The interface coupling between solid electronic medium and semiconductor with good electrical conductivity can promote the separation of photoinduced electron-hole pair and improve the activity of photocatalyst. Polyaniline/Bi₂O₂CO₃ with different proportions was synthesized by simple hydrothermal method under the strong interfacial coupling between polyaniline and Bi₂O₂CO₃. XRD, XPS and FT-IR techniques were used to confirm the successful synthesis of the composite materials. With the help of SEM and TEM techniques, the morphology and structure of the materials were understood, and the photocatalytic properties of the composite materials were determined by UV–Vis, PL and other techniques. The photocatalytic activity of the synthesized photocatalyst was evaluated by degradation of tetracycline, and the effects of sample dose, pH, anion and other factors on the photocatalytic process were explored. The intermediates during the reaction were determined by liquid chromatography mass spectrometry (LC-MS), and five degradation pathways were deduced. Toxicity Estimation Software Tool and Ecosar software were used to test the toxicity of intermediate products, which further illustrated the green safety of photocatalytic technology. We also propose a possible photocatalytic reaction mechanism based on the band structure of the material and the reactive radicals generated during the reaction.

固体电子介质与导电性良好的半导体之间的界面耦合可以促进光生电子-空穴对的分离，提高光催化剂的活性。在聚苯胺与Bi ₂ O ₂ CO ₃强界面耦合作用下，采用简单的水热法合成了不同配比的聚苯胺/Bi ₂ O ₂ CO _{3 。}. XRD、XPS 和 FT-IR 技术用于确认复合材料的成功合成。借助SEM和TEM技术，了解了材料的形貌和结构，并通过UV-Vis、PL等技术测定了复合材料的光催化性能。通过降解四环素评价合成光催化剂的光催化活性，探讨样品剂量、pH、阴离子等因素对光催化过程的影响。通过液相色谱质谱法（LC-MS）测定反应过程中的中间体，并推导出五种降解途径。毒性评估软件工具和Ecosar软件用于测试中间产物的毒性，进一步说明了光催化技术的绿色安全性。我们还根据材料的能带结构和反应过程中产生的活性自由基提出了一种可能的光催化反应机理。