Vaiano V., Sacco O., Sannino D., Stoller M., Ciambelli P., Chianese A., 2016, Photocatalytic Removal of Phenol by Ferromagnetic N- TiO₂/SiO₂/Fe₃O₄ Nanoparticles in presence of Visible Light Irradiation, Chemical Engineering Transactions, 47, 235-240.