7 / 2017-12-16 08:03:35

Synthesis of Magnetic Recoverable and Visible-light-driven Photocatalyst by immobilizing ZnFe2O4-BiOBr composites onto Attapulgite Surface

ZnFe2O4; BiOBr; Visible-light-driven; Attapulgite; Magnetic Recoverable

Magnetic separately photocatalyst has important application in the field of wastewater treatment. In this article, a magnetically recoverable and visible light driven composite photocatalyst was successfully obtained by introducing ZnFe2O4 and BiOBr nanoparticles onto the surface of attapulgite via hydrothermal method and in-situ precipitation method, respectively (marked as ATT-ZnFe2O4-BiOBr). The obtained samples were fully characterized by XRD, SEM, BET, UV-Vis measurements. It was found that ZnFe2O4 and BiOBr composite particles presented as a uniform distribution of spherical particles were successfully immobilized onto the surface of attapulgite without obvious aggregation. Compared with P25 and BiOBr, ATT-ZnFe2O4-BiOBr composites exhibit exceptional photocatalytic activity in visible-light degradation of 10 mg•L-1 methyl orange (MO). The highest degradation ratio of methyl orange reached to 97.61% within 80min photocatalyzed by ATT-ZnFe2O4-BiOBr, which is as 1.5 times as that of P25. Moreover, ATT-ZnFe2O4-BiOBr could be readily recovered and the degradation ratio maintains more than 95.00 % after 5 cycles, suggesting potential application prospects in the field of wastewater treatment.