【摘要】 用高分子网络凝胶法制备TiO₂/ZnFe₂O₄纳米复合材料,研究了掺杂ZnFe₂O₄对TiO₂平均粒径、晶型及其光催化性能的影响.结果表明,掺杂的ZnFe₂O₄纳米晶高度分散、均匀地分布在TiO₂表面,促进了TiO₂向稳定的金红石相转变,并抑制了晶粒的长大.ZnFe₂O₄掺杂量为2%的TiO₂/ZnFe₂O₄粉体在500℃煅烧后,在可见光范围内具有最佳的次甲基蓝降解效果,降解率达到100%.ZnFe₂O₄的掺杂扩展了TiO₂的光谱响应范围.更多还原

【Abstract】 Nanoscale composites TiO₂/ZnFe₂O₄ were prepared by the polyacrylamide gel method. The effects of ZnFe₂O₄ concentration and sintered temperature on the properties and photocatalytic activities of TiO₂ were studied by XRD,TEM and UV-Vis.The results showed that the surface of TiO₂ was covered equally with dispersing highly nanocrystal ZnFe₂O₄,which accelerated the anatase-to-rutile phase transformation of TiO₂ and inhibited the growth of TiO₂ particles.The photocatalytic experimental results demonstrated that methylene blue could be photodegraded completely by TiO₂/ZnFe₂O₄ with 2%（wt）ZnFe₂O₄ dope concentration under visible light irradiation after sintered at 500℃.The dope of ZnFe₂O₄ has expanded spectrum response range of TiO₂.更多还原