采用单宁酸（TA）改性BiOCl（BOC），一步水热法制备新型复合材料TA/BOC。通过XRD、SEM、XPS、FT-IR、UV-Vis DRS和荧光光谱（PL）等技术对复合材料的形貌、结构和吸光性能进行表征。以罗丹明B（RhB）为目标降解物，考察了TA/BOC的可见光催化降解活性和重复使用性。结果表明，复合材料的可见光催化活性均高于纯BOC，其中TA/BOC-0.08的催化活性最优。最佳条件下，TA/BOC在30 min内催化降解RhB的降解率达95%以上；重复使用5次，催化性能无明显衰减。TA/BOC通过光敏化作用实现对RhB的高效率可见光降解，其中·O₂^-是可见光敏化催化降解的主要活性物种。

TA/BOC,a new composite material,is prepared by one-step hydrothermal method from tannic acid (TA) and BiOCl (BOC).The morphology,structure and light absorption of the composite are characterized by XRD,SEM,XPS,FT-IR,UV-Vis DRS and fluorescence spectrum (PL).Photocatalytic activity and reusability of TA/BOC are investigated by using Rhodamine B as degradation target.Results show that the visible light catalytic activity of the composite material is higher than that of pure BOC,and the catalytic activity of 0.08-TA/BOC is the best.Under the optimal conditions,the degradation of RhB can exceed 95% over TA/BOC within 30 minutes.It can be reused for 5 times without significant reduction of catalytic performance.TA/BOC achieves high-efficiency visible light degradation of RhB through photosensitization,of which ·O₂^- is the main active specie.

汪山(1993-),男,硕士研究生,研究方向为纳米环境功能材料,651460024@qq.com