S. Moradi, P. Aberoomand Azar, S. Raeis-Farshid, S. Abedini-Khorrami, and M. Hadi Givianrad, “Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour”, ajc, vol. 25, no. 12, pp. 6635–6638, Jun. 2013.