Hydrothermal growth of TiO2 nanosheets on single layer graphene oxide for photocatalytic degradation of tetracycline antibiotic from artificial wastewater
Paper ID : 1466-ICNS
Salar Heydari Shalmani *, Fatemeh Firouzi, Azadeh Ebrahimian Pirbazari, Fatemeh Esmaeili Khalil Saraei
Fouman Faculty of Engineering, College of Engineering, University of Tehran, Fouman, 43516-66456, Iran
In the present work, TiO2 nanosheets (TNs) were successfully synthesized using one-pot hydrothermal method on different amounts (5,10 and15 mg) of single layer grapheme oxide TNs-G(x) samples, (x presents the amount of graphene oxide). Structural and morphological characteristics of the prepared binary nanocomposites were identified by FESEM/EDX, XRD and Raman techniques. The XRD and Raman analyses data confirmed that the formation of pure anatase phase for TNs and reduction of graphene oxide during hydrothermal synthesis in the prepared samples. The photocatalytic efficiency of the synthesized samples were evaluated by degradation of tetracycline (TC) antibiotic (30 mg/L) in the artificial wastewater under visible light. The TNs-G (15) showed the higher activity compared to other samples and we obtained 53.1% of TC degradation after 180 min irradiation under visible light. In the TNs-G(x) samples, the reduced graphene oxide acts as bridge for transferring photoinduced electrons from TiO2 nanosheets to dissolved oxygen molecules in TC solution and produced some active oxygen species ( OH• and O2-•) and it enhances the treatment activity of TNs-G(x) samples.
TiO2 Nanosheets; Graphene oxide; Tetracycline; Photocatalyst; Degradation.
Status : Abstract Accepted (Poster Presentation)