中文摘要：

采用溶胶-凝胶法合成ZnO量子点,研究了原料LiO H·H2O和Zn（C4H6O4）·2H2O的摩尔比、聚乙二醇（PEG2000）掺杂量、pH等因素对光催化降解垃圾渗滤液的影响,并通过场发射高分辨率透射电镜（HRTEM）、X射线衍射仪、X射线光电子能谱仪、荧光光谱等表征手段对其成分、形貌及晶体结构进行表征分析。结果表明,制备的掺杂质量分数为6%的PEG ZnO量子点材料粒径为5.9 nm,适宜原料摩尔比为5：1,PEG 2000适宜掺杂质量分数为6%,适宜pH为4。光催化降解垃圾渗滤液2 h,色度和COD的去除率分别为77.74%和70.53%。证明该光催化材料具有较强的光催化性能与应用前景。

英文摘要：

In this study, the ZnO quantum dots was prepared by organic liquid-phase reaction. The effects of material, the feed ration of LiOHoH20 to Zn （C4H6O4）,2H2O3 doping amount of polyethylene glycol （PEG 2000）, catalyst content and pH on the photocatalytic degradation of landfill leachate were studied. TEM, XRD and XPS were used to characterize the composition, morphology and crystal structure of the ZnO quantum dots .The results show that, the diameter of ZnO quantum dots doping mass fraction of 6% PEG was 5.9 nm, the optimum proportion was 5：1, the doping optimum of PEG was 6%, the optimum pH was 4. After 2 h photoeatalytic reaction of landfill leachate, the decolourization ratio was 77.74%, the degradation ratio of COD was 70.53%. Indicating that this photocatalytic properties had good photocatalytic effects and application prospect.