<p>Pollutants such as nitrogen oxides (NO_x) are abundantly present in road-adjacent environments, posing significant threats to both ecosystems and human health. In recent years, photocatalytic technology has been recognized as an effective approach to addressing environmental pollution and the energy crisis. In this study, a coating composed of a composite photocatalyst made of carbon nanotubes (CNT) and zinc indium sulfide (ZnIn₂S₄) nanosheets was prepared by a one-step hydrothermal method. This study characterizes the structure and morphology of the CNT-ZnIn₂S₄ composite material and evaluates the wettability, wear resistance, and photocatalytic NO_x degradation performance of the coating. Experimental results demonstrate that the coating exhibits superior hydrophobicity, oleophobicity, and remarkable durability. Furthermore, it achieves notable NO and NO₂ degradation efficiencies of 64% and 95%, respectively, representing significant enhancements compared to conventional TiO₂ and pristine ZnIn₂S₄ photocatalysts. This enhancement can be attributed to the formation of a network structure between ZnIn₂S₄ nanosheets and CNTs, which effectively modulates the migration path of photogenerated electrons and suppresses charge carrier recombination. The developed coating offers advantages of facile fabrication and practical applicability, showing potential for implementation on building facades and transportation infrastructure adjacent to roadways. This work presents a novel material design strategy for effectively improving ambient air quality in urban environments.</p> Graphical Abstract <p></p>