二硫化钛是一种无机化合物,化学式 TiS2。它可用于蓄电池的阴极材料。
TiS2为碘化镉 (CdI2)结构。一半的八面体空隙都被 Ti4+填充。[2][3]每个钛都和六个硫配位,形成八面体结构。每个硫都和三个钛连接,形成为三角锥结构。其它二硫属化物都有类似的结构,但有些,例如MoS2不是这种结构。[3] 二硫化钛的空间群为P3m1.[4]Ti-S键的键长为2.423 Å。[5]
二硫化钛可以由硫和钛在 500 °C下反应而成。[6]
- Ti + 2 S → TiS2
更容易的制备方法是反应四氯化钛和硫化氢,但纯度会比直接反应低。[6]
- TiCl4 + 2 H2S → TiS2 + 4 HCl
这个反应已应用于化学蒸汽沉积形成TiS2薄膜。硫醇和有机二硫化物可以代替硫化氢。[7]
其它硫化钛也是已知的。[8]
TiS2 在空气中不稳定。[6]加热时,它会被氧化成二氧化钛:
- TiS2 + O2 → TiO2 + 2 S
TiS2 也对水敏感:
- TiS2 + 2H2O → TiO2 + 2 H2S
加热时,TiS2 放出硫,形成三硫化二钛:
- 2 TiS2 → Ti2S3 + S
Smart, Lesley E.; Moore, Elaine A. Solid State Chemistry: An Introduction, Third Edition. Boca Raton, FL: Taylor & Francis. 2005.
Overton, Peter; Rourke, Tina; Weller, Jonathan; Armstrong, Mark; Atkins, Fraser. Shriver and Atkins' Inorganic Chemistry 5th Edition. Oxford, England: Oxford University Press. 2010.
Aksoy, Resul; Selvi, Emre; Knudson, Russell; Ma, Yanzhang. A high pressure x-ray diffraction study of titanium disulfide. Journal of Physics: Condensed Matter. 2009, 21 (2): 025403. doi:10.1088/0953-8984/21/2/025403.
Lewkebandara, T. Suren; Winter, Charles H. CVD routes to titanium disulfide films. Advanced Materials. 1994, 6 (3): 237–9. doi:10.1002/adma.19940060313.
Murray, J. L. The S−Ti (Sulfur-Titanium) system. Bulletin of Alloy Phase Diagrams. 1986, 7 (2): 156–163. doi:10.1007/BF02881555.
- http://authors.library.caltech.edu/5456/1/hrst.mit.edu/hrs/materials/public/Titanium_disulfide.htm (页面存档备份,存于互联网档案馆)
- Tao, Y.; Wu, X.; Zhang, Y.; Dong, L.; Zhu, J.; Hu, Z. Surface-assisted synthesis of microscale hexagonal plates and flower-like patterns of single-crystalline titanium disulfide and their field-emission properties. Crystal Growth and Design. 2008, 8 (8): 2990–2994. doi:10.1021/cg800113n.
- Zhang, Y.; Li, Z.; Jia, H.; Luo, X.; Xu, J.; Zhang, X.; Yu, D.J. TiS2 whisker growth by a simple chemical-vapor deposition method. Journal of Crystal Growth. 2006, 293 (1): 124–127. doi:10.1016/j.jcrysgro.2006.03.063.