Photocatalytic Decolorization of Congo Red Wastewater by Magnetic ZnFe2O4/Graphene Nanosheets Composite under Simulated Solar Light Irradiation. (3rd March 2020)

• Record Type: Journal Article
• Authors: Jiang, Ru; Zhu, Hueyue; Fu, Yongqian; Jiang, Shengtao; Zong, Enmin; Yao, Jun
• Is Part Of: Ozone: science and engineering. Volume 42:Number 2(2020)
• Page Start: 174
• Page End: 182
• Publication Date: 2020-03-03
• Subjects: Ozone -- congo red -- photocatalysis -- decolorization -- zinc ferrite -- graphene nanosheet; Ozone -- Periodicals; 665.89
• DOI: 10.1080/01919512.2019.1635432
• Languages: English
• ISSNs: 0191-9512

Abstract

ABSTRACT: ZnFe2 O4 supported on graphene nanosheets (ZnFe2 O4 @GNs) was prepared by a one-step hydrothermal method. Characterization results of XRD and SEM demonstrated that ZnFe2 O4 has been anchored on the surface of graphene nanosheets. After four successive cycles, removal efficiency of congo red is 88.66% by ZnFe2 O4 @GNs while 39.80% by ZnFe2 O4, suggesting high photocatalytic stability of ZnFe2 O4 @GNs under simulated solar light. Quenching experiments confirmed that h + generated is the primary oxidizing agent, while both OH and O2 − reactive species are also involved for the photodegradation of organic dye pollutants. ZnFe2 O4 @GNs can be easily separated from the reacted aqueous solution using magnetic field. Results indicate the potential applications of ZnFe2 O4 @GNs in effective removal of organic dye wastewater.