Sulfuric acid doped poly diaminopyridine/graphene composite to remove high concentration of toxic Cr(VI).

摘要: Abstract Sulfuric acid doped diaminopyridine polymers are synthesized in situ on graphene oxide surface via mutual oxidation–reduction technique. Exploiting large and highly porous surface, we have used this polymer composite as an adsorbent to remove high concentration of toxic Cr(VI) from water. It shows very adsorption capacity (609.76 mg g −1 ) during removal process. The takes only 100 min 500 mg L Interesting features for material is the enhancement efficiency at lower acidic condition due formation emeraldine salt polymerization. XPS AAS measurements reveal that our prepared mainly follows reduction mechanism higher while anions exchange experiments. Good recycling ability with ∼92% after fifth cycle also noticed material. Easy preparation, superior stability condition, remarkable excellent make efficient modern filtration units waste water purification.