State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
School of Chemistry & Chemical Engineering, MIIT Key Lab Crit Mat Technol New Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2020 May;304:122907. doi: 10.1016/j.biortech.2020.122907. Epub 2020 Jan 28.
The hydrophilic three-dimensional (3D) structure of graphene materials was produced with reducing agent-ethylene glycol through hydrothermal reduction. Numerous microorganisms with diverse community structure were established in anode surface, as the hydrophilicity of the graphene anode increased; more populations of Proteobacteria and Firmicutes families were identified in a higher hydrophilic anode. In addition, the start-up time of a microbial fuel cell (MFC) equipped with hydrophilic 3D graphene anode was only 43 h, which is much shorter than traditional 3D graphene-based anode systems. The most hydrophilic anode exhibited the maximal power density of 583.8 W m, 5 times larger than the least hydrophilic one. The content of oxygen in graphene materials improving hydrophilicity would play an important role in enhancing power density. This study proves that hydrophilic 3D graphene materials as the anode can improve MFC performance and start-up time.
通过水热还原法，使用还原剂-乙二醇制备出具有亲水性三维（3D）结构的石墨烯材料。由于石墨烯阳极的亲水性增加，在阳极表面建立了具有不同群落结构的大量微生物；在更高亲水性的阳极中，鉴定出更多的变形菌门和厚壁菌门种群。此外，配备亲水性 3D 石墨烯阳极的微生物燃料电池（MFC）的启动时间仅为 43 小时，远短于传统的基于 3D 石墨烯的阳极系统。最亲水的阳极表现出 583.8 W m 的最大功率密度，比最不亲水的阳极大 5 倍。提高亲水性的石墨烯材料中的氧含量对于提高功率密度起着重要作用。本研究证明，作为阳极的亲水性 3D 石墨烯材料可以提高 MFC 的性能和启动时间。
