Stabilising intrinsic room-temperature ferromagnetic two-dimensional semimetallic Cr2CTx MXene by epitaxial self-intercalation of H2O-etched Cr2(AlLi)C

Xue Li; Zhenying Huang; Hongjie Wang; Wenqiang Hu; Weici Zhuang; Qun Yu; Youbo Wu; Qianwen Sun; Yang Zhou; Guangjin Chen; Junji Mou; Zhexuan Zhang

doi:10.26599/JAC.2024.9220955

Journal of Advanced Ceramics (Oct 2024)

Stabilising intrinsic room-temperature ferromagnetic two-dimensional semimetallic Cr2CTx MXene by epitaxial self-intercalation of H2O-etched Cr2(AlLi)C

Xue Li,
Zhenying Huang,
Hongjie Wang,
Wenqiang Hu,
Weici Zhuang,
Qun Yu,
Youbo Wu,
Qianwen Sun,
Yang Zhou,
Guangjin Chen,
Junji Mou,
Zhexuan Zhang

Affiliations

Xue Li: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Zhenying Huang: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Hongjie Wang: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Wenqiang Hu: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Weici Zhuang: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Qun Yu: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Youbo Wu: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Qianwen Sun: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Yang Zhou: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Guangjin Chen: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Junji Mou: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Zhexuan Zhang: Institute of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China

DOI: https://doi.org/10.26599/JAC.2024.9220955
Journal volume & issue: Vol. 13, no. 10
pp. 1546 – 1552

Abstract

Read online

Physical properties, such as electrochemical and electromagnetic properties, of two-dimensional MXenes can be improved by enhancing their stability. However, MXenes fabricated via acid etching contain defects, which affect their physical properties. In this study, a method to effectively remove Al residues using only water during MXene fabrication while maintaining structural stability is proposed. The fabrication and intercalation of MXenes are controlled via epitaxial self-intercalation of H2O-etched Cr2(AlLi)C. On the basis of this mechanism, the room-temperature ferromagnetism of two-dimensional few-layered Cr2CTx MXenes, which has a specific saturation magnetization of ~0.26 emu/g and a Curie temperature of > 353 K, is experimentally verified. The calculated electronic band structure implies that the semimetal Cr2CTx MXene has a band gap of 0.75 eV. This study opens new possibilities for the research and applications of industrial-scale manufacturing of MXenes and 2D semiconductors.

Published in Journal of Advanced Ceramics

ISSN: 2226-4108 (Print); 2227-8508 (Online)
Publisher: Tsinghua University Press
Country of publisher: China
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: https://www.sciopen.com/journal/2226-4108

About the journal

Abstract

Keywords