Microwave absorption enhancement of 2-dimensional CoZn/C@MoS2@PPy composites derived from metal-organic framework

Yuxin Bi; Mingliang Ma; Yanyan Liu; Zhouyu Tong; Rongzhen Wang; Kwok L Chung; Aijie Ma; Guanglei Wu; Yong Ma; Changpeng He; Pan Liu; Luying Hu

doi:10.1016/j.jcis.2021.04.137

Microwave absorption enhancement of 2-dimensional CoZn/C@MoS₂@PPy composites derived from metal-organic framework

J Colloid Interface Sci. 2021 Oct 15:600:209-218. doi: 10.1016/j.jcis.2021.04.137. Epub 2021 Apr 30.

Authors

Yuxin Bi¹, Mingliang Ma², Yanyan Liu¹, Zhouyu Tong¹, Rongzhen Wang¹, Kwok L Chung¹, Aijie Ma³, Guanglei Wu⁴, Yong Ma⁵, Changpeng He¹, Pan Liu¹, Luying Hu¹

Affiliations

¹ School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, People's Republic of China.
² School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, People's Republic of China. Electronic address: mamingliang@qut.edu.cn.
³ School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, People's Republic of China.
⁴ Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, People's Republic of China.
⁵ School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, People's Republic of China.

PMID: 34030004
DOI: 10.1016/j.jcis.2021.04.137

Abstract

Metal-organic framework (MOF) materials have caused widespread concerns in the field of microwave absorption, due to the unique microstructure and electronic state. Herein, the CoZn/C@MoS₂@polypyrrole (PPy) composites were prepared through MOF self-template method. The MoS₂ sheets and PPy shell incorporated for optimizing impedance matching of two-dimensional (2D) CoZn/C composites. The introduction of MoS₂ sheets and PPy shell endowed the composites with enhanced microwave absorption. The as-prepared CoZn/C@MoS₂@PPy composites showed a minimum reflection loss (RL) of -49.18 dB with the thickness of 1.5 mm. In addition, the effective absorption bandwidth (EAB, RL values exceeding -10 dB) covered 4.56 GHz, which showed greater performances than CoZn/C composites under a lower thickness (<2 mm). This work not only provides a facile route for fabricating MOF-derived carbon-based composites as microwave absorbers, but also broadens the application of MOF materials.

Keywords: Impedance matching; Metal organic frameworks; Microwave absorption; Polypyrrole.