For the first time, piezocatalysis activity has been observed in bismuth-based MOFs (ultrasound vibration treatment) with two different morphologies, namely FCAU-17 (flakes) and CAU-17 (rods). CAU-17 and FCAU-17 were synthesized by solvothermal and ultrasonic methods, respectively, with the same organic ligand (1,3,5-benzenetricarboxylic acid) and metal salt (Bi(NO₃)₃·5H₂O). Among these, the apparent rate constant k of CAU-17 in piezo-photocatalysis is 3.9 × 10⁻² min⁻¹, which is ∼3.9 and ∼ 1.5 times of those in photocatalysis and piezocatalysis, respectively. CAU-17 showed much high piezo-photocatalytic activity during degradation of RhB. Efficiently coupling between piezocatalysis and photocatalysis has been realized in rod-like CAU-17 (ultrasound vibration treatment). Our results provide a new strategy to improve catalytic performance of Bi MOFs through an efficient synergistic piezo-photocatalysis approach for environmental remediation.

首次在具有两种不同形态的铋基 MOF（超声振动处理）中观察到压电催化活性，即 FCAU-17（薄片）和 CAU-17（棒）。CAU-17和FCAU-17分别采用相同的有机配体（1,3,5-苯三甲酸）和金属盐（Bi(NO ₃ ) ₃ ·5H ₂ O），采用溶剂热法和超声法合成。其中，CAU-17在压电光催化中的表观速率常数k为3.9×10 ^-2  min ^-1，分别是光催化和压电催化的～3.9 和～1.5 倍。CAU-17 在 RhB 降解过程中表现出非常高的压电光催化活性。在棒状 CAU-17（超声振动处理）中实现了压电催化和光催化之间的有效耦合。我们的研究结果提供了一种新策略，通过一种有效的协同压电光催化方法来改善 Bi MOF 的催化性能，用于环境修复。