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采用微波水热法,通过控制反应时间合成了斜方相的片状Bi2MoO6微晶。通过X射线衍射仪、场发射扫描电子显微镜和紫外–可见光谱分别对产物的物相、形貌和光学性能进行分析,研究了水热反应时间对所制备的Bi2MoO6微晶的光催化活性的影响。结果表明:微波水热条件下,反应温度为160℃时,反应时间仅为10 min即可得到片状Bi2MoO6微晶,随着反应时间的延长,Bi2MoO6微晶片状尺寸有所增加。所制备的样品对可见光有一定的吸收;在160℃,60min的条件下合成的Bi2MoO6微晶,在1kW氙灯照射160min对罗丹明B的降解率达到了99%,显示了其优良的可见光催化性能。
By the microwave hydrothermal method, the lamellar Bi2MoO6 crystallites were synthesized by controlling the reaction time. The phase, morphology and optical properties of the product were analyzed by X-ray diffraction, field emission scanning electron microscopy and ultraviolet-visible spectroscopy. The effects of hydrothermal reaction time on the photocatalytic activity of the prepared Bi2MoO6 crystallites were investigated. . The results show that under microwave hydrothermal conditions, the reaction temperature is 160 ℃, the reaction time is only 10 min to obtain flaky Bi2MoO6 crystallites, with the extension of the reaction time, Bi2MoO6 microcrystalline sheet size increased. The prepared sample has certain absorption to visible light. The Bi2MoO6 crystallites synthesized under the conditions of 160 ℃ and 60min, the degradation rate of rhodamine B reached 99% after irradiated with 1kW xenon lamp for 160min, which showed its excellent photocatalytic activity .