摘要
长余辉光催化剂是性能优秀的新型功能材料,能高效利用太阳光进行环境净化。研究表明,具有优异可见光响应活性的光催化剂与适量长余辉材料进行有效复合是获得持续催化降解能力的关键。这类长余辉光催化剂不仅可以在光源照射下高效降解污染物,而且关闭光源后,在黑暗中,仅依赖肉眼可见的长余辉仍能继续进行催化降解反应。同时,在对于长余辉光催化剂的性能研究中,发现了许多有趣的现象。比如,与锐钛矿或金红石TiO_2相比,板钛矿TiO_2更适合与长余辉结合从而提高光催化能力[1];不同强度光源照射下,不同缺陷对于SrTiO_3的光催化活性,表现出不同的影响效果[2]。总之,通过可见光响应光催化剂与长余辉的有效结合,是实现24小时全天候光催化降解达到环境净化的理想策略。
Persistent luminescent photocatalysts appear to be a promising functional materials, which have high utilization efficiency of solar light. The study shows that excellent visible light induced photocatalysts coupled with an appropriate amount of long afterglow phosphors could continuously degrade pollutants in air or solution not only under light irradiation, but also after turning off the lamp irradiation, indicating the possibility of a full-time-active highly efficient photocatalysis system.
引文
[1]Li,H.;Yin,S.;Wang,Y.;Sato,T.J.Catal.2012,286:273
[2]Li,H.;Yin,S.;Wang,Y.;Sekino,T.;Lee,S.W.;Sato,T.J.Catal.2013,297:65