This　study　investigates　the　efficacy　of　graphitic　carbon　nitride　(g-C3N4)　as　a　photocatalyst　for　nitrogen　oxides　(NOx)　removal　and　air　purification　on　recycled　aggregate　pervious　concrete　(RAPC)　pavement　surfaces.　Three　gC3N4　variants　(CN-U,　CN-M1,　and　CN-M2),　synthesized　from　different　precursors　and　exhibiting　unique　structural　and　optical　properties,　were　evaluated　for　their　bonding　stability　on　RAPC　through　degradation　assessments,　specifically　examining　the　decomposition　of　rhodamine　B　(RhB)　dye　and　the　removal　rate　of　NOx　under　simulated　conditions　reflective　of　actual　road　environments.　The　study　emphasizes　the　importance　of　optimal　photocatalyst　loading　time,　identifying　6　h　post-substrate　casting　as　the　ideal　for　balancing　adhesion　strength　and　preventing　surface　slurry　leaking　issues.　After　pavement　surface　wear　and　high-temperature　rinsing　tests,　the　CNU　samples　coated　after　6　h　of　casting　showed　the　highest　NOx　removal　rates　of　23.8　%　and　24.6　%,　respectively.　Degradation　tests　revealed　minimal　g-C3N4　peeling　under　simulated　road　wear　but　significant　detachment　under　conditions　mimicking　summer　rainstorms　and　high　temperatures,　highlighting　environmental　challenges　to　longterm　air　purification　effectiveness　for　RAPC　pavement　loaded　with　g-C3N4.　Among　the　g-C3N4　variants,　CN-U　emerged　as　the　most　suitable　for　practical　road　applications,　considering　cost,　photocatalytic　efficiency,　and　bonding　stability,　with　CN-M1　as　a　viable　alternative.　In　contrast,　CN-M2　was　deemed　less　suitable　due　to　higher　costs　and　reduced　environmental　resilience.　This　research　offers　insights　into　developing　durable,　effective　photocatalytic　RAPC　pavement　materials　for　use　in　harsh　climatic　conditions,　advancing　functional　pavement　material　technology.