The layered Bi3O4Br nanoplates were synthesized through a simple calcination process, which can simultaneously harvest visible light and ultrasonic vibration to realize the effective piezo-photocatalysis. The piezo-photocatalysis over the Bi3O4Br leads to a great enhancement in catalytic efficiency with respect to the pure photocatalysis or piezocatalysis. The apparent rate constant of piezo-photocatalysis for the degradation of MO achieves to be 0.008 min[Formula: see text], which is 5.20 and 1.51 times as high as the individual piezocatalysis and photocatalysis, respectively. This enhancement would be attributed to the built-in piezoelectric field induced by ultrasonic vibration facilitating the separation of charge carriers in photoexcited Bi3O4Br.

中文翻译：

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Bi3O4Br纳米片作为一种高效的压电光催化剂用于有机染料降解

分层的 Bi3○4通过简单的煅烧工艺合成了 Br 纳米片，可以同时采集可见光和超声振动，实现有效的压电光催化。Bi上的压电光催化3○4相对于纯光催化或压电催化，Br 大大提高了催化效率。压电光催化降解MO的表观速率常数达到0.008 min[公式：见正文]，分别是单独的压电催化和光催化的5.20倍和1.51倍。这种增强将归因于由超声波振动引起的内置压电场，促进了光激发 Bi 中电荷载流子的分离3○4兄弟。