Zinc acetate is used as a raw material to synthesize the desired ZnO in hot solvent by controlling the amount of citric acid (CA) added. Notably, the amount of CA added has a significant relationship with the control of the morphology of ZnO. Spherical ZnO wrapped in nanosheets is synthesized through the secondary crystallization of Zn²⁺. The optical properties of the ZnO sample are tested through the degradation of organic pollutants. Notably, the photocatalytic properties of ZnO vary with the different amounts of CA added. Exposure of the active crystal face increases the photocatalytic activity of ZnO. In addition, the number of defects on the surface of the ZnO sample increases because of its large specific surface area, thus changing the bandgap of ZnO. Therefore, the resulting sample can respond under visible light.

乙酸锌用作原料，通过控制添加的柠檬酸（CA）的量，在热溶剂中合成所需的ZnO。值得注意的是，添加的CA的数量与ZnO形态的控制有着显着的关系。通过Zn ²⁺的二次结晶合成包裹在纳米片中的球形ZnO。。ZnO样品的光学特性通过有机污染物的降解来测试。值得注意的是，ZnO的光催化性能随添加的CA量的不同而变化。活性晶体面的暴露增加了ZnO的光催化活性。另外，由于ZnO样品的比表面积大，因此其表面上的缺陷数量增加，从而改变了ZnO的带隙。因此，所得样品可以在可​​见光下响应。