Facile synthesis of the one-dimensional flower-like yolk-shell Fe3O4@SiO2@NiO nanochains composites for high-performance microwave absorption

• Published in: Journal of alloys and compounds 2020-11, Vol.843, p.155199, Article 155199
• Main Authors: Ma, Mingliang, Li, Wenting, Tong, Zhouyu, Huang, Weibo, Wang, Rongzhen, Lyu, Ping, Ma, Yong, Wu, Guanglei, Yan, Qi, Li, Pingxin, Yao, Xiangyang
• Format: Article
• Language: English
• Subjects: 1D nanochains; Anisotropy; Flower-like structure; Iron oxides; Microwave absorbers; Microwave absorption; Microwave attenuation; Nickel oxides; Silicon dioxide; Thin films; Yolk-shell
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.155199

One-dimensional (1D) microwave absorbers have attracted wide attention in the field of microwave absorption (MA) because of the significant anisotropy and great dielectric attenuation of 1D architecture. In this work, the novel 1D flower-like yolk-shell Fe3O4@SiO2@NiO (FSN) nanochains have been fabricated through a modified Stöber and a simple hydrothermal method. The unique 1D flower-like yolk-shell architectures have large surfaces, multiple interfaces and void spaces. Benefitting from these advantages, the FSN nanochains showed excellent MA properties. Compared with the sample loaded with 10 wt% 1D flower-like yolk-shell FSN nanochains, the sample loaded with 30 wt% showed strong MA performance with a minimum reflection loss (RL) value of −54.28 dB (12.9 GHz) and an effective absorption bandwidth of 4.0 GHz (11.05–15.05 GHz) at the thickness of 2.54 mm. The 1D flower-like yolk-shell FSN nanochains with strong absorption, broad absorption bandwidth and thin layers, provided a new method for fabricating 1D MA materials and will become the promising candidates in the practical MA fields. •One-dimensional yolk-shell flower-like Fe3O4@SiO2@NiO nanochains were synthesized successfully.•The yolk-shell structure was obtained while the NiO nanosheets grew on Fe3O4@SiO2 nanochains by the hydrothermal method.•The microwave absorption properties of Fe3O4@SiO2@NiO nanochains composites were elucidated in depth.•The strongest absorption of −54.28 dB and the effective absorption bandwidth of 4.0 GHz can be obtained.