We　report　the　first　use　of　polymeric　carbon　nitride　(CN)　for　the　catalytic　selective　oxidation　of　H2S.　The　as-prepared　CN　with　unique　ultrathin　＂nanomeshes＂　structure　exhibits　excellent　H2S　conversion　and　high　S　selectivity.　In　particular,　the　CN　nanomesh　also　displays　better　durability　in　the　desulfurization　reaction　than　traditional　catalysts,　such　as　carbon-　and　iron-based　materials.　©　2018　The　Royal　Society　of　Chemistry.