Rapid degradation of dyes in water by magnetic Fe(0)/Fe3O4/graphene composites.
Magnetic Fe(0)/Fe3O4/graphene has been successfully synthesized by a one-step reduction method and investigated in rapid degradation of dyes in this work. The material was characterized by N2 sorption-desorption, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), vibrating-sample magnetometer (VSM) measurements and X-ray photoelectron spectroscopy (XPS). The results indicated that Fe(0)/Fe3O4/graphene had a layered structure with Fe crystals highly dispersed in the interlayers of graphene, which could enhance the mass transfer process between Fe(0)/Fe3O4/graphene and pollutants. Fe(0)/Fe3O4/graphene exhibited ferromagnetism and could be easily separated and re-dispersed for reuse in water. Typical dyes, such as Methyl Orange, Methylene Blue and Crystal Violet, could be decolorized by Fe(0)/Fe3O4/graphene rapidly. After 20min, the decolorization efficiencies of methyl orange, methylene blue and crystal violet were 94.78%, 91.60% and 89.07%, respectively. The reaction mechanism of Fe(0)/Fe3O4/graphene with dyes mainly included adsorption and enhanced reduction by the composite. Thus, Fe(0)/Fe3O4/graphene prepared by the one-step reduction method has excellent performance in removal of dyes in water.
School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China. Electronic address: chongshan@ruc.edu.cn.
Shan
S
Chong
School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China. Electronic address: zgm@ruc.edu.cn.
Guangming
G
Zhang
School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China.
Huifang
H
Tian
School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China.
He
H
Zhao
D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D056951:Photoelectron Spectroscopy; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction
D004396:Coloring Agents; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; D006108:Graphite
Dyes; Fe(0)/Fe(3)O(4)/graphene; Magnetic; Reduction; Removal