High-entropy Pt18Ni26Fe15Co14Cu27 nanocrystalline crystals in situ grown on reduced graphene oxide with excellent electromagnetic absorption properties

Yue Yu; Wenjing Cui; Zhiqun Xu; Song Wang; Wangsheng Jiang; Ruiji Sun; Lihong Qi; Kai Pan

doi:10.1016/j.jcis.2023.02.055

High-entropy Pt₁₈Ni₂₆Fe₁₅Co₁₄Cu₂₇ nanocrystalline crystals in situ grown on reduced graphene oxide with excellent electromagnetic absorption properties

J Colloid Interface Sci. 2023 Jun:639:193-202. doi: 10.1016/j.jcis.2023.02.055. Epub 2023 Feb 15.

Authors

Yue Yu¹, Wenjing Cui¹, Zhiqun Xu², Song Wang², Wangsheng Jiang¹, Ruiji Sun¹, Lihong Qi³, Kai Pan⁴

Affiliations

¹ College of Physics and Optoelectronics Engineering, Harbin Engineering University, Harbin 150001, China.
² Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China.
³ College of Physics and Optoelectronics Engineering, Harbin Engineering University, Harbin 150001, China. Electronic address: qilihong@126.com.
⁴ Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China. Electronic address: kaipan@hlju.edu.cn.

PMID: 36805744
DOI: 10.1016/j.jcis.2023.02.055

Abstract

The high entropy alloy is a powerful material due to its high hardness, strength, magnetic performance, corrosion resistance, and temperature stability. Moreover, when combined with reduced graphene oxide (rGO), it formed a novel material for electromagnetic (EM) absorption. In this work, monodisperse high entropy alloy nanocrystals combined with rGO to create a new type of high entropy alloy/rGO EM absorption material. A colloidal synthesis strategy was used to prepare high entropy Pt₁₈Ni₂₆Fe₁₅Co₁₄Cu₂₇ nanocrystals with a small size of around 3.3 nm. These nanocrystals then in situ grew uniformly on the surface of rGO to form Pt₁₈Ni₂₆Fe₁₅Co₁₄Cu₂₇/rGO nanocomposite, which were then characterized and tested for EM absorption performance. Compared to the pure high entropy Pt₁₈Ni₂₆Fe₁₅Co₁₄Cu₂₇ nanocrystals, the composite exhibited an improved EM absorption performance with a minimum reflection loss of -41.8 dB at 4.9 GHz and efficient EM wave absorption up to a bandwidth of 2.5 GHz in the 9.4-11.9 GHz band. This novel high entropy alloy/rGO composite has great potential to be used as an excellent material for EM wave absorption.

Keywords: Electromagnetic absorption; High entropy alloys; In situ growth; Interfacial polarization.