Preparation of 1D/1D perylene diimide nano-rod modified Bi4O7 rod with highly active photocatalytic performance

The SAPDI/Bi4O7 composites (PB) were successfully prepared by modifying Bi4O7 with self-assembled perylene diimide (SAPDI) and analyzed by some measurements. The results showed that the synergistic interaction between Bi4O7 and SAPDI accelerated the transfer of photogenerated electrons. The photocatalytic degradation performance showed that Bi4O7 modified by SAPDI could effectively degrade Rhodamine B (RhB), methyl orange (MO) and methylene blue (MB) dyes, especially RhB, and the degradation rate was 51.5 times higher than that of Bi4O7. After four times recycling experiments, the degradation performance remains at 80%, revealing that the catalyst has good stability. Through captured experiments of active species, it is found that the main active substance is superoxide radicals (·O2−). Based on their electronic band structure, it is found that the photoinduced charge transfer mechanism belongs to type II.