硫化物納米復(fù)合材料的合成及其光催化性質(zhì)研究
[Abstract]:Metal sulfide nanomaterials have attracted wide attention in battery, sensor, photocatalysis and other fields because of their unique physical and chemical properties. However, the single-component nanomaterials are limited in various applications and can not meet the requirements of a wide range of applications. Researchers optimize the properties of nanomaterials by combining two or more nanomaterials. And achieved certain results. The composition and morphology of nanomaterials play an important role in the properties, so the synthesis of nanomaterials has become one of the important tasks in the study of nanomaterials. The solvothermal method is the most common method for the synthesis of nanomaterials. In recent ten years, colloidal synthesis of metal sulfide nanomaterials has shown a good development trend. In this paper, several kinds of sulfide nanocomposites were synthesized under mild conditions with oleamine, oleic acid and n-dodecanethanol as solvents by colloidal synthesis, and their photocatalytic properties were studied. The main contents of this paper are as follows: 1. One-step synthesis of graphene Co3S4 supported Ag2S nanocomposites and their photocatalytic properties; using oleamine and n-dodecanediol as solvents, silver diethyldithiocarbamate (S2CNEt2) was used. With Co (NO3) 2 6H2O as reactant, graphene C03S4 supported Ag2S nanocomposites were prepared by thermal decomposition in oleamine and dodecanethanol solution. Compared with the methods reported in previous literatures, the method of seed growth is simpler than the catalytic method. X-ray diffractometer (XRD), transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM),) are used. The products were characterized by UV-Vis spectrophotometer (UV-Vis) and the prepared samples showed good catalytic activity in the degradation of methylene blue and methyl orange under visible light. Stability and reusability. At the same time, we also discussed the photocatalytic mechanism of graphene C03S4 supported Ag2S nanocomposites. 2. Preparation and photocatalytic Properties of Au/Cu1.94S/ZnS Nanocomposites the nanometer Cu1.94S/ZnS nanocomposites were prepared by colloidal synthesis using oleamine as solvent CuI and zinc diethyldithiocarbamate [Zn (S2CNEt2) 2] as raw materials. Au/Cui.94S/ZnS ternary nanocomposites were prepared by loading Au nanoparticles. (XRD), transmission electron microscope (TEM),) was used for X-ray diffraction. The products were characterized by UV-Vis spectrophotometer (UV-Vis), and the photocatalytic degradation of dye RhB by Au/Cui.94S/ZnS nanocomposites was investigated. The results showed that Au/Cui.94S/ZnS nanocomposites had excellent photocatalytic degradation and the photocatalytic mechanism of Au/Cu1.94S/ZnS nanocomposites was also discussed. Synthesis and photocatalytic Properties of Ag2S/ZnS Nanocomposites; using oleamine, n-dodecanediol, oleic acid mixture as solvent, silver diethyldithiocarbamate (S2CNEt2) and zinc diethyldithiocarbamate (S2CNEt2) _ 2 as reactants, and silver diethyldithiocarbamate (S2CNEt2) and zinc diethyldithiocarbamate (S2CNEt2) _ 2 as reactants. The nanocomposites of Ag2S/ZnS were synthesized by thermal decomposition. The products were characterized by (xRD), transmission electron microscope (xRD), (TEM), UV-Vis spectrophotometer (UV-Vis) and so on. During the experiment, we found that the solvent has an important effect on the morphology of the product. In addition, we have also studied the photocatalytic degradation of Rhodamine B solution by Ag2S/ZnS nanocomposites under visible light. The results show that our nanocomposites have good catalytic activity. The photocatalytic mechanism of Ag2S/ZnS nanocomposites was also discussed.
【學位授予單位】:安徽大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TB383.1;TB33
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