Preparation of novel YBiO3/Bi2O3 heterostructured composite with high visible light photocatalytic activity
The highly efficient, visible light responsive composite photocatalyst, YBiO3/Bi2O3 was first prepared by a combination of the precipitation and hydrothermal method. The formation of YBiO3/Bi2O3 heterostructure was confirmed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). Compared to pure Bi2O3, UV-vis diffuse reflection spectroscopy (DRS) results revealed that the composite exhibits characteristic absorption bands due to the interaction of Bi2O3 and YBiO3 in the heterostructure. Methyl orange (MO) degradation experiments showed that the heterostructured YBiO3/Bi2O3 had a notably higher photocatalytic activity than the individual Bi2O3 under visible light. All experimental results showed that the heterostructure was not only responsible for the high photocatalytic activity but also played a vital role in improving the separation of photo-induced electrons and holes. A possible mechanism for the enhanced photocatalytic activity was proposed.
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Document Type: Research Article
Publication date: August 1, 2015
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