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Self-assembled BiVO4 mesocrystals for efficient photocatalytic decontamination of microcystin-LR
Environmental Chemistry Letters ( IF 15.0 ) Pub Date : 2022-04-01 , DOI: 10.1007/s10311-022-01426-9
Xinqiang Cao 1, 2 , Yanfen Fang 1, 2 , David Johnson 1, 2 , Chuncheng Chen 1, 2 , Yan Gu 2, 3 , Junsong Chen 2, 3 , Hailin Tian 2, 3 , Yingping Huang 2, 3
Affiliation  

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 (kSA) 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.



中文翻译:

自组装 BiVO4 介晶用于高效光催化净化微囊藻毒素-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。

更新日期:2022-04-01
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