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Room Temperature Synthesis of Metal Chalcogenides in Ethylenediamine
Yadong Li1, Zhaoyu Wang, Yi Ding
1Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China.
Abstract:
Reaction of sulfur and selenium with elemental or ionic metals in liquid ethylenediamine at room temperature produced metal chalcogenides ME (M = Cu, Sn, Co(2+), Ni(2+), Mn(2+), or Pb(2+); E = S or Se), Ag(2)E, M(2)E(3) (M = Bi or Sb). The results showed that the products had a range of crystalline sizes from 10 to 100 nm. Some reactions produced molecular precursors. Heat treatment of these precursors at 250 degrees C under a N(2) atmosphere induced crystalline chalcogenides. The pre- and postheated metal chalcogenides were analyzed by X-ray diffraction (XRD). Some key compounds are analyzed by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The roles of ethylenediamine in the reaction system are also discussed in this report.
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