title: Degradation of methylene blue with H2O2 activated by peroxidase-like Fe3O4 magnetic nanoparticles.
abstract: Fe3O4 magnetic nanoparticles (Fe3O4 MNPs) were successfully prepared through an advanced reverse co-precipitation method under the assistance of ultrasound irradiation. The structure and size distribution were characterized by X-ray powder diffraction (XRD), laser particle size analyzer (LPSA), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy. The magnetic properties of Fe3O4 nanoparticles were measured by the vibrating sample magnetometer (VSM). Such Fe3O4 MNPs were used as a peroxidase mimetic to remove the dye pollutant methylene blue (MB) in the presence of H2O2. Some important reaction parameters were optimized to improve the degradation of MB. It was observed that the degradation efficiency of 10 mg L(-1) MB was above 96% over 0.62 g L(-1) Fe3O4 MNPs within 0.30 mmol L(-1) H2O2 at pH 4.85 and temperature 25 degrees C in 15 min, being superior to the previous reports.
authors.affiliation: School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Hubei Key Lab of Novel Chemical Reactor and Green Chemical Technology, Wuhan 430074, PR China.
authors.forename: Jizhou
authors.initials: J
authors.lastname: Jiang
authors.forename: Jing
authors.initials: J
authors.lastname: Zou
authors.forename: Lihua
authors.initials: L
authors.lastname: Zhu
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Haipeng
authors.initials: H
authors.lastname: Jiang
authors.forename: Yuanxiao
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D002384:Catalysis; D011232:Chemical Precipitation; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry* / Q000378:metabolism; D010316:Particle Size; D009195:Peroxidase / Q000737:chemistry* / Q000378:metabolism; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D058185:Magnetite Nanoparticles; D006861:Hydrogen Peroxide; D009195:Peroxidase; D008751:Methylene Blue