制氢
纳米颗粒
纳米技术
光催化
化学
氢
化学工程
发酵产氢
材料科学
光化学
催化作用
生物化学
生物制氢
有机化学
工程类
作者
Shuo Cui,Li-Jiao Tian,Jie Li,Xuemeng Wang,Houqi Liu,Xian-Zhong Fu,Ru‐Li He,Paul K.S. Lam,Tianyin Huang,Wen‐Wei Li
标识
DOI:10.1016/j.cej.2021.131254
摘要
Photosensitizing bacterial cells with semiconductor nanoparticles is an attractive way to enhance fermentative hydrogen production metabolism via harnessing solar energy as extra driving force, but the enhancement degree is typically limited by inefficient utilization of extracellular photo-electrons. Here, an intimately-coupled inorganic-bio hybrid with enhanced hydrogen-producing activity was constructed by utilizing self-assembled selenide/ sulfide semiconductor nanoparticles (CdSexS1-x) in Escherichia coli as the light harvester. Due to circumvention of transmembrane electron transfer limitation, this hybrid exhibited 2.6-fold higher hydrogen production rate than those with extracellular nanoparticles and achieved light energy conversion efficiency as high as 27.6%. The incorporation of photocatalysis did not impair the bacterial viability, attributed to an efficient scavenging of photo-excited holes by metabolites (e.g., lactate) and minimal reactive oxygen species production. Overall, the light-assisted fermentation system developed in this study offer opportunities for sustainable production of bio-hydrogen and may be extended to bio-photocatalytic production of other valuable chemicals.
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