Sulfur vacancy regulation and multipolarization of NixCo1S nanowires-decorated biotemplated structures to promote microwave absorption

Dashuang Wang; Youzhong Hu; Zhiyuan Cui; PaiXuan Yang; Zhilan Du; Yi Hou; Pingan Yang; Jinsong Rao; Can Wang; Yuxin Zhang

doi:10.1016/j.jcis.2023.05.112

Sulfur vacancy regulation and multipolarization of NixCo1S nanowires-decorated biotemplated structures to promote microwave absorption

J Colloid Interface Sci. 2023 Sep 15:646:991-1001. doi: 10.1016/j.jcis.2023.05.112. Epub 2023 May 22.

Authors

Dashuang Wang¹, Youzhong Hu¹, Zhiyuan Cui¹, PaiXuan Yang¹, Zhilan Du¹, Yi Hou², Pingan Yang³, Jinsong Rao¹, Can Wang¹, Yuxin Zhang⁴

Affiliations

¹ College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
² College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
³ College of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.
⁴ College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. Electronic address: zhangyuxin@cqu.edu.cn.

PMID: 37245268
DOI: 10.1016/j.jcis.2023.05.112

Abstract

It is a novel and practical method to use natural porous biomaterials as microwave absorber. In this study, Ni_xCo₁S nanowires (NWs)@diatomite (De) composites with one-dimensional (1D)-NWs and three-dimensional(3D)-De composites were prepared by a two-step hydrothermal method using De as template. The effective absorption bandwidth (EAB) of the composite reaches 6.16 GHz at 1.6 mm and 7.04 GHz at 4.1 mm, covering the entire Ku band, and the minimum reflection loss (RLmin) is less than -30 dB. The excellent absorption performance is mainly due to the bulk charge modulation provided by the 1D NWs and the extended microwave transmission path within the absorber, coupled with the high dielectric loss and magnetic loss of the metal-NWS after vulcanization. We present a high-value method that combines vulcanized 1D materials with abundant De to achieve the lightweight broadband efficient microwave absorption at the first time.

Keywords: Biological core–shell materials; Diatomite; Microwave absorbing; Nanowires.