Photocatalytic technology can solve various environmental pollution problems, especially antibiotic pollution. A novel La-doped MIL-53(Al)/ZnO composite material was successfully synthesized by a combination of hydrothermal method and calcination, showing high photocatalytic degradation percent of sulfamethazine (SMT). The 2 mol% La MIL-53(Al)/ZnO photocatalyst shows the highest degradation efficiency toward SMT (92%) within 120 min, which is 4.1 times higher than pure ZnO (increased from 18% to 92%). In addition, the degradation analysis of SMT by high performance liquid chromatography proves that the products are CO₂ and H₂O. The improved photocatalytic activity is mostly caused by the following factors. (1) Doping La ions can decrease the band gap of ZnO, enhance light response, and effectively enhance the separation rate of photo-generated holes and electrons. (2) MIL-53(Al) can adsorb SMT and promote the separation of electron. This work shows that the synthesized La-doped MIL-53(Al)/ZnO photocatalyst is expected to be used as a green and effective method for treatment of environment water pollution.

光催化技术可以解决各种环境污染问题，尤其是抗生素污染。采用水热法和煅烧相结合的方法，成功合成了一种新型的La掺杂MIL-53(Al)/ZnO复合材料，显示出较高的磺胺二甲嘧啶(SMT)光催化降解率。2 mol% La MIL-53(Al)/ZnO 光催化剂在 120 分钟内对 SMT 的降解效率最高（92%），是纯 ZnO 的 4.1 倍（从 18% 增加到 92%）。此外，高效液相色谱对SMT的降解分析证明产物为CO ₂和H ₂O. 光催化活性的提高主要是由以下因素引起的。(1)掺杂La离子可以减小ZnO的带隙，增强光响应，有效提高光生空穴和电子的分离率。(2) MIL-53(Al)可以吸附SMT，促进电子分离。该工作表明，合成的La掺杂MIL-53(Al)/ZnO光催化剂有望成为一种绿色有效的环境水污染治理方法。