Black BiOCl with disorder surface structure prepared by Fe reduction and the enhanced photocatalytic activity |
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Affiliation: | 1. Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University, Hefei 230039, China;2. Institute of Physical Science and Information Technology, Anhui University, Hefei 230039, China |
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Abstract: | Black bismuth oxychloride (BiOCl) with disordered surface structure has been prepared by a facile Fe reduction method and successfully used as a visible-light photocatalyst. XRD and FESEM results showed that black BiOCl has pure BiOCl phase with plate-like structure. The as-prepared black sample exhibited a broad absorption covered the whole visible light region. The high-resolution TEM images revealed the disordered surface structure, which could be the reason for the black color of BiOCl. The disordered surface was not only responsible for the visible-light absorption but also played a vital role in improving the separation of photo-induced electrons and holes. Methyl orange (MO) photocatalytic degradation experiments showed that the black sample exhibited higher photocatalytic activity than the pristine BiOCl under visible light irradiation. A possible formation mechanism of black BiOCl under Fe reduction was also proposed in our research work. |
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Keywords: | Bismuth oxychloride Semiconductors Optical properties Microstructure Photocatalysis |
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