用水作为分散剂,掺杂一定量的CuO于Bi12TiO20中,采用高能球磨法制备了可见光催化剂p-CuO/n-Bi12TiO20.利用UV-Vis、XRD、SEM和TEM等仪器对样品进行了分析与表征.以可见光(λ＞400 un)为光源,探讨了CuO的掺杂量和球磨时间对Cr6+催化还原性能的影响.结果表明,p-CuO/n-Bi12TiO20的可见光光催化活性高于Bi12TiO20的光催化活性.当掺杂量是1.Owt%,球磨时间9 h时,Cr6+的降解率达到89%.可见光活性提高的原因,可能是由于催化剂中复合半导体结构的光生电子-空穴对的有效分离造成的.
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