可磁分离Cu2O光催化剂的制备与光催化活性

摘要

采用共沉淀法制备了镍锌铁氧体,水合肼还原法制备了镍锌铁氧体负载Cu2O可磁分离光催化剂.采用X射线粉末衍射(XRD),高分辨透射电子显微镜(HRTEM)对所制得的样品进行了表征；并以甲基橙为降解对象,考察了镍锌铁氧体负载Cu2O可磁分离光催化剂的光催化性能.结果表明:Cu2O/镍锌铁氧体复合粉体对甲基橙溶液有较高的降解能力,重复使用4次光催化效率仍保持在81％,而且Cu2O/镍锌铁氧体光催化剂可通过外加磁场进行分离,具有较好的应用前景.%Nickel-zinc ferrite powders were prepared by coprecipitation method, and magnetically separable Cu2Oickel-zinc ferrite photocatalyst was prepared by hydrazine hydrate reduction method. The as-prepared sample was characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (TEM). The photocatalytic activities of magnetically separable Cu2Oickel-zinc ferrite photocatalyst were investigated by the degradation of methyl orange. The results show that the composite Cu2O-coated nickel-zinc ferrite powders had higher photocatalytic activity for methyl orange solution. In addition, its photocatalytic efficiency could be maintained at 81% when it was repeatedly used for 4 times. The magnetically separable Cu2Oickel-zinc ferrite photocatalyst could be separated from the system by applying an external magnetic field to it. It's considered that the Cu2O-coated nickel-zinc ferrite is a promising photocatalyst.