S. Muhammad, Abdulfatah, Jamil T. Naser, Ilham Kirm, and Baba Y. Jibril. 2014. “Photocatalytic Degradation of Methylene Blue and Phenol Using TiO2 Activated-Carbon Composite Catalysts”. Asian Journal of Chemistry 27 (1):343-48. https://doi.org/10.14233/ajchem.2015.17936.