采用"两步溶剂热"法制备PVDF/BiOBr复合光催化剂，通过XRD、SEM、TEM、XPS和UV-Vis DRS等对催化剂进行表征，并在模拟太阳光条件下研究复合催化剂对罗丹明B（RhB）的光催化降解性能。结果表明，PVDF/BiOBr复合光催化剂的活性明显高于BiOBr，当PVDF掺杂量为1%（质量分数）时，可达到99%的最佳降解效果。机理研究表明，PVDF的修饰可促进BiOBr单线态氧（¹O₂）的产生，从而提高光降解能力。多次重复实验结果表明，复合催化剂的光催化性能并无明显减弱，稳定性较好。

PVDF/BiOBr composite photocatalyst is prepared through two-step solvothermal method and characterized by means of XRD, SEM, TEM, XPS and UV-Vis DRS tests.The photocatalytic degradation performance of the catalyst to rhodamine B is evaluated under simulated sunlight conditions.Results show that the activity of PVDF/BiOBr composite photocatalyst is significantly higher than that of BiOBr.The degradation effect of rhodamine B can achieve the best of 99% over the catalyst with a PVDF doping amount of 1% (mass fraction).Study on the mechanism indicates that the modification of BiOBr by PVDF promotes the generation of singlet oxygen (¹O₂), thereby improving the photodegradability.The results from repeated experiments show that the photocatalytic performance of PVDF/BiOBr has not significantly been weakened after repeated use, indicating a good stability.

李心(1989-),男,硕士生,研究方向为环境保护与生态修复,1805438596@qq.com