The intentional discharge of polycyclic aromatic hydrocarbons (PAHs) into the aquatic system from different industrial units has posed a serious threat to human health. To address the concerns associated with PAHs misuse, an efficient approach for developing affordable photocatalyst materials for PAHs degradation is much needed. In this study, we have explored co-precipitation and hydrothermal methods to synthesize Fe₃O₄/GO/g-C₃N₄ ternary composites and utilized them as photocatalyst materials for the degradation of naphthalene.

Fe₃O₄/GO/g-C₃N₄ nanocomposite demonstrated superior degradation performance, with 87.56% naphthalene degradation achieved in 140 min under visible light irradiation, far outperforming Fe₃O₄/GO (77.42%) and Fe₃O₄ (69.42%). The enhanced degradation of naphthalene by the Fe₃O₄/GO/g-C₃N₄ composite was credited to the effective charge carrier separation and increased visible-light absorption induced by GO and g-C₃N₄. The impact of operating parameters on the catalytic efficiency of the Fe₃O₄/GO/g-C₃N₄ catalyst was also examined. The findings of this study revealed that lower naphthalene concentration (10 mg/L), higher catalyst dosage (40 mg), and moderate pH conditions (pH 5 to pH 9) were favorable for photocatalytic activity. The degradation of naphthalene followed pseudo-first-order kinetics with a rate constant value of 0.0137 min⁻¹. The generation of radicals (^•OH and O₂^•−) liable for the degradation of naphthalene was corroborated through electron paramagnetic resonance analysis and quenching experiments. Furthermore, the Fe₃O₄/GO/g-C₃N₄ photocatalyst exhibited promising reusability in five consecutive cyclic runs, validating its excellent stability.

不同工业单位有意将多环芳烃 (PAHs) 排放到水生系统中，已对人类健康构成严重威胁。为了解决与 PAHs 滥用相关的问题，非常需要一种有效的方法来开发用于 PAHs 降解的负担得起的光催化剂材料。在本研究中，我们探索了共沉淀法和水热法合成 Fe ₃ O ₄ /GO/gC ₃ N ₄三元复合材料，并将其用作降解萘的光催化剂材料。

Fe ₃ O ₄ /GO/gC ₃ N ₄纳米复合材料表现出优异的降解性能，在可见光照射下140分钟内萘降解率为87.56%，远优于Fe ₃ O ₄ /GO（77.42% ）和Fe ₃ O ₄（69.42 %）。Fe ₃ O ₄ /GO/gC ₃ N _{4复合材料对萘的降解增强归功于有效的电荷载流子分离和由 GO 和 gC 3} N ₄引起的可见光吸收增加. 还检查了操作参数对Fe ₃ O ₄ /GO/gC ₃ N ₄催化剂的催化效率的影响。这项研究的结果表明，较低的萘浓度 (10 mg/L)、较高的催化剂用量 (40 mg) 和适度的 pH 条件 (pH 5 至 pH 9) 有利于光催化活性。萘的降解遵循准一级动力学，速率常数值为0.0137 min ^-1。通过电子顺磁共振分析和猝灭实验证实了易于降解萘的自由基（^• OH和O ₂ ^{•- ）的产生。}此外，Fe ₃O ₄ /GO/gC ₃ N ₄光催化剂在连续五次循环运行中表现出良好的可重复使用性，验证了其优异的稳定性。