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The paper critically addresses two contemporary environmental challenges, the water crisis and the unrestricted discharge of organic pollutants in waterways together. An eco-friendly method was used to fabricate a cellulose/gC 3 N 4/TiO 2 photocatalytic composite that displayed a remarkable degradation of methylene blue dye and atenolol drug under natural sunlight. Introducing graphitic carbon nitride (gC 3 N 4) onto pristine TiO 2 improved hybrid material's photonic efficacy and enhanced interfacial charge separation. Furthermore, immobilizing TiO 2/gC 3 N 4 on a semi-interpenetrating cellulose matrix promoted photocatalyst recovery and its reuse, ensuring practical affordability. Under optimized conditions, the nano-photocatalyst exhibited∼ 95% degradation of both contaminants within two hours while retaining∼ 55% activity after ten cycles demonstrating a promising photostability. The nano-photocatalyst …