This　work　explored　an　effective　treatment　method　for　removing　NO　from　simulated　flue　gas　at　normal　temperature.　We　synthesized　accordion-like　MXene-derived　TiO2@C　coupled　with　g-C3N4　(TiO2@C/g-C3N4)　via　one-step　calcination　utilizing　Ti3AlC2,　fluoride　salts　and　melamine　as　raw　materials　in　CO2　atmosphere.　One-step　calcination　process　simultaneously　achieved　the　etch　of　Al　layers　of　Ti3AlC2　by　molten　fluoride　salts,　the　generation　of　g-C3N4　with　melamine　as　precursor　and　the　oxidation　of　Ti3C2　by　CO2.　TiO2@C/g-C3N4　for　photo　catalytic　activation　of　hydrogen　peroxide　(H2O2)　had　as　high　as　94.0%　removal　rate　of　NO　at　parts　per　million　level　in　a　normal　temperature　environment.　This　efficiency　was　5.3　times　and　8.0　times　that　of　TiO2@C/g-C3N4　and　H2O2　individually,　due　to　the　synergy　between　photocatalysis　and　H2O2　oxidation.　Meantime,　TiO2@C/g-C3N4　exhibited　an　enhanced　performance　compared　with　g-C3N4　(40.3%)　and　TiO2@C　(64.1%)　for　Z-type　heterojunction　accelerating　the　separation　of　electron-hole　pairs.　The　mechanism　was　proposed　that　Z-type　TiO2@C/g-C3N4　heterojunction　activated　H2O2　under　visible　light　to　generate　hydroxyl　radical　and　superoxide　radical　for　oxidation　of　NO.