Bi₂S₃纳米棒为模板合成了形貌可控的BiPO₄纳米棒复合光催化剂。在可见光辐射下,该复合催化剂表现出优异的光催化降解亚甲基蓝(MB)的性能。UV-Vis漫反射谱结果表明:催化剂经过Bi₂O₃修饰后对可见光有很好吸收;X射线衍射仪和透射电镜等表征结果表明,所制备的BiPO₄纳米催化剂为直径约30 nm、长约200~500 nm的纳米棒。表面修饰少量Bi₂O₃可明显促进光催化剂对亚甲基蓝(MB)的可见光降解效率,其活性是未修饰催化剂的1.7倍。光电流和N₂吸附实验也表明表面修饰后的催化剂光电流和BET比表面积都明显增加。这可能是由于表面修饰的Bi₂O₃不仅显著提高了BiPO₄纳米棒复合催化剂的可见光吸收,而且在BiPO₄表面起到了富集电子和传输电子的作用。结果表明表面修饰Bi₂O₃的BiPO₄纳米棒是一种高活性的光催化材料。

BiPO₄ nanorod composite photocatalyst with controllable morphology was synthesized by using Bi₂S₃ nanorods as a template. This composite catalyst exhibited excellent photocatalytic performance for methylene blue (MB) degradation under visible light irradiation. UV-Vis diffuse reflectance spectroscopy results showed that the Bi₂O₃ modified BiPO₄ catalyst had higher visible light absorption. X-ray diffraction and transmission electron microscopy results indicated that as-prepared BiPO₄ catalyst was nanorods with diameter of about 30 nm and length of 200-500 nm. Surface modification with small amount Bi₂O₃ could significantly promote visible light degradation efficiency of MB, which was about 1.7 times higher than that of the unmodified BiPO₄ catalyst. Photocurrent and N₂ adsorption experiments showed that the photocurrent and BET specific surface area increased significantly after surface modification. Bi₂O₃ modification not only enhanced visible light absorption ability of catalyst but also presented a center for the enhancement of electron transfer. The results showed BiPO₄ catalyst with Bi₂O₃ modification was a high activity photocatalytic material.