【摘要】 异质结的构建是提高光催化剂性能的有效途径．通过两步法，以BiOCl为基底原位生长CdSe纳米颗粒成功制备了一系列BiOCl/CdSe复合材料．利用XRD、SEM、TEM等对材料进行表征，结果证明CdSe在BiOCl表面均匀分布，并且BiOCl与CdSe之间成功构建了有效的异质结．在可见光照射下，与纯BiOCl和CdSe相比，复合材料在光催化降解四环素方面表现出优异的性能．其中，BC-1在1 h内可有效降解81.7%的四环素．更重要的是，通过循环套用证明，该复合材料重复使用4次后仍有较高的稳定性．自由基捕获实验证明，空穴（h⁺）和超氧自由基（·O₂^-）在降解过程中起着主要作用．更多还原

【Abstract】 The construction of a heterojunction is an effective strategy to improve the performance of photocatalysts.A series of BiOCl/CdSe composites were successfully prepared by using BiOCl as a substrate for the in situ growth of Cd Se nanoparticles in a two-step process. The composites were characterized via XRD,SEM,and TEM. The results showed that CdSe was evenly distributed on the BiOCl surface along with an effective heterojunction between BiOCl and Cd Se. Compared with pure Bi OCl and Cd Se,the composites exhibited excellent photocatalytic degradation of tetracycline under visible-light irradiation. Among them,BC-1 effectively degraded 81.7% of tetracycline within 1 h.More importantly,the composite was proved to exhibit a high stability after four cycles. Free radical capture experiments showed that holes（h⁺） and superoxide radicals（·O₂^-）played an important role in the degradation process.更多还原