Photochromism-promoted highly efficient photocatalytic degradation in ferroelectric photochromics
Ferroelectric materials are increasingly being recognized as potential candidates for multi-field coupling catalysis (photo and pyro-/piezo catalysis) due to their intrinsic polarization behavior. However, ineffective separation of photogenerated carriers is still the main factor limiting their photocatalytic performance. Here, we report reversible photochromic bismuth layered ferroelectrics (Na0.5Bi4.5Ti4O15 (NBT) and Bi4Ti3O12 (BT)) with significantly enhanced catalytic degradation. It has been found that the photochromic reaction plays an important role in modulating the photocatalytic or piezocatalytic properties. The photocatalytic degradation rates of NBT and BT samples after visible light irradiation were 2.6 and 1.6 times those before irradiation, and the piezocatalytic degradation rates were 1.6 and 1.6 times those before irradiation, respectively. This work provides a feasible strategy to realize highly efficient photo/piezocatalytic behavior by controlling photochromic reactions.
危险品化学品经营许可证（带存储）