分别采用水热和沉淀法制备ZnO光催化剂，利用X射线粉末衍射（XRD）和扫描电镜（SEM）对其物相和外貌进行分析观测．了解表征手段所反映的材料的物质结构信息。通过降解亚甲基蓝实验比较不同制备条件下所得ZnO的光催化性能。了解催化剂制备方法对其晶相、形貌及催化性能的影响。%The ZnO photocatalysts were prepared by hydrothermal and precipitation methods, and its phase and morphology were characterized by X-ray powder diffrac- tion （XRD） and scanning electron microscopy （SEM） to understand the material stru-ctural information reflected by XRD and SEM. Experiments were carried out using methylene blue as the pollutant object to evaluate and comparae with the photocataly- tic activity of ZnO catalysts to understand the influence of preparation methods for its crystal phase, morphology and catalytic properties.
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