An eco-friendly, economical, and stable heterojunction composite phosphorus-doped graphite carbon nitride (P-g-CN)/FeVO-X was synthesized by one-pot impregnation precipitation, and its physical and photoelectric properties were characterized, P-g-CN/FeVO-400 demonstrated the best performance. The synergistic effect of P-g-CN and FeVO promotes the prolongation of the photogenerated carrier lifetime while improving the electron-hole separation efficiency. The optimal reaction conditions were obtained by varying initial pH, hydrogen peroxide concentration, catalyst dosage, and tetracycline concentration. Meanwhile, tetracycline degradation was also investigated in complex systems with different anions and cations. The generation of hydrogen peroxide in the reaction process was determined by investigating the changes in hydrogen peroxide content, and its generation mechanism was explored. The results of 5 cycles show that the catalyst has good stability. The results of free radical trapping experiments and electron paramagnetic resonance spectroscopy indicate that the main reactive species in the reaction process are superoxide radicals. Therefore, the possible mechanism of tetracycline degradation by P-g-CN/FeVO-400 was proposed alongside an analysis of the degradation pathway. The study provides a promising and effective way to develop high-performance type-II photocatalysts and paves the way for their practical application in wastewater treatment processes.

中文翻译：

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具有强大光响应能力的 Pg-C3N4/FeVO4 异质结构在去除四环素方面表现出显着的效率

采用一锅浸渍沉淀法合成了一种环保、经济、稳定的异质结复合磷掺杂石墨氮化碳（Pg-CN）/FeVO-X，并对其物理和光电性能进行了表征。 400表现出了最好的性能。 Pg-CN和FeVO的协同作用促进了光生载流子寿命的延长，同时提高了电子空穴分离效率。通过改变初始pH、过氧化氢浓度、催化剂用量和四环素浓度获得最佳反应条件。同时，还研究了具有不同阴离子和阳离子的复杂体系中的四环素降解。通过考察过氧化氢含量的变化来确定反应过程中过氧化氢的生成情况，并探讨其生成机理。 5次循环结果表明催化剂具有良好的稳定性。自由基捕获实验和电子顺磁共振波谱结果表明，反应过程中的主要反应物种是超氧自由基。因此，在分析降解途径的同时，提出了 Pg-CN/FeVO-400 降解四环素的可能机制。该研究为开发高性能II型光催化剂提供了一种有前途且有效的方法，并为其在废水处理过程中的实际应用铺平了道路。