光合作用
二氧化碳
人工光合作用
醋酸
细菌
硫化镉
纳米颗粒
化学
环境化学
纳米技术
材料科学
光催化
生物
无机化学
催化作用
生物化学
有机化学
遗传学
作者
Kelsey K. Sakimoto,Andrew Barnabas Wong,Peidong Yang
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2016-01-01
卷期号:351 (6268): 74-77
被引量:779
标识
DOI:10.1126/science.aad3317
摘要
Improving natural photosynthesis can enable the sustainable production of chemicals. However, neither purely artificial nor purely biological approaches seem poised to realize the potential of solar-to-chemical synthesis. We developed a hybrid approach, whereby we combined the highly efficient light harvesting of inorganic semiconductors with the high specificity, low cost, and self-replication and -repair of biocatalysts. We induced the self-photosensitization of a nonphotosynthetic bacterium, Moorella thermoacetica, with cadmium sulfide nanoparticles, enabling the photosynthesis of acetic acid from carbon dioxide. Biologically precipitated cadmium sulfide nanoparticles served as the light harvester to sustain cellular metabolism. This self-augmented biological system selectively produced acetic acid continuously over several days of light-dark cycles at relatively high quantum yields, demonstrating a self-replicating route toward solar-to-chemical carbon dioxide reduction.
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