V. Vaiano, O. Sacco, D. Sannino, M. Stoller, P. Ciambelli, A. Chianese, Photocatalytic Removal of Phenol by Ferromagnetic N- TiO₂/SiO₂/Fe₃O₄ Nanoparticles in presence of Visible Light Irradiation, Chemical Engineering Transactions. 47 (2016) 235-240. doi:10.3303/CET1647040.