Citation: LIU Yan-Fang, MA Xin-Guo, YI Xin, ZHU Yong-Fa. Controllable Synthesis and Photocatalytic Performance of Bismuth Phosphate Nanorods[J]. Acta Physico-Chimica Sinica, ;2012, 28(03): 654-660. doi: 10.3866/PKU.WHXB201112232 shu

Controllable Synthesis and Photocatalytic Performance of Bismuth Phosphate Nanorods

1.
1. Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China;
2. College of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China;
3. Department of Chemistry, Shanghai Normal University, Shanghai 200234, P. R. China

Received Date: 15 September 2011
Available Online: 23 December 2011
Fund Project: 国家自然科学基金(20925725, 50972070, 51102150) (20925725, 50972070, 51102150)国家重点基础研究发展规划项目(973) (2007CB613303)资助 (973) (2007CB613303)

BiPO₄ nanorods with controlled morphologies were fabricated using a hydrothermal method. The photocatalytic activity of the BiPO₄ nanorods was investigated by their ability to degrade methylene blue (MB). The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-Vis diffuse reflectance spectroscopy (DRS). It was found that glycerol content, reaction time and temperature, and concentration of precursor influenced the morphology and structure of the product. The glycerol content and concentration of precursor mainly influence the morphology of the product. As the glycerol content increases, the aspect ratio first increases, and then decreases. The aspect ratio of the product increases and the size decreases as the concentration of precursor is lowered. When the reaction time is short, the crystallinity of the product is poor, and it forms a hexa nal phase. Hexa nal BiPO₄ transforms into the monoclinic product when the reaction time is longer. The optimal temperature for crystal formation was found to be 160 °C. The results show that BiPO₄ nanorods possess excellent photocatalytic activity under ultraviolet light. The photocatalytic activity of BiPO₄ increased with an increase of aspect ratio and decrease of particle size. The crystallinity of the product has a significant influence on its photocatalytic activity. BiPO₄ with higher crystallinity has higher photocatalytic activity, and monoclinic BiPO₄ has higher photocatalytic activity than hexa nal BiPO₄.
- Bismuth phosphate,
- Nanorod,
- Hydrothermal method,
- Controllable synthesis,
- Photocatalysis,
- Methylene blue
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