【摘要】 以Bi（NO₃）₃·5H₂O,Na₂WO₄·2H₂O和NH₄VO₃为原料,采用水热法合成Bi₂WO₆/BiVO₄复合材料,并对其进行X射线粉末衍射（XRD）、扫描电子显微镜（SEM）表征,探讨了合成条件（质量配比、温度）对Bi₂WO₆/BiVO₄复合材料的晶型、形貌等方面的影响。以甲基橙水溶液为目标降解物,研究了在氙灯光源照射作用下Bi₂WO₆/BiVO₄复合材料的光催化性能,结果表明:温度对Bi₂WO₆和BiVO₄的光催化性能有较大影响;在Bi₂WO₆和BiVO₄质量比为1∶1,处理温度为300℃时Bi₂WO₆/BiVO₄光催化材料具有较好的光催化活性,对甲基橙的光催化降解效率可达到97.63%。复合材料重复使用5次其降解效率没有明显的变化,催化剂的稳定性较好。更多还原

【Abstract】 Bi₂WO₆/BiVO₄ composite photocatalyst crystals were prepared by hydrothermal method used Bi（NO₃）₃·5 H₂O, Na₂WO₄·2 H₂O and NH4 VO₃ as raw materials. Bi₂WO₆/BiVO₄ composites’ s crystal form and morphology influenced by mass ratio and calcine temperature were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）.The photocatalytic performance of Bi₂WO₆/BiVO₄ composite was determined by the methyl orange used as the degradation substance under xenon lamp. The results showed that calcine temperature affect the photocatalytic activity of Bi₂WO₆/BiVO₄ much more. The sample calcine at 300 ℃ with BiWO₆ and BiVO₄ mass ratio of 1∶1, show best catalytic activity, and the degradation rate of methyl orange reach to 97.63%. After repeated 5 times the degradation ration of methyl orange almost unchanged, showing good reusability.更多还原