Tunable High‐Performance Microwave Absorption of Co1–xS Hollow Spheres Constructed by Nanosheets within Ultralow Filler Loading

• DOI: 10.1002/adfm.201800761
• Publication Date: 2018-06-19T15:12:24Z
• Authors: Xiao‐Juan Zhang; Jia‐Qiang Zhu; Peng‐Gang Yin; Ao‐Ping Guo; An‐Ping Huang; Lin Guo; Guang‐Sheng Wang
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

AbstractAbsorbers with lightweight, low filler loading and broad absorption band are highly desirable for electromagnetic wave absorption field. Here, hollow Co1–xS microspheres constructed by nanosheets are fabricated via a facile synthetic method based on hydrothermal route. As an efficient wave absorber, the Co1–xS hollow spheres demonstrate excellent microwave absorption performance. With a weight content of only 3 wt%, the maximum reflection loss (RL) can reach as strong as −46.1 dB at 13.92 GHz and its qualified frequency bandwidth (with RL value over −10 dB) remarkably achieves 5.6 GHz, covering 35% of the entire measured bandwidth. In addition, compared with other cobalt sulfides (such as CoS2 and Co9S8), the Co1–xS microspheres with hollow structure exhibit more superior absorption intensity and broader qualified bandwidth. Therefore, this work provides a promising approach for the design and synthesis of hollow Co1–xS microspheres with lightweight and high‐performance microwave absorption.