: 13 April 2015
Fund Project: 国家高技术研究发展计划(863计划,2011AA05A205)。 (863计划,2011AA05A205)

The monodisperse SiO₂ microspheres with average diameter of 230 nm made by optimized Stöber method were used as core to prepare core-shell structure SiO₂@Fe₂O₃ catalysts with different shell thickness through hydrolysis precipitation. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ physical adsorption and X-ray diffraction (XRD) were used to characterize the size, structure and morphology of catalysts and the effects of different preparation condition on morphology were discussed. The characterization results indicate that SiO₂@Fe₂O₃ catalysts possess obvious core-shell structure and the spherical morphology of catalyst is kept. Iron oxide nanoparticles are attached to the silica surface through hydroxyl-bond and a 2~10 nm thick dense shell is formed.
- core-shell structure,
- iron-based catalysts,
- SiO₂ microspheres,
- nanoparticles
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Preparation and characterization of SiO₂@Fe₂O₃ core-shell catalysts