中文摘要：

以CoCl_2.6H_2O和CH_4N_2S为前驱物,通过超声喷雾热解法,制备了立方相Co_9S_8纳米碎壳和Co_3S_4纳米晶。所制备的样品用XRD,SEM,EDX和FTIR进行了表征,结果发现过量的硫脲和反应时间对产物的形貌有明显影响。通过控制反应温度可以控制样品的物相,并且对空心和实心晶体结构的产生提出了相应的机理。

英文摘要：

Cubic Co_9S_8 fracture structure nanoshells and cubic Co_3S_4 nanocrystallines were prepared by an ultrasonic spray pyrolysis process using cobalt chloride（Co Cl_2·6H_2O） and thiourea（CH_4N_2S） as the starting materials.The as-prepared Co_9S_8 nanoshells and Co_3S_4 nanocrystallines were characterized by X-ray diffraction（XRD）,scanning electron microscope（SEM） with energy-disperse X-ray spectroscopy（EDX） attachment and Fourier-transform infrared（FTIR） spectrometer.It is found that the phase transition could be controlled by adjusting the reaction temperature,while morphologies of final products could be influenced by the molar ratio and reaction time of the precursor.And the possible mechanism for the formation of hollow and solid crystalline structures of the product was proposed.