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An ionic porous aromatic framework is developed as a self-degraded template to synthesize the magnetic heterostructure of γ-Fe 2 O 3 /WO 3 ·0.5H 2 O. The Fe 3 O 4  polyhedron was obtained with the two-phase method first and then reacted with sodium tungstate to form the γ-Fe 2 O 3 /WO 3 ·0.5H 2 O hybrid nanostructure. Under the induction effect of the ionic porous network, the Fe 3 O 4  phase transformed to the γ-Fe 2 O 3  state and complexed with WO 3 ·0.5H 2 O to form the n-n heterostructure with the n-type WO 3 ·0.5H 2 O on the surface of n-type γ-Fe 2 O 3 . Based on a UV-Visible analysis, the magnetic photocatalyst was shown to have a suitable band gap for the catalytic degradation of organic pollutants. Under irradiation, the resulting γ-Fe 2 O 3 /WO 3 ·0.5H 2 O sample exhibited a removal efficiency of 95% for RhB in 100 min. The charge transfer mechanism was also studied. After the degradation process, the dispersed powder can be easily separated from the suspension by applying an external magnetic field. The catalytic activity displayed no significant decrease after five recycles. The results present new insights for preparing a hybrid nanostructure photocatalyst and its potential application in harmful pollutant degradation.

molecules/molecules online/molecules annual

Ionic Porous Aromatic Framework as a Self-Degraded Template for the Synthesis of a Magnetic γ-Fe2O3/WO3·0.5H2O Hybrid Nanostructure with Enhanced Photocatalytic Property