See, Li Fang, et al. “Tin-Doped Titanium Dioxide Photocatalysts Prepared via Hydrothermal Method: Effect of Calcination Temperature on Dye Degradation Efficiency ”. Malaysian Journal of Catalysis, vol. 10, no. 1, June 2026, pp. 101-8, doi:10.11113/mjcat.v10n1.205.