Bismuth oxybromide/molybdenum disulfide/graphene oxide (BiOBr/MoS₂/GO) heterojunction composites were fabricated to modulate the adsorption ability and photocatalytic degradation performance toward oxytetracycline (OTC). The flowerlike BiOBr/MoS₂/GO composites demonstrated excellent photocatalytic activies for the OTC degradation. Specifically, OTC, tetracycline, chlorotetracycline, and doxycycline were simultaneously removed with degradation rates higher than 98% under visible light irradiation within 40 min. Radical trapping experiments indicated that photogenerated holes (h⁺), hydroxyl radicals (OH), and superoxide radicals (O²⁻) played crucial roles in photocatalytic OTC degradation. Further, Possible transformation pathway and photocatalytic mechanism were proposed by investigating the intermediates in OTC degradation process.

制备了溴氧化铋/二硫化钼/氧化石墨烯（BiOBr / MoS ₂ / GO）异质结复合材料，以调节对土霉素的吸附能力和光催化降解性能。花状BiOBr / MoS ₂ / GO复合材料表现出出色的OTC降解光催化活性。具体而言，在40分钟内可见光照射下，OTC，四环素，氯四环素和强力霉素同时被去除，降解率高于98％。自由基捕获实验表明，光生空穴（h ⁺），羟基自由基（OH）和超氧化物自由基（O ²⁻）在光催化OTC降解中起关键作用。通过研究OTC降解过程中的中间体，提出了可能的转化途径和光催化机理。