ZnS复合纳米线制备表征及其光催化性质研究

Preparation and optical properties of ZnS composite nanowires

对ZnS材料进行形貌和结构的表征,运用超声水热法进行分析研究.ZnS纳米材料的合成需要控制低温条件,再加入Ag、Ce金属元素的负载制备成ZnS复合纳米线.因其自身的光催化活性的不足,采用加入一定量的Ag和Ce等金属元素,加强自身的光催化活性,从而降低光生电子-空穴复合的几率,使其电子向金属Ag和Ce迁移,提高ZnS光催化剂的活性.本文采用X射线衍射、电子扫描电镜、电子能谱和透射电镜分析的表征方法,对纳米银铈硫化锌复合材料进行分析和讨论,并扩展掺杂ZnS纳米材料制备方法及其应用领域的发展.在已知样品浓度相同的情况下,利用光催化法检测分散后的样本,从中可知光催化效果最强的是双掺杂样品.光催化抗菌能力最强的是用最小抑菌浓度检测出双掺杂且用聚丙烯酸钠(PAAS)分散的样品.

In recent years,doped ZnS semiconductor nanomaterials have attracted much attention in the field of new luminescent materials. In this paper,the morphology and structure of ZnS nanomaterials have been characterized by the ultrasonic hydrothermal method. The synthesis of ZnS nanomaterials requires the control of low temperature conditions,and then the loading of Ag and Ce metal elements is added to prepare ZnS composite nanowires. Due to the deficiency of its own photocatalytic activity,some metal elements such as Ag and Ce are added to enhance its own photocatalytic activity,which can reduce the probability of photogenerated electron-hole recombination,make its electrons migrate to metal Ag and Ce,and improve the activity of ZnS photocatalyst. The characterization methods of X-ray diffraction,electron scanning electron microscopy,electron spectroscopy and transmission electron microscopy analysis are used to analyze the nano-silver cerium zinc sulfide composites,and to improve the preparation method and the application field of doped ZnS nanomaterials. When the known sample concentration is the same,the dispersed sample is detected by the photocatalytic method,which reveals that the double doped sample has the strongest photocatalytic effect. The strongest photocatalytic antibacterial ability is the detection of double-doped samples dispersed with sodium polyacrylate(PAAS) and with the minimum inhibitory concentration.