随着工业化的快速发展，全氟辛酸（PFOA）在工业中被广泛使用，同时PFOA具有难降解、易迁移和高毒性等特点，其降解已经引起了研究学者的广泛关注。光催化降解是最环保，高效的降解方式之一，因此研究新型催化剂对PFOA的光催化降解效果有一定的必要性。本工作主要研究了常温条件下催化剂在254 nm的紫外光照下对PFOA光催化降解效率。研究表明：（1）反应的最佳催化剂是铅掺杂铁酸铋/石墨烯复合纳米材料(PBG)，降解率达到34.0%。（2）PFOA初始浓度越高，PBG对PFOA的光催化降解率和速率越低，PBG对初始浓度为20 mg/L PFOA光催化降解的速率分别是初始浓度为50和80 mg/L PFOA光催化降解速率的3和4倍。（3）催化剂初始浓度越高，对PFOA的降解率和反应速率越低，使300 mg/L催化剂对PFOA的半衰期是100和200 mg/L催化剂对PFOA的半衰期的2倍。（4）酸性条件促进PBG对PFOA的光催化降解，碱性条件抑制降解，在初始pH为2的条件下PBG对PFOA的降解率达到了46.8%，比pH为4的条件下提高了一倍。（5）在无氧条件下PBG对PFOA的降解率比相同条件下曝空气的降解率提高11.0%，表明PBG光催化降解PFOA为还原反应。

With the rapid development of industrialization, perfluorooctanoic acid (PFOA) is widely used in industry. And as the PFOA has the characteristics of difficult degradation, easy migration and high toxicity, its degradation has attracted the attention of researchers. Because photocatalytic degradation is one of the most environmentally friendly and efficient degradation methods, it is necessary to study the photocatalytic degradation effect of PFOA. Herein, the photocatalytic degradation efficiency of PFOA under UV irradiation at 254 nm and normal temperature was studied. The results show that: (1) the best catalyst is lead-doped bismuth/graphene composite nanomaterials (PBG), and the degradation rate is 34.0%. (2) The rate and speed of photocatalytic degradation of PBG to PFOA is negative to the initial concentration of PFOA, and the photocatalytic degradation of PBG to PFOA in the initial concentration of 20 mg/L was 3 times or 4 times than that in the initial concentration of 50 or 80 mg/L, respectively. (3) The higher initial concentration of the catalyst, the lower degradation rate and reaction rate of PFOA, and the PFOA half-life under the concentration of 300 mg/L catalyst is twice than that under the concentration of 100 and 200 mg/L catalyst. (4) Acidic conditions promoted the photocatalytic degradation of PFOA by PBG, and the degradation rate of PBG to PFOA reached 46.8% under the condition that the initial pH is 2, which was twice as high as that of pH 4. (5) Under the condition of anaerobic condition, the degradation rate of PFOA was 11.0% higher than in the air, showing that photocatalytic degradation reaction of PBG to PFOA is a reduction reaction .