生物炭
光催化
电子转移
光化学
辐照
激进的
可见光谱
电子供体
化学
材料科学
环境化学
催化作用
光电子学
生物化学
物理
热解
有机化学
核物理学
作者
Chi Zhang,Wei Xiong,Yang Li,Lin Lü,Xinyi Zhou,Xinyan Xiong
标识
DOI:10.1016/j.jhazmat.2022.130013
摘要
Viruses transmitted by water have raised considerable concerns for public health. A novel memory photocatalyst of g-C3N4/WO3/biochar was successfully developed for effective inactivation of human adenoviruses (HAdVs) in water, in which WO3 as an electron-storage reservoir and biochar as an electron shuttle is employed to synergistically improve photocatalytic activity of g-C3N4. The tertiary composite exhibited continuous photocatalytic performance for HAdVs inactivation without regrowth in water under light-dark cycles, i.e., ∼3.9-log inactivation under 6-h visible light irradiation and an additional ∼1.1-log inactivation under the following 6-h dark. The enhanced virucidal mechanism was attributed to the heterojunction formation and especially the electron-transfer pathway switching via biochar incorporation, contributing to electron transfer and storage in the light phase and then electron release in the dark phase, along with obviously increased generation of the virus-killing •OH radicals under light-dark cycles.
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