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标题：Graphene oxide and H₂ production from bioelectrochemical graphite oxidation
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作者：Lu Lu ; Cuiping Zeng ; Luda Wang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep16242
出版社：Springer Nature
摘要：Graphene oxide (GO) is an emerging material for energy and environmental applications, but it has been primarily produced using chemical processes involving high energy consumption and hazardous chemicals. In this study, we reported a new bioelectrochemical method to produce GO from graphite under ambient conditions without chemical amendments, value-added organic compounds and high rate H₂ were also produced. Compared with abiotic electrochemical electrolysis control, the microbial assisted graphite oxidation produced high rate of graphite oxide and graphene oxide (BEGO) sheets, CO₂, and current at lower applied voltage. The resultant electrons are transferred to a biocathode, where H₂ and organic compounds are produced by microbial reduction of protons and CO_2, respectively, a process known as microbial electrosynthesis (MES). Pseudomonas is the dominant population on the anode, while abundant anaerobic solvent-producing bacteria Clostridium carboxidivorans is likely responsible for electrosynthesis on the cathode. Oxygen production through water electrolysis was not detected on the anode due to the presence of facultative and aerobic bacteria as O₂ sinkers. This new method provides a sustainable route for producing graphene materials and renewable H₂ at low cost, and it may stimulate a new area of research in MES.