采用共沉淀法制备了CuCoAl水滑石,利用XRD、SEM、TG-DTA、UV-vis DRS、比表面积和孔径分析等方法分析表征样品,并测试了可见光下降解甲基橙的活性.结果表明,Cu∶ Co∶ Al=1∶1∶1时制备的CuCoAl水滑石结晶度高,层状结构完整,比表面积较大,孔径适宜,在甲基橙浓度为20 mg/L,催化剂添加量为1 g/L时,4h内可见光下甲基橙的降解率可达97％,降解过程符合一级反应动力学特征.CuCoAl水滑石层板上扭曲的CuO6八面体,Co2+的电子捕获及传递能力,层板上OH-的传递电子能力均使得CuCoAlLDHs具有高的可见光催化活性.
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