通过溶胶-凝胶法制备氟氧钛（TiOF2）花状纳米球，采用X射线粉末衍射仪（XRD）、扫描电子显微镜（SEM）、傅里叶红外光谱分析仪（FT-IR）和固体紫外漫反射仪（UV-Vis DRS）等手段对TiOF2花状纳米球进行表征分析，并通过实验探究了不同条件下TiOF2对甲基橙染料废水的光催化降解性能。在300 W氙灯模拟太阳光照射2.5 h条件下，质量浓度0.5 g/L TiOF2光催化剂对初始质量浓度20 mg/L、pH呈中性、体积为100 mL的甲基橙染料废水在20 ℃反应条件下降解效果最佳，催化降解率可达97.3%。此结果说明所制备的TiOF2光催化剂对甲基橙染料废水具有良好的光催化活性。Abstract：We have successfully synthesized flower-shaped TiOF2 nanospheres via a sol-gel method. The samples were characterized by XRD, SEM, FT-IR and UV-vis DRS spectroscopy. In addition, the photocatalytic properties of TiOF2 flower-shaped nanospheres were studied using the degradation of methyl orange (MO) under different conditions. The results show that when 0.5 g/L of TiOF2 flower-shaped nanospheres was added to 100 mL of solution with 20 mg/L of neutral MO at room temperature, the degradation ratio reached 97.3% after 2.5 hours when irradiating under a 300 W xenon lamp. The results show that as-prepared TiOF2 flower-shaped nanospheres have outstanding catalytic activity in the photocatalytic degradation of MO dye wastewater under sunlight.