| Metal sulfides are new type of inorganic semiconductor.It has been widely used in light catalysis,biological medicine,solar cells,and so on,due to its special characteristics and unique hollow structure.Manganese sulfide,as one of metal sulfide in the family of VllB-VIA,has strong reducing ability and higher quantum efficiency of photocatalysis,compared with other materials.In this paper,manganese sulfides with hollow nanostructure are simply synthesized using ethylene glycol as solvent and manganese acetate as manganese source.Sulfur source(L-cysteine)and solvent(ethylene glycol)both play a vital role in the whole growth process of products.The pure phase γ-MnS is obtained from the characterization of XRD,EDS,SEM and TEM.The results of VSM and PL Spectrometry indicate that the synthesized samples have characteristics of super paramagnetism and fluorescence.On the one hand,L-cysteine is used as sulfur source.When solvent is ethylene glycol,hollow microballs with 2 μm diameter has been obtained.When solvent is the compound of water and ethylene glycol(1:1),the sample becomes a cone-shaped rod grouped into flowers about 4-5 μm.When solvent is mixing of diethylene glycol and water(1:1),hexagonal hollow prism morphology is obtained.On the other hand,thioacetamide is used as the sulfur source.When solvent is ethylene glycol,1 μm hollow spherical structure has been received.When oleylamine is used as solvent,a monodisperse hexagonal flaky α-MnS,about 50 nm,is obtained.According to the quantum size effect,the change in grain will affect the movement of the UV-vis absorption peak and the width of bandgap.The samples prepared in this experiment are promising to be utilized in biomedicine,solar cells,short wavelength electronic devices,photocatalysis and other fields. |
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