There is a lack of efficient methods for removing microcystins produced by cyanobacterial blooms. Here, microsphere-like bismuth vanadate (BiVO₄-60) mesocrystals using a simple solvothermal method were prepared and applied to the photocatalytic degradation of microcystin-LR. The results show that the self-assembly of BiVO₄ mesocrystals is mainly due to the coordination between acetone and BiO⁺. The surface area normalized rate constant (k_SA) of microcystin-LR degradation for BiVO₄-60, of 4.02 × 10^–3 L/m²/min, is 3.56 times higher than that of BiVO₄-0, of 1.13 × 10^–3 L/m²/min. This enhanced photocatalytic activity is explained by the direct oxidation of photogenerated h⁺ produced on the (110)-oxidation facets. Moreover, BiVO₄-60 mesocrystals exhibit stable dispersion and photostability during microcystin-LR degradation. Overall, our findings demonstrate a facile strategy for synthesizing BiVO₄ mesocrystals, and provides a promising technology for degrading microcystin-LR.

缺乏去除蓝藻大量繁殖产生的微囊藻毒素的有效方法。在这里，使用简单的溶剂热法制备了微球状钒酸铋（BiVO ₄ -60）介晶，并将其应用于光催化降解微囊藻毒素-LR。结果表明，BiVO ₄介晶的自组装主要是由于丙酮与BiO ⁺的配位作用。_{BiVO 4} -60的微囊藻毒素-LR 降解的表面积归一化速率常数 ( k _SA )为 4.02 × 10 ^–3  L/m ^{2 /min，是 BiVO} ₄ -0 的 1.13 × 10的 3.56 倍^–3 升/米²/分钟。这种增强的光催化活性可以通过在 (110)-氧化面上产生的光生h ⁺的直接氧化来解释。此外，BiVO ₄ -60 介晶在微囊藻毒素-LR降解过程中表现出稳定的分散性和光稳定性。总的来说，我们的研究结果证明了一种合成 BiVO ₄介晶的简便策略，并为降解微囊藻毒素-LR 提供了一种有前途的技术。