铜铟硒纳米粉体的水热合成与表征

Hydrothermal Synthesis and Characterization of CuInSe2 Nanopowders

摘要:

以水为溶剂、CuCl2, InCl3和Se粉为反应物、NaBH4为还原剂采用低温水热法在200℃ 反应18h得到了 CuInSe2纳米粉末.用X射线粉末衍射仪、X射线光电子能谱仪、场发射扫描电子显微镜、透射电子显微镜对粉体的结构、形貌、成分进行表征.研究表明：所生成纳米粉末的平均颗粒直径在100nm左右；反应温度和时间对产物的生成和形貌有重要影响，在200℃以上反应有利于获得黄铜矿型CuInSe2 纳米粉末的纯相，且产物的尺寸随着反应时间的延长而增大.并对CuInSe2粉体的形成机理进行了简单探讨.

Abstract:

Copper indium diselenide nanopowders were hydrothermallly synthesized (200℃, 18h)by using water as the solvent, CuCl2, InCl3and Se powder as the starting materials, sodium borohydride as the reductant repectively. X ray powder diffraction (XRD), X ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and high resolution transmission electron microscopy (HRTEM)were used to characterize the obtained nanopowders. The results demonstrate that the average diameter of the as synthesized nanoparticles is around 100 nm; the reaction temperature is important for the formation of CuInSe2, the powders prepared under the temperature above 200 ℃ is pure CuInSe2 with chalcopyrite structure; time has a great effect on the morphologies of the as prepared powders, the particle size increases as the reaction time is prolonged. Furthermore, a possible formation mechanism for product was also proposed.