The rapid and efficient degradation of polycyclic aromatic hydrocarbon (PAH) derivatives with toxicological properties remains a substantial challenge. In this study, a cost-effective and eco-friendly catalyst, nano-MoO₂ (0.05 g L⁻¹), exhibited excellent performance in activating 4.0 mmol L⁻¹ peroxymonosulfate (PMS) for the degradation of naphthalene derivatives with 1 mg L⁻¹ in aqueous systems; these derivatives include 1-methylnaphthalene, 1-nitronaphthalene, 1-chloronaphthalene, 1-naphthylamine and 1-naphthol, with high degradation rates of 87.52%, 86.23%, 97.87%, 99.74%, and 77.16%. Nano-MoO₂ acts as an electron donor by transferring an electron causing O-O bond of PMS to cleave producing SO₄^·−, and later ^·OH. Electron paramagnetic resonance (EPR) analysis combined with free radical quenching research indicated that SO₄^·− and ^·OH dominated the degradation of naphthalene derivatives, and O₂^·− and ¹O₂ participated in the processes. X-ray photoelectron spectroscopy (XPS) revealed the transformation of Mo(IV) to Mo(V) and Mo(VI), which suggested that the activation process proceeded via electron transfer from nano-MoO₂ to PMS. The applicability of the nano-MoO₂/PMS system in influencing parameters and stability was explored. The degradation pathways were primarily elucidated for each naphthalene derivative based on the intermediates identified in the systems. The -CH₃, -NO₂, -Cl, -OH substituents increased the positive electrostatic potential (ESP) on the molecular surface of 1-methylnaphthalene, 1-nitronaphthalene, 1-chloronaphthalene, and 1-naphthol, which reduced the electrophilic reaction and electron transfer between the reactive species and pollutants, leading to a lower degradation rate of naphthalene derivatives than the parent compound. However, the effect of -NH₂ substituents is the opposite. These findings suggest that nano-MoO₂ may aid as a novel catalyst in the future remediation of environments polluted with PAH derivatives.

具有毒理学性质的多环芳烃（PAH）衍生物的快速有效降解仍然是一个巨大的挑战。在这项研究中，一种经济高效且环保的催化剂，纳米MoO ₂（0.05 g L ^-1），在活化4.0 mmol L ^-1过氧一硫酸盐（PMS）降解1 mg L萘衍生物方面表现出出色的性能。^-1在水性体系中；这些衍生物包括1-甲基萘，1-硝基萘，1-氯萘，1-萘胺和1-萘酚，其高降解率分别为87.52％，86.23％，97.87％，99.74％和77.16％。纳米MoO ₂通过转移电子使PMS的OO键裂解产生SO充当电子供体₄ ^{· −}和更高版本^· OH。电子顺磁共振（EPR）分析和自由基猝灭研究相结合表明，SO ₄ ^{· -}和^· OH主导了萘衍生物的降解，O ₂ ^{· -}和¹ O ₂参与了该过程。X射线光电子能谱（XPS）揭示了Mo（IV）向Mo（V）和Mo（VI）的转化，这表明激活过程是通过电子从纳米MoO ₂转移到PMS进行的。纳米MoO ₂的适用性探索了/ PMS系统对参数和稳定性的影响。根据系统中鉴定的中间体，首先阐明了每种萘衍生物的降解途径。-CH ₃，-NO ₂，-Cl，-OH取代基增加了1-甲基萘，1-硝基萘，1-氯萘和1-萘酚的分子表面上的正静电势（ESP），从而降低了亲电反应以及反应性物质和污染物之间的电子转移，导致萘衍生物的降解率低于母体化合物。但是，-NH ₂取代基的作用相反。这些发现表明，纳米MoO ₂ 可能在将来修复被PAH衍生物污染的环境方面作为一种新型催化剂。