Graphitic Carbon Nitride Microspheres Supported α-FeO(OH) Hybrids for Visible Light Photodegradation of MO

Abstract

Graphitic carbon nitride(g-C₃N₄) microspheres supported α-FeO(OH) hybrids[α-FeO(OH)/g-C₃N₄] were prepared by means of a self-assembly method in deionized water. By UV-visible diffuse reflectance spectroscopy, it has been confirmed that α-FeO(OH)/g-C₃N₄ has a wider absorption range than g-C₃N₄. The feature of α-FeO(OH)/g-C₃N₄ can be attributed to the efficient separation of the electron-hole pairs with photoluminescence spectra. The degradation rate of methyl orange(MO) is up to 99% under the optimal conditions of 110 min, initial concentration of 30 mg/L, an α-FeO(OH)/g-C₃N₄ dosage of 15 mg as well as visible light. The mechanism for this photocatalytic reaction was proposed, with hydroxyl radicals being a major active catalytic species.

Keywords

α-FeO(OH)/g-C₃N₄ / Self-assembly method / Photocatalyst / Methyl orange(MO) / Visible light

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