异丙醇诱导合成BiVO_4微米管及其可见光光催化性能研究

Isopropanol Induced Synthesis and Photocatalytic Properties of BiVO_4 Microtubes

在水热条件下,以异丙醇为诱导剂,制备出结晶良好的具有白钨矿结构的BiVO4四方管状颗粒。采用XRD、SEM、UV-VisDRS考察了BiVO4颗粒的物相、形貌和光催化性能,结果表明,BiVO4微米管表现出明显的四方对称性,长约5～8μm,管径约1μm,管壁厚为100～150nm,并在可见光范围内表现出了优良的可见光催化活性。同时,探讨了异丙醇添加量和保温时间对BiVO4物相和颗粒形貌的影响,研究表明,当异丙醇添加量为20%、保温时间为1h时即可得到发育良好的BiVO4微米管。

Crystalline bismuth vanadate （BiVO4） microtubes are synthesized under hydrothermal conditions with isopropanol as the organic inducer. The products are characterized by XRD, SEM and UV-Vis spectrophotometer. The results indicate that BiVO4 microtubes have monoclinic structure, length is 5-8μm, diameter is about 1μm, pipe wall thickness is 100-150nm and exhibit higher photocatalytic activity in visible light irradiation. The amount of isopropanol and time played a significant roles on the phase and morphology of BiVO4 particles. The crystalline BiVO4 microtubes can be synthesized by hydrothermal treated for lh with adding 20% isopropanol.