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以五水硝酸铋和五氧化二钒为原料,通过微波合成法制备了纳米BiVO4,采用X-射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)表征了样品的形貌、结构和特性。XRD表明所制备的样品是纯的单斜晶型BiVO4;SEM显示样品的形貌呈层状结构;TEM进一步指出这些片层结构是由小粒子聚集而成的多孔结构。以催化降解甲基橙来考察其光催化性能。在100mL的10mg/L甲基橙溶液中加入0.12g经673K恒温热处理2h后的BiVO4及0.2mL H2O2,调节pH值为3.0,在可见光下照射90min后,降解率达到94.70%,催化性能良好。
Nanometer BiVO4 was prepared by microwave synthesis using bismuth nitrate pentahydrate and vanadium pentoxide as raw materials. The morphology of the sample was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) , Structure and characteristics. XRD shows that the prepared sample is pure monoclinic BiVO4. The SEM shows that the morphology of the sample is layered structure. TEM further indicates that the lamellar structure is a porous structure formed by aggregation of small particles. Catalytic degradation of methyl orange to examine its photocatalytic properties. In 100mL of 10mg / L methyl orange solution, 0.12g BiVO4 and 0.2mL H2O2 were added after heat treatment at 673K for 2h. The pH value was adjusted to 3.0. After 90min exposure to visible light, the degradation rate was 94.70%, and the catalytic performance was good.