铜绿微囊藻
非生物成分
材料科学
光催化
开尔文探针力显微镜
接受者
光合作用
载流子
纳米技术
微生物
光化学
化学物理
化学
化学工程
光电子学
蓝藻
物理
原子力显微镜
生物
生态学
有机化学
细菌
工程类
催化作用
生物化学
遗传学
凝聚态物理
作者
Mao Jie,Xiaoqiang An,Zhenao Gu,Jing Zhou,Huijuan Liu,Jiuhui Qu
标识
DOI:10.1021/acs.est.0c01658
摘要
Exploring photoactive biotic-abiotic conjugations is of great importance for a variety of applications, but it remains difficult to probe the interfacial transfer of photoinduced charge carriers. In this work, Kelvin probe force microscopy, together with fluorescence imaging technique, were used to visually observe the spatial distribution and interfacial behavior of photocarriers in Microcystis aeruginosa/TiO2 hybrids. Experimental investigations suggested that photosynthetic microalgae cells were prone to trap photoholes from TiO2 photocatalysts. Oxygen vacancy defects in semiconductor exhibited significant impact on the charge migration, as the surface photovoltage of hydrogenated TiO2/microalgae hybrid was much higher than the pristine system. Profiting from the bioenhanced charge separation, biotic-abiotic architecture presented remarkably increased activity for photocatalytic inactivation of microalgae microorganisms. This work not only highlights the visual techniques for understanding the charge transfer around biotic-abiotic interface, but also provides a bioenhanced conjugation for the photocatalytic elimination of microorganisms in water treatment applications.
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