Moradi, S. et al. 2013. Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour. Asian Journal of Chemistry. 25, 12 (Jun. 2013), 6635–6638. DOI:https://doi.org/10.14233/ajchem.2013.14394 .