铜铟硒纳米粉体的水热合成与表征

Hydrothermal Synthesis and Characterization of CuInSe_2 Nanopowders

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.

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.