| abstract |
The invention provides a preparation method of a Ti 3 C 2 @TiO 2 -C 3 N 4 heterojunction separation membrane with light-driven self-cleaning, by coupling photocatalysis technology and membrane separation technology. Studies have shown that MXene(Ti 3 C 2 T X ) nanosheets have thermodynamically metastable transition metal Ti atoms at the edge, which can form a Ti 3 C 2 T X @TiO 2 heterostructure through high-temperature orientation induction. However, the band gap of TiO 2 is wide, the absorption of sunlight is limited to the ultraviolet band, and the energy utilization rate is insufficient. In addition, the electron-hole pair recombination easily occurs during the photo-generated carrier migration process, resulting in low photocatalytic efficiency. The invention aims to develop a high-performance separation membrane by making full use of the self-oxidative properties of MXene, so as to realize the ultrafast permeability of the MXene-based separation membrane and the self-cleaning process driven by sunlight. |