Microwave Synthesis of Hematene and Other Two-Dimensional Oxides

被引:41
作者
Chahal, Sumit [1 ]
Kauzlarich, Susan M. [2 ]
Kumar, Prashant [1 ,3 ]
机构
[1] Indian Inst Technol Patna, Dept Phys, Patna 801106, Bihar, India
[2] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA
[3] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
来源
ACS MATERIALS LETTERS | 2021年 / 3卷 / 05期
关键词
ROOM-TEMPERATURE SYNTHESIS; CARBON NANOTUBES; NEGATIVE PHOTOCONDUCTIVITY; METAL; REDUCTION; GRAPHENE; SEMICONDUCTORS; DEPOSITION; HEMATITE; NANORODS;
D O I
10.1021/acsmaterialslett.1c00102
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
With the emergence of graphene, the first two-dimensional (2D) material, many other 2D materials have been discovered and examined for novel applications. Various synthesis approaches have been employed for 2D Xenes, nitrides, carbide, and oxides to obtain high-quality and largequantity production. Among them, 2D oxides have gained researcher's attention for their magnetic, electronic, and catalytic properties. In this Article, we report single-step and scalable synthesis of hematene (a 2D atomic layer of iron oxide (Fe2O3)) and 2D metal oxides (2DMOs), e.g., chromium oxide, copper oxide, etc., by following a similar synthesis protocol. Metal chlorides dispersed in dimethylformamide (DMF) solvent immediately convert to the corresponding metal oxides upon microwave irradiation. Direct microwave solid-phase synthesis has also been explored and compared with liquid-phase microwave synthesis of hematene. Crystallographic structures of synthesized hematene were obtained by high-resolution transmission electron microscopy (HRTEM) and chemical identification was done by X-ray photoelectron (XPS) and Raman spectroscopy. In addition, magnetic measurements reveal the room-temperature ferromagnetic ordering of hematene with a saturation magnetization of 0.24 emu/g (at 300 K) and 1.08 emu/g (at 60 K). Field-cooled and zero-field cooled measurements clearly demonstrate a high Curie temperature of similar to 376 K. Versatility of the synthesis technique has been demonstrated by employing the same protocol to the successful synthesis of a variety of metal oxides. This synthesis route permits a simple, inexpensive, efficient, and scalable production of 2DMOs.
引用
收藏
页码:631 / 640
页数:10
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