We　report　the　first　use　of　carbon-doped　boron　nitride　(BCN)　for　H2S-selective　catalytic　oxidation.　The　obtained　carbon-doped　BN　with　an　ultrathin　layer　structure　exhibits　outstanding　H2S　elimination　and　high　S　yield.　In　particular,　BN　doped　carbon　nanosheets　display　better　catalytic　performance　than　traditional　catalysts,　such　as　iron-　and　carbon-based　catalysts.　The　findings　of　the　present　work　shed　a　new　light　on　metal-free　catalysts　for　efficient　catalytic　removal　of　toxic　H2S.　©　2023　The　Royal　Society　of　Chemistry.