List of Articles Photo-catalytic activity Open Access Article Abstract Page Full-Text 1 - Preparation, Characterization, and Investigation of Photocatalytic Activity of TiO2/SiO2/Co Nanocomposite Using Additives Shahram Moradi Parviz Aberomand Azar Bahar Khodadadi Saied Abedini Khorami Mohammad Hadi Givianrad