Zinc sulfide is an important direct band gap semiconductor material, and mainly exist in sphalerite and wurtzite form. The band gap of the sphalerite and wurtzite is 3.54 eV,3.71 eV respectively. Zinc sulfide is one of the center subjects due to its unique optical and electrical properties. Zinc sulfide semiconductor material are widely used in electric,photoluminescence, sensors, photocatalysis field. The rapid development of the global industry brings about the development of economic, but the environmental problems. The control of environmental pollution is a key and difficult problem.The semiconductor using sunlight to government environment is the way that kill two birds with one stone, and becomes a research hotspot now.The mainly preparation method of zinc sulfide are micro emulsion assisted synthesis method, solid phase method, magnetron sputtering, polymer template method, reverse micelle method, and hydrothermal method.The advantages of hnydrothermal method are simple preparation process, preparation of adjustable grain, good crystallization and so on.In this paper,we used the simple hydrothermal method to prepare ZnS, Ni-ZnS, Co-ZnS,Mn-ZnS, nanoparticles, and studied the formation, morphology, photocatalytic properties and mechanism of this nanoparticles. The main contents of the article are as follows:(1) Zinc sulfide nanoparticles were prepared by low temperature hydrothermal method with Zn(NO3)2·6H2O and Na2S·9H2O as raw materials. We doped a certain amount of Ni2+ in zinc sulfide crystal type to improve the photocatalytic properties of zinc sulfide. Study the effect of Ni2+ on the crystal structure, morphology and photocatalytic performance of Ni-ZnS, and change the doped amount of Ni2+ to investigate the catalytic properties of the ZnS. The catalytic performance increased at first and then decreased with the increase of the doped amount of Ni2+. Ni-ZnS photocatalytic performance was the best when the doped amount of Ni2+ was 10%.(2) We doped a certain amount of transition metal ions in zinc sulfide crystal type to improve the photocatalytic properties of zinc sulfide, take Co2+,Mn2+ for instance. Study the influence of transition metal ions in zinc sulfide crystal type, morphology andphotocatalytic properties. The experimental results show that transition metal ions doping did not change crystal of zinc sulfide, reduce the width of forbidden band of zinc sulfide,improve the photocatalytic performance.(3) Zinc sulfide nanoparticles were prepared by low temperature hydrothermal method take SC(NH2)2 as sulfur source.The formation mechanism of zinc sulfide are discussed. The experimental results show that ZnO was generated at first,then Sulfur elements instead the oxygen generating zinc sulfide in the zinc oxidenetic. The crystalline of the sample is better then ZnS prepared take Na2S·9H2O as raw materials. Nanoparticle size are about 10 nm,particle size increased with the extension of hydrothermal time.Photocatalytic performance results show that ZnS with eight hours hydrothermal has the optimal performance in photocatalytic degradation of methylene blue. |