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Abstract:
The home-made monodisperse SiO2 submicrospheres were coated with β-FeOOH by a new solution growth method. The size of SiO2 submicrospheres had great influence on the microstructures of β-FeOOH coatings. When the average diameter of the submicrospheres was 250 nm, the β-FeOOH coating was uniform and the average thickness of β-FeOOH coatings was about 35 nm after the first cycle of coating. The thickness of β-FeOOH coatings increased greatly with multistep coating. After three cycles of coating, the thickness of β-FeOOH coatings increased to about 100 nm. The core-shell composites were immersed in NaOH solution (5%, mass fraction) at 40°C for 24 h to remove the silica cores and then calcined at 600°C for 24 h to prepare the monodisperse α-Fe2O3 hollow submicrospheres. The α-Fe2O3 shells in the hollow submicrospheres were constructed with α-Fe2O3 nanorods interconnected.
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Chemical Journal of Chinese Universities
ISSN: 0251-0790
Year: 2010
Issue: 6
Volume: 31
Page: 1098-1102
1 . 0 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
JCR Journal Grade:3
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0