Effective inactivation of Microcystis aeruginosa by a novel Z-scheme composite photocatalyst under visible light irradiation
Effective inactivation of Microcystis aeruginosa by a novel Z-scheme composite photocatalyst under visible light irradiation
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新型Z型复合光催化剂可见光照射下有效灭活铜绿微囊藻
DOI：
10.1016/j.scitotenv.2020.141149
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发表时间：
2020
影响因子：
9.8
通讯作者：
Peifang Wang
中科院分区：
文献类型：
--
作者：
Dongxu Wang;Yanhui Ao;Peifang Wang
微囊藻（Microcystisaerosaosa）是最著名的有害藻类之一。本论文以藻类为研究对象，成功制备了Z型g-C3 N4-MoO 3（Mo-CN）复合光催化剂。所得复合材料对M.铜绿。结果表明，光催化剂（15 Mo-CN）在可见光照射下3 h，对藻细胞的去除率可达97%，这主要归功于其优异的表面性能和巧妙的结构设计。通过叶绿素a（chla）、相对电子传递速率（rETR）和最大光化学效率（Fv/Fm）评价了铜绿微囊藻的生理状态，均出现不同程度的下降。此外，所制备的光催化剂对藻细胞失活过程中泄漏的大分子有机物也表现出一定的去除活性。最后，根据实验和表征结果，推测了Z型光催化剂光催化灭活藻细胞的可能机理。本研究为藻类污染修复技术的发展提供了新的思路和基础理论。
Microcystisaeruginosais one of the most famous harmful algae. In this work,Z-scheme g-C3N4-MoO3(Mo-CN) composite photocatalysts were successfully synthesized to alleviate the algae pollution. The obtained composites exhibited excellent performance for the inactivation ofM. aeruginosa. The optimal photocatalysts (15Mo-CN) achieved a removal efficiency of 97% for the algal cells after 3 h visible light irradiation, which was attributed to their remarkable surface properties and ingenious structure design. The physiological status ofMicrocystis aeruginosawere evaluated by the chlorophylla(chla), relative electron transport rate (rETR) and maximum photochemical efficiency (Fv/Fm), and all of them decreased in different degrees. Furthermore, the as-prepared photocatalysts also show a certain activity for the removal of leaked macromolecule organic compounds during the process of algal cells inactivation. Finally, a possible mechanism on the photocatalytic inactivation of algal cells by theZ-scheme photocatalysts was deduced based on the experimental and characterization results. We believe this study would provide new insights into the development of promising technology and basic theory for remediation of algae pollution.