Preparation of Bi-doped TiO2 nanoparticles and their visible light photocatalytic performance

doi:10.1016/S1872-2067(14)60124-8

Abstract

Abstract:

Bi-doped TiO₂ photocatalysts were prepared by a hydrothermal method using nanotube titanic acid as the Ti precursor. The samples were characterized by X-ray diffraction, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Methyl orange (MO) was used as a model contaminant to evaluate the visible light photocatalytic activity of the Bi-doped TiO₂ samples. We found that the Bi ions did not incorporate into the TiO₂ lattice but instead existed in the form of BiOCl. The obtained BiOCl-composited TiO₂ samples exhibited remarkable photocatalytic activity under visible light irradiation for the photodegradation of MO. The sample obtained when the Bi/Ti molar ratio was 1% and the hydrothermal treatment temperature was 130 ℃ (BTO-130-1) showed the highest photocatalytic activity. Moreover, a possible mechanism was proposed and the enhanced photocatalytic activity was discussed. The as-prepared catalyst also showed high photocatalytic activity for the photodegradation of 4- chlorophenol.

Key words: Hydrothermal method, Bismuth-doping, Titanium dioxide, Nanotube titanic acid, Oxygen vacancy, Visible light photocatalysis

Haiyan Li, Jinfeng Liu, Junjie Qian, Qiuye Li, Jianjun Yang. Preparation of Bi-doped TiO₂ nanoparticles and their visible light photocatalytic performance[J]. Chinese Journal of Catalysis, 2014, 35(9): 1578-1589.

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Preparation of Bi-doped TiO₂ nanoparticles and their visible light photocatalytic performance

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