Efficient removal of organic pollutants with magnetic Nanoscaled BiFeO(3) as a reusable heterogeneous fenton-like catalyst.
BiFeO(3) magnetic nanoparticles (BFO MNPs) were prepared with a sol-gel method and characterized as a catalyst. It was found that BFO MNPs effectively catalyzed the decomposition of H(2)O(2) into *OH radicals, being confirmed with electron spin resonance spin-trapping technique and other radical probing techniques. The strong H(2)O(2)-activating ability of BFO MNPs showed promising applications in the oxidative degradation of organic pollutants. When BFO MNPs were used as a heterogeneous Fenton-like catalyst to degrade Rhodamine B, the apparent rate constant for the RhB degradation at 25 degrees C at pH 5.0 in the BFO MNPs-H(2)O(2) system was evaluated to be 2.89 x 10(-2) min(-1), being about 20 folds of that obtained with Fe(3)O(4) MNPs as the catalyst under similar conditions. Moreover, BFO MNPs were demonstrated to have excellent stability and reusability. The catalytic mechanism of BFO MNPs was also investigated with Monte Carlo simulations and density functional theory calculations.
College of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R. China.
Wei
W
Luo
Lihua
L
Zhu
Nan
N
Wang
Heqing
H
Tang
Meijuan
M
Cao
Yuanbin
Y
She
D001729:Bismuth; D002384:Catalysis; D003497:Cyclic N-Oxides / Q000737:chemistry; D004785:Environmental Pollutants / Q000302:isolation & purification; D005290:Ferric Compounds / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000302:isolation & purification; D007202:Indicators and Reagents; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D053769:Nanocapsules / Q000737:chemistry; D009566:Nitrates; D009930:Organic Chemicals / Q000302:isolation & purification*; D013053:Spectrophotometry; D013113:Spin Labels; D013816:Thermodynamics
D003497:Cyclic N-Oxides; D004785:Environmental Pollutants; D005290:Ferric Compounds; D007202:Indicators and Reagents; D053769:Nanocapsules; D009566:Nitrates; D009930:Organic Chemicals; D013113:Spin Labels; D017665:Hydroxyl Radical; C065545:bismuth nitrate; D001729:Bismuth