First demonstration of possible two-dimensional MBene CrB derived from MAB phase Cr_2AlB_2  

作　　者：Haiming Zhang Huimin Xiang Fu-zhi Dai Zhili Zhang Yanchun Zhou 

机构地区：[1]Science and Technology on Advanced Functional Composite Laboratory,Aerospace Research Institute of Materials & Processing Technology [2]School of Mechanical and Electrical Control Engineering,Beijing Jiaotong University

出　　处：《Journal of Materials Science & Technology》2018年第11期2022-2026,共5页材料科学技术（英文版）

基　　金：supports from the National Natural Science Foundation of China under grant No. 51672064 and No. U1435206;the Beijing Municipal Science & Technology Commission under grant No. Z151100003315012 and No. D161100002416001

摘　　要：In this communication, the possibility for the preparation of two-dimensional MBene CrB from MAB phase Cr2AlB2 is demonstrated for the first time. Herein M is a transition metal, A is a group IIIAor IVA element and B is boron; MAB phases are layered transition metal ternary borides, MBene is used to emphasize the loss of A group element from the parent MAB phases and to highlight the 2 D nature. The possible 2 D CrB nano sheets are prepared by selectively etching out Al layers from Cr2AlB-2 by immersing the Cr2AlB2 powders in dilute HCl solution at room temperature. The as-prepared 2 D CrB nano sheets are examined using X-ray diffraction and scanning electron microscopy and energy dispersive X-ray spectroscopy（EDS）. In addition, different structure models are built to explain the observed phenomena.The discovery in this work opens a door to the synthesis of a large number of new 2 D MBenes from MAB phases.In this communication, the possibility for the preparation of two-dimensional MBene CrB from MAB phase Cr2AlB2 is demonstrated for the first time. Herein M is a transition metal, A is a group IIIAor IVA element and B is boron; MAB phases are layered transition metal ternary borides, MBene is used to emphasize the loss of A group element from the parent MAB phases and to highlight the 2 D nature. The possible 2 D CrB nano sheets are prepared by selectively etching out Al layers from Cr2AlB-2 by immersing the Cr2AlB2 powders in dilute HCl solution at room temperature. The as-prepared 2 D CrB nano sheets are examined using X-ray diffraction and scanning electron microscopy and energy dispersive X-ray spectroscopy（EDS）. In addition, different structure models are built to explain the observed phenomena.The discovery in this work opens a door to the synthesis of a large number of new 2 D MBenes from MAB phases.

关 键 词：2D CrB nano sheets MBene MAB phases EXFOLIATION Transition metal borides 

分 类 号：TB34[一般工业技术—材料科学与工程]