Double-Shelled Yolk鈥揝hell Microspheres with Fe3O4 Cores and SnO2 Double Shells as High-Performance Microwave Absorbers

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• 作者：Jiwei Liu ; Jin Cheng ; Renchao Che ; Junjie Xu ; Mengmei Liu ; Zhengwang Liu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：January 10, 2013
• 年：2013
• 卷：117
• 期：1
• 页码：489-495
• 全文大小：436K
• 年卷期：v.117,no.1(January 10, 2013)
• ISSN：1932-7455

文摘

Double-shelled yolk鈥搒hell microspheres with Fe₃O₄ cores and SnO₂ double shells have been successfully synthesized by combining the versatile sol鈥揼el process and hydrothermal shell-by-shell deposition method. The as-synthesized double-shelled Fe₃O₄@SnO₂ yolk鈥搒hell microspheres have uniform size, unique morphology, well-defined shells, favorable magnetization, large specific surface area, and high porosity and exhibit significantly enhanced microwave absorption properties in terms of both the maximum reflection loss value and the absorption bandwidth. The excellent microwave absorption properties of these microspheres may be attributed to the unique double-shelled yolk鈥搒hell structure and synergistic effect between the magnetic Fe₃O₄ cores and dielectric SnO₂ shells.