Bacteria-affinity aminated carbon nanotubes bridging reduced graphene oxide for highly efficient microbial electrocatalysis
| Autor: | Hao-Yi Cheng, Liming Yang, Difan Fang, Xubiao Luo, Chang Ziwen, Genping Yi, Dan Cui, Aijie Wang, Penghui Shao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Biocompatibility Bioelectric Energy Sources Oxide Carbon nanotube 010501 environmental sciences Electrocatalyst 01 natural sciences Biochemistry law.invention 03 medical and health sciences Electron transfer chemistry.chemical_compound 0302 clinical medicine law 030212 general & internal medicine 0105 earth and related environmental sciences General Environmental Science Bacteria Nanotubes Carbon Graphene Chemical engineering chemistry Electrode Graphite Current density |
| Zdroj: | Environmental Research. 191:110212 |
| ISSN: | 0013-9351 |
| DOI: | 10.1016/j.envres.2020.110212 |
| Popis: | Bioelectrochemical systems (BESs) exhibit great potential for simultaneous wastewater treatment and energy recovery. However, the efficiency of microbial electrocatalysis is fundamentally limited by the high resistance and poor biocompatibility of electrode materials. Herein, we construct a novel “binder-free” 3D biocompatible bioelectrode consists of 1D aminated carbon nanotubes (CNTs-NH2) and 2D conductive reduced graphene oxide (rGO) nanosheets through one-step electrodeposition. As expected, the maximum current density reached to 3.25 ± 0.03 mA cm−2 with the rGO@CNTs-NH2 electrode, which is 4.33-fold higher than that of a bare rGO (0.75 ± 0.01 mA cm−2), and is among the best performance reported for three-dimensional electrodes. The high microbial electrocatalytic activity is mainly attributed to the excellent performance of electron transfer and bacterial colonization, which originates from the 3D interconnecting scaffold, fast 1D CNTs “e-bridge” and positively charged surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect