期刊
RENEWABLE ENERGY
卷 179, 期 -, 页码 788-801出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.07.080
关键词
Microbial fuel cell; Functionalized GO; Proton exchange membranes; Electricity generation
资金
- Iran National Science Foundation [97014305]
- Tarbiat Modares University (TMU) [IG-39804]
- Tarbiat Modares University, Tehran
This study innovatively explores the use of thiolated graphene oxide (TGO) in polyelectrolyte composite membranes to enhance microbial fuel cell (MFC) performance. The incorporation of sulfhydryl (-SH) and sulfonic (-SO3H) groups in the membranes improved proton selectivity and MFC efficiency. The new SPES/SGO and SPES/TGO membranes show promising potential for application in dual-chamber MFCs.
The present work examines, for the first time, the use of thiolated graphene oxide (TGO), in polyelectrolyte composite membranes as an effective approach to enhance the MFC performance. A new composite membrane based on a sulfonated polyethersulfone (SPES) hybrid with GO, sulfonated GO (SGO), and TGO was fabricated and assessed in MFC. The blend membranes were characterized with various techniques. The sulfhydryl (-SH) and sulfonic (-SO3H) groups enhanced the proton selectivity of the membrane and MFC performance. The MFC using the SPES/SGO1.8% composite membrane generated a power density of 66.4 mW/m(2) which was double that produced by MFC using Nafion117 membrane in batch mode which lasted for 8 days. The SPES/SGO membrane was more selective towards H+ rather than other cations (K+, Na+, and Li+). This was also confirmed by the results of proton conductivity analysis, as the SPES/SGO1.8% membranes showed a value of 1.42 mS/cm which was higher than Nafion117 (1.3 mS/cm), SPES/TGO1.8% (1.25 mS/cm), SPES/GO1.8% (0.56 mS/cm), and SPES (0.32 mS/cm). The higher COD removal and coulombic efficiency were obtained in MFC with SPES/SGO membranes. In conclusion, it is our view that the new SPES/SGO and SPES/TGO membranes can be applied favorably in dual-chamber MFCs meeting their needs. (C) 2021 Elsevier Ltd. All rights reserved.
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