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采用一种简便的方法制备了氧化锌插层蒙脱土纳米复合材料。首先将蒙脱土充分充水后进行冷冻,具有层状结构的蒙脱土充水后会发生膨胀,部分从块状的蒙脱土上剥离形成超薄的片层结构。然后通过可控的水热过程使氧化锌纳米粒子进入蒙脱土层间或覆盖于表面。结果表明,直径1~3nm的纳米氧化锌会插层于蒙脱土的层间,而直径达10~25nm的纳米氧化锌则会镶嵌在蒙脱土表面。该纳米复合材料对模拟污染物甲基橙具有优异的光催化性能。
Zinc oxide intercalated montmorillonite nanocomposites were prepared by a simple and convenient method. Firstly, the montmorillonite is fully filled with water and then frozen. The montmorillonite with a layered structure is expanded after being filled with water, and part of the montmorillonite is peeled off from the massive montmorillonite to form an ultra-thin sheet structure. Zinc oxide nanoparticles are then intercalated into or between the montmorillonite layers by a controlled hydrothermal process. The results show that nanometer zinc oxide with a diameter of 1 ~ 3nm intercalates into the interlayer of montmorillonite, while nanometer zinc oxide with a diameter of 10 ~ 25nm will be embedded in the surface of the montmorillonite. The nanocomposites have excellent photocatalytic activity for the simulated pollutant methyl orange.