This　review　paper　carefully　examines　ion-doped　non-hydraulic　calcium　silicates＇　carbonation　behavior　and　properties,　notably　γ-C2S,　C3S2　and　CS,　emerging　as　viable　materials　for　sustainable　construction　applications.　The　carbonation　process　of　these　materials　offers　the　combined　benefits　of　increased　durability　and　CO2　sequestration,　providing　a　potential　pathway　to　mitigate　the　environmental　impact　of　conventional　cement.　Through　foreign　ion　doping　(e.g.,　barium,　magnesium,　and　sodium),　carbonation　reactivity　and　compressive　strength　are　significantly　enhanced　due　to　the　formation　of　stable　calcium　carbonate　polymorphs　(such　as　calcite　and　aragonite)　and　densified　matrices.　Magnesium　doping　is　noted　for　its　efficacy,　yielding　a　40　%　enhancement　in　carbonation　reactivity　and　an　increase　of　up　to　115　MPa　in　compressive　strength　of　γ-C2S　under　optimal　curing　conditions.　Key　experimental　parameters,　such　as　CO2　concentration,　temperature,　and　relative　humidity,　influence　carbonation　reactivity　and　are　essential　for　the　pilot-scale　application　of　these　materials　in　the　construction　industry.　The　review　also　discusses　future　research　directions,　including　the　potential　for　multi-dopant　systems,　AI-based　curing　optimization,　and　long-term　durability　studies　under　varied　environmental　conditions.　This　review　provides　a　fundamental　perspective　on　the　current　advances　and　challenges　of　using　ion-doped　non-hydraulic　calcium　silicates　as　sustainable　binders　in　the　construction　sector.　©　2025　Elsevier　Ltd