Synthesis and microwave absorption properties of coralloid core-shell structure NiS/Ni3S4@PPy@MoS2 nanowires

• Published in: Journal of colloid and interface science 2021-10, Vol.599, p.262-270
• Main Authors: Huang, Weibo, Tong, Zhouyu, Bi, Yuxin, Ma, Mingliang, Liao, Zijian, Wu, Guanglei, Ma, Yong, Guo, Siyu, Jiang, Xiaoyu, Liu, Xueping
• Format: Article
• Language: English
• Subjects: Chalcogenides; Coralloid core-shell structure; Microwave absorption; NiS/Ni3S4@PPy@MoS2 nanowires
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2021.04.107

[Display omitted] Herein, coralloid core-shell structure NiS/Ni3S4@PPy@MoS2 nanowires were elaborately designed and successfully synthesized through a three-step route to obtain exceptional microwave absorption (MA) properties. Ni nanowires were first fabricated, and then used as the substrate to be coated with a layer of PPy. Ni chalcogenides were obtained by using Ni nanowire as sacrificial templates while growing MoS2 nanorods by hydrothermal method. Both the one-dimensional (1D) core-shell structure and the coralloid surface generated by MoS2 nanorods were beneficial for the attenuation of microwaves. After investigating the electromagnetic properties of different loading content absorbers (30 wt.%, 40 wt.% and 50 wt.%), it is found that the 50 wt.% loading absorber has the optimal MA performance. The minimum reflection loss (RLmin) value can reach −51.29 dB at 10.1 GHz with a thickness of 2.29 mm, and the corresponding effective absorption bandwidth (EAB, RL