Ingeniously enhanced ferromagnetism in chemically-reduced 2D Ti3C2TX MXene
Ingeniously enhanced ferromagnetism in chemically-reduced 2D Ti3C2TX MXene
复制标题
化学还原 2D Ti3C2TX MXene 中巧妙增强的铁磁性
DOI：
10.1016/j.matchemphys.2022.126155
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发表时间：
2022
影响因子：
4.6
通讯作者：
Yan, Fei
中科院分区：
文献类型：
--
作者：
Limbu, Tej B.;Kumari, Shalini;Wang, Ziqiao;Dhital, Chetan;Li, Qi;Tang, Yongan;Yan, Fei
化学还原法是一种简便、成本效益高的调节纳米材料物理和化学性质的技术。在这里，我们证明了增强的磁行为的Ti 3C 2 TxMXene后，其化学还原小瓶抗坏血酸处理。小铁磁回线已被观察到低于50 K的氢氟酸（HF）蚀刻的Al层从Ti 3AlC 2制备的Ti 3C 2 Tx。这种铁磁有序的自旋显着增强通过化学还原Ti 3C 2 Txwithl-抗坏血酸。铁磁磁滞回线，观察到减少Ti 3C 2 Tx（r-Ti 3C 2 Tx）高达150 K，表明一个显着的上移的顺磁性铁磁转变温度，推向室温。抗坏血酸处理后，r-Ti_3C_2 Tx晶体的铁磁性增强，铁磁转变温度升高，这可能是由于Ti-3d轨道上的未成对电子局域化和不饱和Ti原子数增加所致。化学还原小瓶抗坏血酸处理显示了一种有前途的途径，对各种MXene材料的磁性的调制和增强，用于开发二维金属软铁磁体和自旋电子器件。
Chemical reduction is a facile and cost-effective technique for the modulation of the physical and chemical properties of nanomaterials. Herein, we demonstrate an enhancement of the magnetic behavior of Ti3C2TxMXene after its chemical reduction vial-ascorbic acid treatment. Small ferromagnetic loops have been observed below 50 K for Ti3C2Txprepared by hydrofluoric acid (HF) etching of Al layers from Ti3AlC2. Such a ferromagnetic ordering of spins was significantly enhanced via a chemical reduction of Ti3C2Txwithl-ascorbic acid. Ferromagnetic hysteresis loops were observed for reduced Ti3C2Tx(r-Ti3C2Tx) up to 150 K indicating a significant upshift of the paramagnetic to the ferromagnetic transition temperature, pushing towards room temperature. The enhancement of ferromagnetism and upshift of the ferromagnetic transition temperature could be attributed to the localized unpaired electron in Ti-3d orbital of the r-Ti3C2Txcrystal and increase in the number of unsaturated Ti atoms uponl-ascorbic acid treatment. Chemical reduction vial-ascorbic acid treatment shows a promising pathway towards the modulation and enhancement of magnetism in various MXene materials for the development of 2D metallic soft ferromagnets and spintronic devices.