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Solar‐Powered Organic Semiconductor–Bacteria Biohybrids for CO 2 Reduction into Acetic Acid
Author(s) -
Gai Panpan,
Yu Wen,
Zhao Hao,
Qi Ruilian,
Li Feng,
Liu Libing,
Lv Fengting,
Wang Shu
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202001047
Subject(s) - diimide , chemistry , perylene , fluorene , organic semiconductor , acetic acid , electron transfer , photochemistry , materials science , chemical engineering , organic chemistry , polymer , molecule , engineering
Abstract An organic semiconductor–bacteria biohybrid photosynthetic system is used to efficiently realize CO 2 reduction to produce acetic acid with the non‐photosynthetic bacteria Moorella thermoacetica. Perylene diimide derivative (PDI) and poly(fluorene‐co‐phenylene) (PFP) were coated on the bacteria surface as photosensitizers to form a p‐n heterojunction (PFP/PDI) layer, affording higher hole/electron separation efficiency. The π‐conjugated semiconductors possess excellent light‐harvesting ability and biocompatibility, and the cationic side chains of organic semiconductors could intercalate into cell membranes, ensuring efficient electron transfer to bacteria. Moorella thermoacetica can thus harvest photoexcited electrons from the PFP/PDI heterojunction, driving the Wood–Ljungdahl pathway to synthesize acetic acid from CO 2 under illumination. The efficiency of this organic biohybrid is about 1.6 %, which is comparable to those of reported inorganic biohybrid systems.