In this work, we report an ecofriendly and sustainable approach to recycle the waste toner powder enriched in organic residues and magnetic Fe₃O₄. The direct calcination of waste toner powder at 600?°C ensures the complete decomposition of organic residues and transformation of Fe₃O₄ into useful magnetic Fe₂O₃ without any single chemical treatments. We also exploit the e-waste derived Fe₂O₃ as an iron precursor and thiourea for the fabrication of g-C₃N₄-Fe₂O₃ photocatalyst through facile one-step calcination process. The obtained Fe₂O₃ and g-C₃N₄-Fe₂O₃ were characterized by XRD, TGA, SEM-EDS, TEM, BET, XPS, UV?vis. DRS, FT-IR, PL, EIS and VSM. The photocatalytic activity of the g-C₃N₄-Fe₂O₃ was evaluated by the degradation of Methyl Orange (MO) and Textile Effluents (TE) under sunlight. The resultant g-C₃N₄-Fe₂O₃ exhibited better photocatalytic activity than the Fe₂O₃ and g-C₃N_4. Owing to the excellent stability and magnetic separation ability, g-C₃N₄-Fe₂O₃ composite displayed superb recyclability without loss of significant photocatalytic activity up to five repeated runs and more significantly, it can be recovered magnetically. This novel e-waste recycling strategy may provide new possibilities for a large-scale and low-cost transformation of waste toner powder into magnetically separable photocatalyst for wastewater treatment.