Carbonized zeolitic imidazolate framework-67/polypyrrole: A magnetic-dielectric interface for enhanced microwave absorption properties

Sajid Ur Rehman; Mingze Sun; Mingsheng Xu; Jian Liu; Rida Ahmed; Muhammad Adnan Aslam; Rana Ali Ahmad; Hong Bi

doi:10.1016/j.jcis.2020.04.053

Carbonized zeolitic imidazolate framework-67/polypyrrole: A magnetic-dielectric interface for enhanced microwave absorption properties

J Colloid Interface Sci. 2020 Aug 15:574:87-96. doi: 10.1016/j.jcis.2020.04.053. Epub 2020 Apr 12.

Authors

Sajid Ur Rehman¹, Mingze Sun¹, Mingsheng Xu¹, Jian Liu¹, Rida Ahmed², Muhammad Adnan Aslam³, Rana Ali Ahmad⁴, Hong Bi⁵

Affiliations

¹ School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, PR China.
² Laboratory of Dielectric Functional Materials, School of Physics & Material Science, Anhui University, Hefei 230601, PR China.
³ High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, PR China.
⁴ Hefei National Lab for Physical Sciences at Microscale, University of Science and Technology, Hefei 230026, PR China.
⁵ School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, PR China. Electronic address: bihong@ahu.edu.cn.

PMID: 32305731
DOI: 10.1016/j.jcis.2020.04.053

Abstract

Due to the high electromagnetic interference (EMI) pollution, electromagnetic wave (EMW) absorption materials have risen as an important research area in material science and technology. Herein, the prepared carbonized ZIF-67 (CZIF) nanocomposites with polypyrrole (PPy) showed significantly enhanced electromagnetic wave absorption performance. The CZIF-PPy nanocomposites were prepared by the solvothermal and in-situ polymerization method. The CZIF-PPy nanocomposites possess a decent reflection loss (RL) value between the 2-18 GHz frequency range. The enhanced surface properties and magnetic-dielectric interfacial polarization plays an important role to achieve higher reflection loss and broader absorption bandwidth. This work explains the importance of magnetic-dielectric interface and may lead to design of more advanced hybrid electromagnetic wave absorption systems.

Keywords: Dielectric; Interfacial polarization; Polypyrrole; Reflection loss; Zeolatic imidazolte framework.