亲油性硫化锰纳米微粒的化学制备和结构

Preparation and Study of the Structure of Surface-Modified MnS Nanoparticles

采用表面修饰的方法，在醇水体系中制备了双十八烷基二硫代磷酸（DDP）表面修饰的硫化锰（MnS）纳米微粒，用XPS、FTIR、TGA、TEM和HREM等技术对用表面修饰法得到的MnS纳米微粒的结构、化学稳定性和热稳定性进行研究，结果表明：表面修饰得到的MnS纳米微粒有较好的化学稳定性和热稳定性，并且微粒的分散件好、不团聚，制备出的MnS纳米晶核具有γ－MnS的晶型结构。

Surface-modified MnS nanoparticles were synthesized in mixed solvent of water-ethanol by the reaction of MnCl2·2H2O, Na2S·9H2O and surface modification agent dialkyldithiophosphate(DDP). The structure of surface-modified MnS nanoparticles was mvestigatedby XPS,FTIR,TGA, XRD, TEM and HREM. The results show that the DDP-capped MnS nanoparticle consists of a layer of DDP molecules and MnS nanoparticles core.THe diameterof DDP-capped MnS nanoparticles is 5~10 nm.The crystallmestructure of morganic MnS nanoparticle core is γ-MnS. Meanwhile,Surface-modified MnSnanoparticles have better chemical stability and thermostability.They are also well dispersed in organic solvents such as trichloromethane,benzene and in liquid paraffin.