Ultrasonic stimulation induced polarization behaviors in ferroelectric materials have been extensively explored in catalytic degradations. However, the ultrasonic wave similarly can realize dye degradation by the sonocatalysis behavior, which is always neglected in most reports on in-situ ultrasound-induced piezoelectric catalysis, so that people might overestimate piezocatalytic contributions. For this, we designed a series of visible light sensitive bismuth layered ferroelectric materials (BLFMs), M_0.5Bi_2.5Nb₂O₉ (MBN, M = Li, Na, and K). It is found that the cavitation-induced degradation rates of Rhodamine B (RhB) strongly depend mechanical stirring speeds under a fixed ultrasonic power, which gradually increases with it, and reaches 77.9% (500 rpm and 3 h). Under lower stirring speed and reaction time (<50 rpm and 2 h), the cavitation effect is almost negligible, only piezocatalysis behavior occurs, which can be used as a key condition to distinguish the piezocatalysis and sonocatalysis. In particular, the degradation rate constant of Na_0.5Bi_2.5Nb₂O₉ catalyst reaches up to 4.943 × 10⁻² min⁻¹ by the coupling of sonocatalysis, piezocatalysis and photocatalysis, which is much higher than that of single photocatalysis (0.491 × 10⁻² min⁻¹), piezocatalytic (1.6 × 10⁻³ min⁻¹), and sonocatalysis (0.756 × 10⁻² min⁻¹). These results may provide a feasible strategy of further improving catalytic degradation efficiency, and accurately determining the sonocatalysis and piezocatalysis contribution.

铁电材料中的超声刺激诱导极化行为已在催化降解中得到广泛研究。然而，超声波同样可以通过声催化行为实现染料降解，这在大多数原位超声诱导压电催化的报道中一直被忽视，因此人们可能高估了压电催化的贡献。为此，我们设计了一系列对可见光敏感的铋层状铁电材料 (BLFM)，M _0.5 Bi _2.5 Nb ₂ O ₉（MBN，M = Li、Na 和 K）。发现罗丹明 B (RhB) 的空化诱导降解率强烈依赖于固定超声功率下的机械搅拌速度，随着机械搅拌速度逐渐增加，达到 77.9%（500 rpm 和 3 h）。在较低的搅拌速度和反应时间（<50 rpm 和 2 h）下，空化效应几乎可以忽略不计，只发生压电催化行为，可作为区分压电催化和声催化的关键条件。特别是Na _0.5 Bi _2.5 Nb ₂ O ₉催化剂的降解速率常数高达4.943×10 ^-2 min ^-1通过声催化、压电催化和光催化的耦合，远高于单一光催化（0.491 × 10 ^-2 min ^-1）、压电催化（1.6 × 10 ^-3 min ^-1）和声催化（0.756 × 10 ^-2分钟^-1 )。这些结果可能为进一步提高催化降解效率和准确确定声催化和压电催化贡献提供一种可行的策略。