As　a　highly　toxic　and　corrosive　waste　gas,　the　selective　elimination　of　H2S　is　of　great　significance　in　terms　of　safety　production　and　environmental　protection.　In　this　short　review,　we　focus　on　porous　carbons,　nano　g-C3N4,　and　polymers　that　have　been　functionalized　with　structural　base　nitrogen　sites　because　nitrogen-doped　metal-free　materials　are　superior　to　traditional　metal-based　catalysts　in　activity　and　reusability　in　H2S　selective　oxidation.　Compared　with　g-C3N4,　the　porous　polymer　and　carbon　solid　bases　could　be　adjusted　not　only　in　porous　structure　but　also　in　the　structure　of　nitrogen-containing　base　sites.　It　is　especially　so　for　the　porous　polymeric　solid　bases,　which　could　be　tuned　to　show　hydrophobic　property　and　water　resistance　ability,　endowing　the　materials　with　excellent　catalytic　performance　in　moisture　environment.　These　newly　developed　metal-free　catalysts　can　be　applied　for　the　deep　elimination　of　H2S　in　industrial　processes　while　having　H2S　converted　to　useful　sulfur.