Preparation of Magnetic Graphene Photocatalytic Nano-adsorbent for the Sustainable Removal of Polycyclic Aromatic Hydrocarbons from Aqueous Solution

Abstract

Magnetic graphene oxide-SiO2-TiO2 (MGST) composite was prepared for the absorption and further photodegradation of PAHs to reduce the risk of PAHs in the water environment. Magnetic graphene oxide (MGO) was obtained by introducing Fe3O4 to graphite oxide (GO). Furthermore, the suitable SiO2 layer was wrapped on the MGO for further modification with TiO2. Finally, the functional MGST composite with uniform morphology was obtained. Naphthalene, phenanthrene and pyrene were selected as models. It was found that the adsorption capacity of MGST showed the order of naphthalene (NAP) < phenanthrene (PHE) < pyrene (PYR).