| abstract |
The invention relates to the technical field of polylactic acid, and discloses a Co 3 O 4 -TiO 2 heterojunction-supported carbon nanotube photocatalytic degradation material, comprising the following formula raw materials and components: TiO 2 -modified carbon nanotubes, Co (NO 3 ) 2 , Cr(NO 3 ) 2 . In this Co 3 O 4 ‑TiO 2 heterojunction-supported carbon nanotube photocatalytic degradation material, the reduced band gap energy of N-doped TiO 2 enables TiO 2 to generate photo-generated electrons under light radiation with lower energy and holes, S doping broadens the visible light absorption band of TiO 2 and improves the utilization rate of TiO 2 for light energy, Cr doping adds Co 3 O 4 to replace part of the lattice of Co, resulting in lattice defects and improving The electron transfer performance of Co 3 O 4 is improved, the migration rate of photo - generated electrons is accelerated, and the separation of photo-generated electrons and holes is beneficial . When irradiated on TiO 2 , the holes generated by the conduction band transition to the valence band of Co 3 O 4 and recombine with the photo-generated electrons generated by the valence band of Co 3 O 4 , reducing the recombination efficiency of the photo-generated electrons and holes of Co 3 O 4 . |