Rational Design of Hierarchical SiO2@TiO2 Composite with Large Internal Void Space for High-Performance Microwave Absorption
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The design and development of excellent microwave absorption (MA) material is significant for healthcare, electronic, and security industries. Herein, a sophisticated composite with the advantages of large interlayer space, nanoparticles with small size, and hierarchical nanostructure (core@shell@void@shell configuration) simultaneously is demonstrated for the first time. Such unique SiO2@TiO2 nanoparticle was fabricated via a multi-step process. Associating maximum reflection loss value can reach –35.2 dB in certain frequency of 11 GHz and thickness of 3.0 mm. Small-sized TiO2 nanoparticles (about 6 nm) in first coating and large gap between TiO2 coating layers are significantly critical for the superior MA performance. Our work points a new direction to rationally construct high-performance microwave absorber.
Keywords:microwave absorption hierarchical nanostructure SiO2@TiO2 interstitial void space multilayer
Xuqiang Ji and Yusheng Niu contributed equally to this work. This work was supported by Qingdao Science and Technology Planning Project (17-6-3-15-gx).
- 16.L. Cao, D. Chen, and R. Caruso, Angew. Chem. Int. Ed. 52, 10986 (20131).Google Scholar