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二硫化钛

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二硫化钛
别名 硫化钛,硫化钛(IV)
识别
CAS号 12039-13-3  ✓
PubChem 61544
SMILES
InChI
EINECS 232-223-6
性质
化学式 TiS2
摩尔质量 111.997 g·mol⁻¹
外观 黄色固体
气味 臭鸡蛋[1]
密度 3.22 g/cm3
溶解性 反应,形成硫化氢[1]
结构
晶体结构 六方晶系
空间群 P3m1, No. 164
配位几何 八面体型
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。

二硫化钛是一种无机化合物,化学式 TiS2。它可用于蓄电池阴极材料。

结构

TiS2碘化镉 (CdI2)结构。一半的八面体的洞都被 Ti4+填充。[2][3]每个 Ti 中心都和六个硫离子配位,形成八面体型结构。每个硫离子都和三个 Ti 中心连接,其中的 S 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]

制备

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]

性质

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

参考资料

  1. ^ 1.0 1.1 Datenblatt Titan(IV)-sulfid bei AlfaAesar, abgerufen am 23. August 2011.
  2. ^ Smart, Lesley E.; Moore, Elaine A. Solid State Chemistry: An Introduction, Third Edition. Boca Raton, FL: Taylor & Francis. 2005. 
  3. ^ 3.0 3.1 Overton, Peter; Rourke, Tina; Weller, Jonathan; Armstrong, Mark; Atkins, Fraser. Shriver and Atkins' Inorganic Chemistry 5th Edition. Oxford, England: Oxford University Press. 2010. 
  4. ^ 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. 
  5. ^ Chianelli, R.R.; Scanlon, J.C.; Thompson, A.H. Structure refinement of stoichiometric TiS2. Materials Research Bulletin. 1975, 10: 1379–1382. doi:10.1016/0025-5408(75)90100-2. 
  6. ^ 6.0 6.1 6.2 Mckelvy, M. J.; Claunsinger, W. S. Titanium Disulfide. Inorganic Syntheses. 1995, 30: 28–32. doi:10.1002/9780470132616.ch7. 
  7. ^ Lewkebandara, T. Suren; Winter, Charles H. CVD routes to titanium disulfide films. Advanced Materials. 1994, 6 (3): 237–9. doi:10.1002/adma.19940060313. 
  8. ^ Murray, J. L. The S−Ti (Sulfur-Titanium) system. Bulletin of Alloy Phase Diagrams. 1986, 7 (2): 156–163. doi:10.1007/BF02881555. 

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