物理化学学报2012，Vol.28Issue(3)：654-660,7.DOI:10.3866/PKU.WHXB201112232
磷酸铋纳米棒的可控合成及其光催化性能
Controllable Synthesis and Photocatalytic Performance of Bismuth Phosphate Nanorods
摘要
Abstract
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 hexagonal phase. Hexagonal BiPO4 transforms into the monoclinic product when the reaction time is longer. The optimal temperature for crystal formation was found to be 160 ℃. 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 hexagonal BiPO4.关键词
磷酸铋/纳米棒/水热法/可控合成/光催化/亚甲基蓝Key words
Bismuth phosphate/Nanorod/Hydrothermal method/Controllable synthesis/Photocatalysis/Methylene blue分类
化学化工引用本文复制引用
刘艳芳,马新国,易欣,朱永法..磷酸铋纳米棒的可控合成及其光催化性能[J].物理化学学报,2012,28(3):654-660,7.基金项目
国家自然科学基金(20925725,50972070,51102150)及国家重点基础研究发展规划项目(973)(2007CB613303)资助 （20925725,50972070,51102150）
