Two novel conjugated organic polymers BTTh-1 and BTTh-2 were designed and synthesized. They were prepared by the reaction of two aldehyde units with melamine. Both aldehyde units were based on benzothiadiazole. The difference between the final aldehyde units was the introduction of thiophene groups in the BTTh-2 aldehyde monomer units. The difference between the two materials in the photocatalytic degradation of tetracycline was discussed in the context of the thiophene unit. The degradation efficiency of tetracycline by BTTh-2 (90.9%) was much higher than that of BTTh-1 (40.7%). The characterization results showed that BTTh-2 has a strong charge separation ability and fast transmission rate. After light excitation, the recombination ability of photogenerated holes and electrons becomes weak, and it has better utilization ability for visible light; the bandgap width is narrower.

设计并合成了两种新型的共轭有机聚合物BTTh-1和BTTh-2。它们是通过两个醛单元与三聚氰胺反应制备的。两个醛单元均基于苯并噻二唑。最终醛单元之间的差异是在BTTh-2醛单体单元中引入了噻吩基。在噻吩单元的背景下讨论了两种材料在四环素的光催化降解方面的差异。BTTh-2对四环素的降解效率（90.9％）远高于BTTh-1（40.7％）。表征结果表明，BTTh-2具有较强的电荷分离能力和较快的传输速率。光激发后，光生空穴和电子的复合能力变弱，对可见光具有更好的利用能力。