Self-assembled BiVO4 mesocrystals for efficient photocatalytic decontamination of microcystin-LR
Self-assembled BiVO4 mesocrystals for efficient photocatalytic decontamination of microcystin-LR
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DOI：
10.1007/s10311-022-01426-9
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发表时间：
2022-04
影响因子：
15.7
通讯作者：
Xinqiang Cao;Yan Gu;Yanfen Fang;David Johnson;Chuncheng Chen;Junsong Chen;H. Tian;Yingping Huang
中科院分区：
文献类型：
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作者：
Xinqiang Cao;Yan Gu;Yanfen Fang;David Johnson;Chuncheng Chen;Junsong Chen;H. Tian;Yingping Huang
目前还缺乏有效的去除蓝藻水华产生的微囊藻毒素的方法。采用简单的溶剂热法制备了微球状钒酸铋（BiVO 4 -60）介晶，并将其应用于微囊藻毒素LR的光催化降解。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光催化降解微囊藻毒素的表面积归一化速率常数（kSA）为4.02 × 10-3L/m2/min，是BiVO 4 -0的1.13 × 10-3L/m2/min的3.56倍。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。总之，我们的研究结果证明了一个简单的策略，合成BiVO 4介晶，并提供了一个有前途的技术降解微囊藻毒素LR。
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 BiVO4mesocrystals 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 × 10–3L/m2/min, is 3.56 times higher than that of BiVO4-0, of 1.13 × 10–3L/m2/min. This enhanced photocatalytic activity is explained by the direct oxidation of photogeneratedh+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 BiVO4mesocrystals, and provides a promising technology for degrading microcystin-LR.