通过水热法制备出一系列Z型异质结Cu₂O/Bi₂MoO₆新型光催化剂。采用扫描电子显微镜、粉末X射线衍射、红外光谱、紫外可见吸收光谱等表征手段研究了催化剂的形貌、结构性质和光电化学性质，并以四环素(TC)为降解目标污染物，进一步探究了其催化效率。实验结果表明，Cu₂O的加入提高了复合催化剂的光催化性能，其中20% Cu₂O/Bi₂MoO₆复合催化剂(Cu₂O和Bi₂MoO₆的质量比为20%)降解效果最好，100 min内可降解95%的TC。Cu₂O与Bi₂MoO₆之间的协同作用使其可以吸收更多的可见光，所构建的Z型异质结改变了电子转移途径，提高了电子与空穴的分离效率，光催化活性显著提高。通过自由基捕获实验和能带结构，分析了Z型异质结Cu₂O/Bi₂MoO₆复合催化剂光催化降解TC可能的机理。

The Z-scheme heterojunction Cu₂O/Bi₂CrO₆ photocatalyst was successfully prepared by introducing Cu₂O on the Bi₂CrO₆ surface using a coprecipitation method. The photocatalytic degradation of tetracycline (TC) on Cu₂O/Bi₂CrO₆ under visible light irradiation was investigated. It was found that the Cu₂O/Bi₂CrO₆ photocatalyst had the best photocatalytic activity when the mass ratio of Cu₂O to Bi₂CrO₆ was 20%, and the TC could be degraded by 87.5% within 100 min, which was about 1.8 times and 1.3 times higher than that of pure Bi₂CrO₆ and pure Cu₂O, respectively. Besides, the Cu₂O/Bi₂CrO₆ photocatalyst also showed good stability and reusability. The Z scheme heterojunction structure of Cu₂O/Bi₂CrO₆ provided increased active sites, enhanced interfacial charge separation, and improved separation efficiency of photogenerated electro-hole (e^--h⁺) pairs, leading to enhanced photocatalytic properties. Electron paramagnetic resonance (EPR) measurement confirmed that the superoxide radical (·O₂^-), hydroxyl radical (·OH), and h⁺ were the primary active species during photocatalysis.