NiCo alloy/C nanocomposites derived from a Ni-doped ZIF-67 for lightweight microwave absorbers

Ximing Zhang; Jingyu Wang; Yang Fan; Hengdong Ren; Zhenying Liu; Yanfen Wang; Yin Liu; Hongcun Bai; Lingbing Kong

doi:10.1088/1361-6528/ac0ac3

NiCo alloy/C nanocomposites derived from a Ni-doped ZIF-67 for lightweight microwave absorbers

Nanotechnology. 2021 Jul 2;32(38). doi: 10.1088/1361-6528/ac0ac3.

Authors

Ximing Zhang¹, Jingyu Wang¹, Yang Fan¹, Hengdong Ren¹, Zhenying Liu¹, Yanfen Wang¹, Yin Liu^{1

2

3}, Hongcun Bai⁴, Lingbing Kong⁵

Affiliations

¹ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, People's Republic of China.
² State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, People's Republic of China.
³ Anhui International Joint Research Center for Nano Carbon- based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, Anhui, People's Republic of China.
⁴ State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, Ningxia, People's Republic of China.
⁵ College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, Guangdong, People's Republic of China.

PMID: 34116524
DOI: 10.1088/1361-6528/ac0ac3

Abstract

In this work, we prepared NiCo alloy/C with rhombic dodecahedron structure and superior microwave absorption performance by using ZIF-67 as the raw material. The rhombic dodecahedron NiCo alloy/C was with rough particles on the surface was photographed by field emission scanning electron microscopy. By adjusting the doping amount of Ni and the temperature of pyrolysis, improved the impedance matching of NiCo alloy/C. Specifically, NiCo alloy/C exhibits a minimum reflection loss of -65.48 dB at 13.48 GHz, while the thickness is 1.63 mm. Defects introduced in the Ni doping process and the special rhombic dodecahedral structure can cause multiple loss mechanisms. Therefore, this NiCo alloy/C composite has the potential to be a potential microwave absorber material with lightweight and high microwave absorption properties.

Keywords: NiCo alloy; in situ pyrolysis; microwave absorption; ordered mesoporous carbon.