PHOTOCHEMICAL STABILITY AND ADSORPTIVE BEHAVIOR OF BIOMASS-DERIVED GRAPHENE OXIDE SYNTHESIZED FROM 4M NAOH–ACTIVATED COCONUT SHELL CARBON. PoP : Pillar of Physics [Internet]. 2026 Apr. 30 [cited 2026 May 15];19(1):41-6. Available from: https://pop.ppj.unp.ac.id/index.php/pop/article/view/62