Facile Synthesis of Templated Activated Carbon from Cellulose Nanofibers and MgO Nanoparticles via Integrated Carbonization-activation Method as an Eco-friendly Supercapacitor

A green, rapid, and facile synthesis method of activated carbon was developed optimized using 50 nm MgO nanoparticle (NP)-based pore templating in tandem with an integrated drying carbonization-activation heat treatment. TEMPO-oxidized cellulose nanofibers (TOCN) were mixed NPs KOH, freeze-dried, treated first at 350 °C then 800 to get templated carbon. Selective formation by KOH resulting the development mesopores micropores, respectively confirmed. NP-based is confirmed be viable even continuous treatment, does not affect any transformations during each treatment phase. Through optimization for highest surface area optimal hierarchical porosity, had a high specific capacitance 269 F g−1 0.5 95.92 % cycle stability after 2000 charge-discharge cycles 10 g−1.