Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi2O3 Photocatalyst

doi:10.3724/SP.J.1077.2012.00643

Abstract

Abstract: Bi₂O₃ photocatalysts doped with different amounts of nitrogen were synthesized by a precipitation method using bismuth nitrate and hexamethylenetetramine as precursors. The as-synthesized samples were characterized and analyzed by XRD, FT-IR, XPS, UV-Vis and PL. The results indicate that the undoped Bi₂O₃displays a single monoclinic phase. While the N-doped Bi₂O₃ samples are mixed crystals, which were composed of tetragonal β-Bi₂O₃ and Bi₅O₇NO₃ phases. The oxygen in the lattice of Bi₂O₃ is partially substituted by nitrogen atom, existed stably in the form of Bi-N bond. Meanwhile, nitrogen dopant promotes the formation of β-Bi₂O₃ phase. Compared with undoped Bi₂O₃, the light absorption property of N-doped Bi₂O₃ has apparently extended into visible light region and the fluorescence intensity decreases evidently. Furthermore, the photodegradation performance of methyl orange shows that N-doped Bi₂O₃ samples have excellent visible light photocatalytic activity.

Key words: Bi₂O₃, nitrogen-doped, visible light, photocatalysis, methyl orange

CLC Number:

O643

LU Yuan-Gang, YANG Ying-Chun, YE Zhi-Xiang, LIU Sheng-Yu. Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi₂O₃ Photocatalyst[J]. Journal of Inorganic Materials, 2012, 27(6): 643-648.

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Preparation and Visible Light Responsive Photocatalytic Activity of Nitrogen-doped Bi₂O₃ Photocatalyst

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