Abstract:

In recent years，nanocomposite materials have been widely applied in the fields of petroleum chemical engineering and chemical engineering catalyst.The synthesis of PbS nanocrystallites from an airstable singlesource molecular precursor （lead diethyldithiocarbamate：PbDDTC） under mild conditions is achieved by two simple steps，firstly，the PbDDTC is directly prepared through the precipitation reaction of lead acetate and sodium diethyldithiocarbamate in distilled water at room temperature，secondly，without the use of any extra surfactant/template，pure PbS nanocrystallites with different shape can be obtained just via solvothermal decomposition of the PbDDTC in four different solvents （including water，ethanol，ethylene glycol，ethylenediamine）.The obtained PbS nanocrystallites with the diameter of 50~100nm are characterized by XRay Diffractometer（XRD），Scanning Electronic Microscope（SEM）and Transparent Electronic Microscope（TEM），etc.It is proved that the obtained crystallites are pure PbS nanocrystallites with the diameter of 100~200nm.The selection of different solvents has an influence on the feature of the products.

Key words: nanocrystallites, singlesource molecular precursor, hydrothermal/solvothermal, petroleum chemical engineering, chemical engineering catalyst