The types segment classifies graphene‑based materials into five sub‑categories: graphene oxide (GO), reduced graphene oxide (rGO), graphene nanoplatelets, functionalized graphene, and graphene aerogels. GO, with abundant oxygen‑containing groups, offers superior hydrophilicity and facilitates surface functionalization, making it the preferred choice for adsorption‑driven purification processes. rGO provides enhanced electrical conductivity and mechanical strength, enabling electro‑chemical disinfection and catalytic degradation pathways. Graphene nanoplatelets, characterized by larger lateral dimensions, improve membrane tensile strength and contribute to higher flux rates in pressure‑driven systems. Functionalized graphene incorporates tailored chemical groups (e.g., amine, sulfonic) to target specific pollutants, thereby increasing selectivity and reducing regeneration cycles. Graphene aerogels, possessing ultra‑low density and high porosity, serve as three‑dimensional scaffolds for high‑capacity contaminant capture and rapid flow-through applications. The diversity of these material types underpins the market’s ability to address varied purification challenges, reinforcing the overall market taxonomy.