Deoxynivalenol (DON) is a serious threat to water environment. In this work, the protonated g-C₃N₄/oxygen-doped g-C₃N₄ (CNH/OCN) simply prepared by the electrostatic assembling method was firstly used for the photodegradation of DON in water environment under the visible light irradiation. The results showed that the DON degradation rate of CNH/OCN-50 could reached 86.6% after 150 min of visible light irradiation. The reaction rate constant of CNH/OCN-50 was 0.79146 min⁻¹, which was 1.13 times that of OCN, 1.50 times that of CNH, 3.24 times that of g-C₃N₄, 2.25 times that of ZnO, 1.94 times that of α-Fe₂O₃ and 5.15 times that of TiO₂. The reason for the enhanced photocatalytic performance of CNH/OCN composites could be that a homojunction was formed in the CNH/OCN composites, which promoted the separation efficiency of photogenerated electron-hole pairs. Two intermediates of DON degradation, and it was preliminarily inferred that their toxicity was lower than DON. This work provides new insights into the degradation of DON.

脱氧雪腐镰刀菌烯醇（DON）是对水环境的严重威胁。在这项工作中，首次将通过静电组装方法简单制备的质子化gC ₃ N ₄ /氧掺杂gC ₃ N ₄ (CNH/OCN)用于可见光照射下水环境中DON的光降解。结果表明，可见光照射150 min后，CNH/OCN-50的DON降解率可达86.6%。CNH/OCN-50的反应速率常数为0.79146 min ^-1，是OCN的1.13倍，CNH的1.50倍，gC ₃ N _{4 的}3.24倍，ZnO的2.25倍，α的1.94倍-Fe ₂ O ₃和 TiO _{2 的}5.15 倍。CNH/OCN复合材料光催化性能增强的原因可能是CNH/OCN复合材料中形成了同质结，提高了光生电子-空穴对的分离效率。DON降解的两种中间体，初步推断其毒性低于DON。这项工作为 DON 的降解提供了新的见解。