Find in Library

La₂Ti₂O₇/HZSM-5 photocatalysts were prepared by sol-gel method, and its photocatalytic activity was studied. The results show that the original crystal phase of La₂Ti₂O₇ is not changed after loading La₂Ti₂O₇ on HZSM-5,and is still perovskite structure. La₂Ti₂O₇ is dispersed on the surface of HZSM-5 after loading to apparent increasing specific surface area and formation of new mesoporous structure. The growth of La₂Ti₂O₇ is constrainted by HZSM-5, resulting in the reduction of grain size. The absorption boundary has a blue shift and the band gap increases with decreasing La₂Ti₂O₇ loading content. Binding energies of La3d and O1s electrons move to higher energy after loading La₂Ti₂O₇ on HZSM-5. La₂Ti₂O₇/HZSM-5 has enhanced photocatalytic activity as compared to La₂Ti₂O₇. 91.8% of the reactive brilliant red(RBR) X-3B is decolorized on 70%La₂Ti₂O₇/HZSM-5 after 120min of UV irradiation, while only 31.7% of the dye is removed on La₂Ti₂O₇.