Bottom-up, scalable synthesis of anatase nanofilament-based two-dimensional titanium carbo-oxide flakes-猫眼课题宝

DOI：

10.1016/j.mattod.2021.10.033

发表时间：

2021-12

期刊：

Materials Today

影响因子：

24.2

通讯作者：

中科院分区：

材料科学1区

文献类型：

作者：

H. Badr;Tarek Aly Elmeligy;M. Carey;Varun Natu;M. Q. Hassig;Craig Johnson;Qiang Qian;Christopher Y. Li;K. Kushnir;Erika Colin-Ulloa;L. Titova;Julia L. Martin;R. Grimm;R. Pai;V. Kalra;Avishek Karmakar;Anthony Ruffino;Stefan Masiuk;Kun Liang;Michael Naguib;Olivia R. Wilson;Andrew J. D. Magenau;Kiana Montazeri;Yucheng Zhu;Hao Cheng;T. Torita;Masashi Koyanagi;Akimaro Yanagimachi;T. Ouisse;M. Barbier;F. Wilhelm;A. Rogalev;Jonas Björk;P. Persson;Johanna Rosen;Yong Hu;M. Barsoum

二维(2D)材质具有3D材质所不具备的优势。传统的体相合成2D材料的方法主要是通过蚀刻层状固体。在这里，我们通过自下而上的方法将10个二元和三元碳化钛、氮化物、硼化物、磷化物和硅化物转化为2D薄片，方法是将它们浸入四甲基氢氧化铵溶液中，温度范围为25-85℃。根据X射线衍射、密度泛函理论、X射线光电子能谱、电子能量损失、拉曼光谱、X射线近边吸收光谱、透射和扫描电子显微镜图像以及选区衍射谱，我们得出结论：所得到的薄片是含碳的锐钛矿层，其横截面由≈6×10？2纳米丝组成，其中一些纳米丝只有几个微米长。其中一些薄膜制成的电极在锂离子和锂硫体系中表现良好。这些材料还降低了癌细胞的活力，因此在生物医学应用中显示出潜力。在近环境条件下，用非层状、廉价的绿色前驱体(如TiC)合成2D材料是一种范式转变，无疑将开辟新的令人兴奋的研究和应用途径。

Two-dimensional (2D) materials offer advantages that their 3D counterparts do not. The conventional method for the bulk synthesis of 2D materials has predominantly been through etching layered solids. Herein, we convert – through a bottom-up approach – 10 binary and ternary titanium carbides, nitrides, borides, phosphides, and silicides into 2D flakes by immersing them in a tetramethylammonium hydroxide solution at temperatures in the 25–85 °C range. Based on X-ray diffraction, density functional theory, X-ray photoelectron, electron energy loss, Raman, X-ray absorption near edge structure spectroscopies, transmission and scanning electron microscope images and selected area diffraction, we conclude that the resulting flakes are carbon containing anatase-based layers that are, in turn, comprised of ≈ 6 × 10 Å2nanofilaments in cross-section some of which are few microns long. Electrodes made from some of these films performed well in lithium-ion and lithium-sulphur systems. These materials also reduce the viability of cancer cells thus showing potential in biomedical applications. Synthesizing 2D materials, at near ambient conditions, with non-layered, inexpensive, green precursors (e.g., TiC) is paradigm shifting and will undoubtedly open new and exciting avenues of research and applications.

Bottom-up, scalable synthesis of anatase nanofilament-based two-dimensional titanium carbo-oxide flakes

文献摘要

被引文献

相似文献