Synthesis of NiO/BiVO4/ZnFe2O4 heterojunction and its photocatalytic activity

摘要

Several key scientific and technical difficulties exist in photocatalysis based on TiO2, which make its extensive application in industry restricted. The prominent problems are the dissatisfactory quantum efficiency and the neglectable utilization of visible light. Nano-heterojunction phtocatalytic materials integrate the advantages nanomaterials and heterojunctions, which can improve the separation efficiency of photoproduction electrons and hole, increase the velocity constant of electron transferation between the interfaces and expend the spectral absorption in the visible light region. So NiO/BiVO4/ZnFe2O4 heterojunctions were made. Here hydrothermal method was exployed to prepare examples and 3 hours was spent to roast them at 330℃ after preparation. XRD, SEM and UV-vis diffuse reflectance spectra were used to characterize and analyse the examples. The phtocatalytic effect of NiO/BiVO4/ZnFe2O4 on methyl orange is also explored.