Synthesis And Characterization Of Two Kinds Of Binary Chalcogenide:PbS And FeS₂ Nanomaterial

In recent years,energy has been the important material basis of people's lives,in the human social development,advances in productivity,economic growth play an important role.Nowadays,the energy mainly comes from coal,oil,gas and other resources,but these resources is non-renewable resources,and in use process,will produce a lot of pollution gases,harm to human survival environment.Therefor,development and exploitation of new,clean and renewable energy is the major issues today.Solar energy as a new type of clean energy more and more get the favor of people,so researchers produce a series of solar cells,to better use of solar energy.Traditional silicon-based solar cells have been put into production,and achieved good results,however,in the process of production,silicon solar cells will produce environmental pollution substances,therefore,in the development of the future,the development of silicon-based solar cells will be limited.Another kind of new solar cell is copper indium gallium selenide?CIGS?solar cells,however,this kind of battery contains elements such as gallium,indium,which are the rare earth storage elements,which makes this kind of solar cells cannot be wide-scale used,in addition,gallium and indium are toxic,which also limited the use of this kind of solar cells.Thus,we need to develop new type of solar cell material,to solve the restrictions,solve the problem.This paper mainly studied the two binary chalcogenide: galena?PbS?and iron sulfide?FeS₂?,both can be used in solar cell production,and has been proved that using both made of solar cells have a high conversion efficiency.In this paper,the main content is using simple methods to synthesis the two binary chalcogenide,then their structural and morphology were characterized.the main content is divided into two aspects:1.Spherical Pb S nanoparticles were synthesized from lead acetate and thioacetamide as precursor at room temperature under the common action of sodium dodecyl sulfate?SDS?and cetyl trimethyl ammonium bromide?CTAB?.The morphology,structure and optical properties of synthesized productions have been characterized by X-ray diffraction,ultraviolet-visible spectrophotometer,SEM and TEM,which shown the as-obtained PbS were spherical crystal in homogeneous size.The formation mechanism of spherical PbS nanocrystals have been discussed,it indicated that the spherical PbS nanoparticles were grown with the coefficient impact of alkyl chain template and micro soft template micelles from surfactant when the experiment were taken at room temperature.2.Iron sulfide nanoparticles were one step synthesized by using solvothermal method,and the ferric nitrate hydrate nine [Fe?NO₃?₃·9H₂O] acted as the source of iron,the l-cysteine was the source of sulfur,the deionized water and ethanolamine were reaction solvent.The ethanolamine played an important role as a catalytic in reaction process,So,we successfully synthesized iron sulfide nanoparticles with different morphology and structure by changing the volume ratio of ethanolamine and deionized water,the products were characterized by XRD and SEM,moreover,the mechanism of the growth has been discussed.