Usman, A., Saidu, U., Ibrahim, Y., & Musa Aminu, A. (2026). Effect of Calcination Temperature on the Structural, Optical, and Photocatalytic Properties of Urea-Derived g-C3N4 for Methylene Blue Degradation. FUDMA Journal of Sciences, 10(14), 132-138. https://doi.org/10.33003/fjs-2026-1014-5722